2018 Interstate Owner`s Manual

2018 Interstate
Owner ’s Manual
Disclaimer And Copyright
All information, illustrations and specifications contained in this manual are based on the latest product information
available at the time of publication approval. If and when new materials and production techniques are developed
that can improve the quality of its product, or material substitutions are necessary due to availability, Airstream
reserves the right to make such changes.
Airstream Interstate Touring Coach Owner’s Manual
©2017 Airstream, Inc. All rights reserved
Publication Date: November 2017
REV# 03
INTRODUCTION ������������������������������������������������������� 1-1
SPRINTER VAN��������������������������������������������������������� 7-1
SAFETY �������������������������������������������������������������������� 2-1
IMPORTANT SPRINTER INFORMATION��������������������������7-2
SAFETY PRECAUTIONS���������������������������������������������������2-2
FUEL ����������������������������������������������������������������������������������7-2
COMPONENT IDENTIFICATION���������������������������������������7-2
ALARMS AND DETECTORS ���������������������������������������������2-3
FIRE EXTINGUISHER �������������������������������������������������������2-9
CHANGING A TIRE�������������������������������������������������������������7-5
EMERGENCY EXIT �����������������������������������������������������������2-9
INSTALLING AND REMOVING A WHEEL �������������������������7-8
GENERAL INFORMATION����������������������������������������� 3-1
TIRE ROTATION�����������������������������������������������������������������7-9
LIMITED WARRANTY POLICY������������������������������������������3-2
AIR RIDE SUSPENSION �������������������������������������������������7-10
DRIVING ������������������������������������������������������������������� 8-1
LOADING ���������������������������������������������������������������������������8-2
FLOOR PLANS AND SPECIFICATIONS��������������������� 4-1
FLOOR PLANS ������������������������������������������������������������������4-2
TRAILER TOWING AND DRIVING TIPS ���������������������������8-5
TOWING A TRAILER����������������������������������������������������������8-6
INTERIOR ����������������������������������������������������������������� 5-1
TOWING YOUR TOURING COACH ����������������������������������8-9
SAFETY CHECK LIST �����������������������������������������������������8-10
ELECTRICAL ���������������������������������������������������������������������5-8
MAINTENANCE��������������������������������������������������������� 9-1
ENTERTAINMENT SYSTEMS �����������������������������������������5-16
MAINTENANCE SCHEDULE���������������������������������������������9-2
REPLACEMENT PARTS���������������������������������������������9-3
EXTERIOR ���������������������������������������������������������������� 6-1
WAXES AND POLISHES ���������������������������������������������������6-2
TOURING COACH FINISH ���������������������������������������6-2
TIRE CARE�������������������������������������������������������������������������9-5
BATTERY (MAINTENANCE FREE) �����������������������������������9-6
LPG SYSTEM���������������������������������������������������������������������9-7
ROADSIDE EXTERIOR FEATURES ���������������������������������6-6
CURBSIDE EXTERIOR FEATURES����������������������������������6-7
DRAIN AND WASTE SYSTEM ���������������������������������������� 9-11
ROADSIDE EXTERIOR FEATURES (GT) �������������������������6-8
WINTERIZING AND STORAGE���������������������������������������9-13
CURBSIDE EXTERIOR FEATURES (GT) �������������������������6-9
ELECTRICAL DIAGRAMS �����������������������������������������������9-17
SCREEN DOORS ������������������������������������������������������������6-10
FAQS AND ANSWERS ����������������������������������������������������9-33
AWNING��������������������������������������������������������������������������� 6-11
HITCH COVER�����������������������������������������������������������������6-12
2018 Interstate
2018 Interstate
Section 1
The Owner’s Manual for your new Airstream Touring
Coach is designed to respond to the most frequent
inquiries regarding the operation, function, and care of
the many systems that make modern motorhoming a
The Airstream Touring Coach is integrated into
a Sprinter Van, designed and manufactured by
Mercedes-Benz. Operation of the Sprinter, its engine,
power train, and other related components are
discussed in the Mercedes-Benz Sprinter Operator’s
Manual and other literature provided by MercedesBenz. Those systems discussed in the Sprinter
literature are warranted by Mercedes-Benz or their
Airstream realizes our customers possess varying
degrees of expertise in the area of repairing and
maintaining the appliances in their touring coach.
For this reason, the service and trouble-shooting
information found in this manual is directed toward
those with average mechanical skills. We also realize
you may be more familiar in one area than you are
in another. Only you know your capabilities and
We want you to use this manual, and hope you will find
the information contained in it helpful; however, should
you ever feel you may be “getting in over your head,’
please see your dealer to have the repairs made.
The operation and care of component parts such
as, refrigerator, furnace, water heater and others are
briefly explained in this manual.
All information, illustrations, and specifications
contained in this manual are based on the latest
product information available at the time of publication
approval. Airstream reserves the right to make
changes if and when new materials and/or production
techniques are developed that can improve the quality
of its product, or when material substitutions are
necessary due to availability.
2018 Interstate
We have provided many important safety messages
in this manual. Always read and obey all safety
A warning is used for a hazardous situation which,
if not avoided, could result in death or serious
injury to persons.
A caution is used to advise caution when
performing actions that could result in minor or
moderate injury to persons and/or damage to
A note is used to address practices not related
to personal injury. This applies to hazardous
situations involving property damage only.
Optional items may be available on all, or particular
models. Additionally, some optional items can only be
included during the manufacturing phase and cannot
later be added to the touring coach. The inclusion of
optional items information in this manual does not
imply or suggest the availability, application suitability,
or inclusion for any specific unit.
Your Mercedes-Benz Sprinter Van Operator’s and
Warranty Manuals contain important cautions,
warnings, operational, and warranty information on
the Sprinter and its components. All information
in the Sprinter manual should be reviewed
and followed for your safety. The Airstream
Interstate Owner’s Manual may provide additional
information and tips on the use of the van as a
touring coach; however, no information in the
Airstream manual should be interpreted as advice
or directions to disregard or void the warnings,
cautions, or other information contained in the
Sprinter’s manuals.
2018 Interstate
Section 2
SAFETY�������������������������������������������������������������������������� 2-1
Carbon Monoxide Detector���������������������������������� 2-4
SAFETY PRECAUTIONS ��������������������������������������� 2-2
This Carbon Monoxide
Detector Is Not ������������������������������ 2-4
Weight distribution ����������������������������������������������� 2-2
Tire Safety ����������������������������������������������������������� 2-2
Appliances and Equipment ���������������������������������� 2-2
Important Safety Precautions�������������������� 2-4
What Is Carbon Monoxide ����������������������������������� 2-5
Generator Safety ������������������������������������������������� 2-2
Conditions Which Can Result In
Dangerous CO Situations �������������� 2-5
Mold ��������������������������������������������������������������������� 2-2
Symptoms Of Carbon Monoxide Poisoning��������� 2-5
Regular maintenance������������������������������������������� 2-6
Chemical Sensitivity��������������������������������������������� 2-2
Basic Generator Safety Information��������������������� 2-6
Formaldehyde������������������������������������������������������ 2-3
Liquid Propane Gas (LPG) Detector��������������������� 2-7
Ventilation������������������������������������������������������������� 2-3
Low Voltage ���������������������������������������������� 2-7
Do Not Smoke ����������������������������������������������������� 2-3
Detector Test��������������������������������������������� 2-7
Medical advice ����������������������������������������������������� 2-3
Basic LPG Safety Information������������������������������ 2-8
ALARMS AND DETECTORS ���������������������������������� 2-3
If You Smell Gas ��������������������������������������� 2-8
Smoke Alarm ������������������������������������������������������� 2-4
FIRE EXTINGUISHER��������������������������������������������� 2-9
EMERGENCY EXIT������������������������������������������������� 2-9
2018 Interstate
Safety Precautions
Generator Safety
Many things can be construed as safety related, but
the most important is your common sense. If you are
careless with matches, cigarettes, flammable material,
or any other hazardous material, you surely realize
your potential for accidents is greatly increased.
Do not operate the generator in an enclosed building or
in a partly enclosed area, such as a garage. Be sure to
follow all instructions and warnings in this manual and
the generator manufacturer’s manual. Refer to Section
5 - Interior for generator information.
You will find many safety recommendations in this
section and throughout the manual. The following
recommendations are the ones we consider to be the
most important.
Weight Distribution
Touring coach’s have fresh water and wastewater
tanks, a water heater, and storage areas. It gives
you great flexibility in loading. With flexibility comes
responsibility. If you want to load down all the storage
compartments, the amount of fluids may have to be
reduced. It is a trade off so plan wisely. Distribute
your additional cargo as evenly as possible with the
heaviest objects located as low as possible.
Do you really want to carry a full freshwater tank to
a RV park 1,000 miles away and then hook up to a
city water supply? Even if you’re going to a remote
area, you can usually fill your water tank shortly
before entering the area. Just reducing your load by
10 gallons of water lets you carry an additional 83.5
pounds of cargo.
Tire Safety
Properly maintained tires improve the steering,
stopping, traction, and load-carrying capability of your
vehicle. Refer to Section 9 - Maintenance for tire care
and safety information. Also, be sure to read the Tire
Safety Manual Addendum included with your owner’s
Appliances and Equipment
The appliances (stove) and equipment (hot water
heater, furnace, generator, etc.) typically operate on
liquefied petroleum (LP) gas. LP gas is flammable and
is contained under high pressure. Improper use may
result in a fire and/or explosion. Make sure to follow
all instructions and warnings in this manual as well as
those in the specific owner’s manuals of the appliances
and equipment.
Mold and mold spores exist throughout indoor and
outdoor environments. There is no practical way
to eliminate all mold and mold spores in the indoor
environment; however, the way to control indoor
mold growth is to control moisture. Refer to Section
3 - General Information for information on controlling
condensation and molds.
Chemical Sensitivity and Ventilation
Chemical Sensitivity
Immediately after the purchase of your new
recreational vehicle and sometimes after it has been
closed up for an extended period of time, you may
notice a strong odor and/or experience a chemical
sensitivity. This is not a defect in your recreational
vehicle. Like your home, there are many different
products used in the construction of recreational
vehicles, such as carpet, linoleum, plywood, insulation,
upholstery, etc. Formaldehyde is also the by-product of
combustion and numerous household products, such
as some paints, coatings, and cosmetics. However,
recreational vehicles are much smaller than your home
and therefore, the exchange of air inside a recreational
vehicle is significantly less than in a home. These
products, when new or when exposed to elevated
temperatures and/or humidity, may off-gas different
chemicals, including formaldehyde. This off-gassing,
in combination with the minimal air exchange, may
cause you to experience irritation of the eyes, nose,
and throat, as well as sometimes headache, nausea,
and a variety of asthma-like symptoms. Elderly persons
and young children, as well as anyone with a history
of asthma, allergies, or lung problems, may be more
susceptible to the effects of off-gassing.
2018 Interstate
Formaldehyde is a naturally occurring substance and
is an important chemical used widely by industries
to manufacture building materials and numerous
household products. It is also a by-product of
combustion and certain other natural processes.
Thus, it may be present inside the touring coach.
Ventilation of the unit normally reduces the exposure to
a comfortable level.
To reduce or lessen exposure to chemicals from
off-gassing, it is of the utmost importance that you
ventilate your recreational vehicle. Ventilation should
occur frequently after purchase and at times when the
temperatures and humidity are elevated. Remember,
off-gassing is accelerated by heat and humidity. Open
windows, exhaust vents, and doors. Operate ceiling
and/or other fans, roof AC, and use a fan to force stale
air out and bring fresh air in. Decreasing the flow of
air by sealing the recreational vehicle increases the
formaldehyde level in the vehicle’s indoor air.
Trace levels of formaldehyde are released from
smoking, cooking, use of soaps and detergents, such
as carpet shampoos and cosmetics, and many other
household products. Some people are very sensitive to
formaldehyde while others may not have any reaction
to the same levels of formaldehyde. Amounts released
decrease over time.
Your Airstream touring coach was manufactured using
low formaldehyde-emitting (LFE) wood products,
the use of which is typical in the recreation vehicle
industry. Formaldehyde has an important role in
the adhesives used to bind wood products used in
recreation vehicles. The wood products in your coach
are designed to emit formaldehyde at or lower than
industry guidelines and should not produce symptoms
in most individuals.
While LFE wood products typically do not emit
formaldehyde at a level that would cause symptoms
in most individuals, it is possible, though not likely,
for symptoms to occur when the touring coach is
not properly ventilated. Ventilation is an essential
requirement for touring coach use for many reasons.
Any effects of formaldehyde can be greatly reduced
by actions such as opening windows, opening roof
vents, running the air conditioner, or some combination
thereof. In addition, the emission of formaldehyde by
these products naturally decreases rapidly over time.
Airstream strongly suggests you take measures to
properly ventilate your touring coach on a regular
basis. If you have any questions with respect to proper
ventilation of your touring coach, please do not hesitate
to contact your dealer or Airstream.
2018 Interstate
Do Not Smoke
It is recommended you do not smoke inside your
recreational vehicle. In addition to causing damage
to your recreational vehicle, tobacco smoke releases
formaldehyde and other toxic chemicals.
Medical Advice
Questions regarding the effects of formaldehyde on
your health should be submitted to your doctor or local
health department.
Alarms and Detectors
Parts of this section on the Smoke Alarm and Carbon
Monoxide Detectors are a reprint of the manual
included with each device and provided to you in the
Airstream owner’s briefcase. Please read, understand,
and follow all aspects of the complete manual before
activating and operating the Smoke Alarm and Carbon
Monoxide Detectors. If you have not received the
manuals, contact your dealership to obtain one, or
contact Airstream Customer Relations at 937-596-6111.
Dangers, Warnings, and Cautions alert you to
important operating instructions or to potentially
hazardous situations. Pay special attention to
these items.
Smoke Alarm
This Carbon Monoxide Detector Is Not
A smoke alarm is provided with your touring coach.
A manual pertaining to the alarm is included in the
paperwork given to you at the dealership. Please
read and follow all care, maintenance, and safety
information contained in the smoke alarm manual.
• Designed to detect smoke, fire, or any gas other than
Carbon Monoxide.
The smoke alarm will beep once a minute for at least
30 days when the battery is weak. The battery must
immediately be replaced with a fresh one.
Smoke alarms have a limited life. The unit should
be replaced immediately if it is not operating
properly. You should always replace a smoke alarm
after 10 years from the date of purchase. Write the
purchase date on the space provided on the back
of unit.
Carbon Monoxide Detector
• To be seen as a substitute for the proper servicing of
fuel-burning appliances.
• To be used on an intermittent basis, or as a portable
alarm for spillage of combustion products from fuelburning appliances.
This Carbon Monoxide detector is designed for
indoor use only. Do not expose to rain or moisture.
Do not knock or drop the alarm. Do not open
or tamper with the alarm as this could cause
malfunction. The detector will not protect against
the risk of Carbon Monoxide poisoning when the
batteries are dead or missing. The alarm will only
indicate the presence of Carbon Monoxide gas at
the sensor. Carbon Monoxide gas may be present
in other areas.
Carefully read and understand the contents of the
provided instruction manual before using the alarm.
Important Safety Precautions
Store the manual in a safe place for future reference.
Pay particular attention to the safety warnings. Pass
the manual on to any subsequent users of the alarm.
• Ideally, it is recommended that a Carbon Monoxide
detector should be installed in or near every room
that has a fuel burning appliance such as any room
heaters, water heaters, cookers, grills, etc.
This product is intended for use in ordinary, indoor
locations of family living units. It is not designed
to measure compliance with occupational safety
and health administration (OSHA) commercial or
industrial standards. Individuals who are at special
risk from Carbon Monoxide exposure by reason of
age, pregnancy, or medical condition may consider
using warning devices which provide audible and
visual signals for Carbon Monoxide concentration
under 30 ppm. If in doubt, consult your medical
Failure to replace this product by the “REPLACE
BY DATE” printed on the alarm cover may result in
death by Carbon Monoxide poisoning. Replace By
Date is six (6) years from the date of manufacture.
• Ensure that the alarm horn can be heard by all those
who are intended to hear it. Seek medical help if it
is suspected that a user of the RV is suffering from
Carbon Monoxide poisoning.
• If the alarm sounds, make sure to investigate the
problem. Ignoring the alarm may result in sickness,
injury or death. (CO may be present even if nothing
is seen or smelled by the user.)
• Room spaces should be well ventilated when
household cleaning supplies are used as these may
cause a false alarm.
• Alarm should be tested once per week. If further
details are required, which do not appear in this
manual, contact BRK Brands Inc. First Alert.
Activation of your Carbon Monoxide alarm’s
audible horn indicates the presence of Carbon
Monoxide that can kill you. Leave the area
2018 Interstate
What Is Carbon Monoxide
Symptoms of Carbon Monoxide Poisoning
Carbon Monoxide (CO) is a highly poisonous gas that
is released when fuels are burned. It is invisible, has
no smell, and is therefore very difficult to detect with
the human senses. Under normal conditions, in a room
where fuel-burning appliances are well maintained and
correctly ventilated, the amount of CO released into the
room by appliances is not dangerous.
• Mild Exposure - Slight headache, nausea, vomiting,
fatigue (flu-like symptoms).
These fuels include wood, coal, charcoal, oil, natural
gas, gasoline, kerosene, and propane. Common
appliances are often sources of CO. If they are not
properly maintained, are improperly ventilated, or
malfunction, CO levels can rise quickly. CO is a real
danger in air-tight vehicles with added insulation,
sealed windows, and other weatherproofing that can
trap CO inside.
The following conditions can result in potentially
dangerous CO situations
1. Excessive spillage or reverse-venting of fuelburning appliances caused by outdoor conditions,
such as:
Wind direction and/or velocity, including high
gusts of wind.
Heavy air in the vent pipes (cold/humid air with
extended periods between cycles).
Negative pressure differential resulting from
use of exhaust fans.
Simultaneous operation of several fuel-burning
appliances competing for limited internal air.
Vent-pipe connections vibrating loose from
clothes dryers, furnaces, or water heaters.
Obstructions in or unconventional ventpipe designs which can amplify the above
• Medium Exposure - Throbbing headache,
drowsiness, confusion, fast heart rate.
• Extreme Exposure - Convulsions, unconsciousness,
heart and lung failure. Exposure to CO can cause
brain damage and/or death.
Smoke and CO Alarms are shipped with batteries
deactivated. Ask dealer to activate batteries or
activate batteries immediately upon delivery.
Failure to follow warning will remove your
Many causes of reported CARBON MONOXIDE
POISONING indicate that while victims are aware
that they are not well, they become so disoriented
that they are unable to save themselves by either
exiting the area or calling for assistance. Also
young children and pets may be the first to be
Test Units in your touring coach after the vehicle
has been in storage, before each trip, and at least
once a week while in use. If the alarm ever fails to
test correctly, have it replaced immediately. If the
alarm is not working properly, it cannot alert you
to a problem. Failure to test units used in RVs as
described may remove your protection.
2. Extended use of un-vented fuel burning devices.
3. Temperature increase that can trap exhaust gases
near the ground.
2018 Interstate
Regular Maintenance
Basic Generator Safety Information
The smoke alarm and CO detector have been
designed to be as maintenance-free as possible, but
there are a few simple things you must do to keep them
working properly. Use only the replacement batteries
recommended. The units may not operate properly with
other batteries. Never use rechargeable batteries since
they may not provide a constant charge.
1. Never sleep in the vehicle with the generator running
without ensuring the Carbon Monoxide detector is
working. Primary protection against inhaling Carbon
Monoxide is daily (every eight hour) inspection for
visible and audible generator exhaust system leaks.
Test it at least once a week.
Clean the Smoke and CO Alarms at least once a
month: gently vacuum the outside of the Smoke
and CO Alarms using your household vacuum’s
soft brush attachment. A can of clean, compressed
air (sold at computer or office supply stores) may
also be used. Follow manufacturer instructions for
use. Test the Smoke and CO Alarms once a week.
Never use water, cleaners, or solvents, since they
may damage the unit.
If the Smoke and CO Alarms becomes
contaminated by excessive dirt, dust, and/or grime,
and cannot be cleaned to avoid unwanted alarms,
replace the unit immediately.
Relocate the unit if it sounds frequent unwanted
The battery door will resist closing unless batteries
are installed. This warns you that the unit will not
operate without batteries. The Smoke and CO
Alarms cannot operate without working batteries.
Removing the batteries for any reason, or failing to
replace the batteries at the end of their service life,
removes your protection.
Carbon Monoxide is poisonous and can cause
confusion, unconsciousness, and death. Follow all
instructions, cautions, and warnings in this section
and the generator operator’s manual.
2. DO NOT operate the generator in an enclosed
building or in a partly enclosed area such as a garage.
3. Review the safety precautions for fuel and exhaust
fumes in the generator manual.
4. DO NOT operate the generator when the recreation
vehicle is parked in high grass or brush. Heat from the
exhaust could cause a fire in dry conditions.
5. DO NOT simultaneously operate generator
and a ventilator which could result in the entry of
exhaust gas. When exhaust ventilators are used, we
recommend that a window on the opposite side of the
unit “upwind” of exhaust gases be opened to provide
cross ventilation.
6. When parked, orient the vehicle so that the wind
will carry the exhaust away from the vehicle. DO NOT
open nearby windows, ventilators, or doors into the
passenger compartment, particularly those which can
be “down wind”, even part of the time.
7. DO NOT operate the generator when parked in
close proximity to vegetation, snow, buildings, vehicles,
or any other object that could deflect the exhaust under
or into the vehicle.
8. DO NOT touch the generator when running, or
immediately after shutting off. Heat from the generator
can cause burns. Allow the generator to cool before
attempting maintenance or service.
The generator is located under the touring coach
in front of the spare tire. The spare tire may have to
be lowered to access the service door. See spare
tire instructions in the Sprinter section of this
NEVER ignore any alarm. Failure to respond can
result in injury or death. The Silence Features are
for your convenience only and will not correct a
problem. Always check your touring coach for a
potential problem after any alarm. Failure to do so
can result in injury or death.
2018 Interstate
Liquid Propane Gas (LPG) Detector
Detector Test
The Test/Reset button is used to verify proper alarm
function. Executing the test function sounds the alarm
and illuminates the red LED. The test will sound the
alarm twice, with 4 beeps in 1 second, followed by 5
seconds of silence. By pressing the button, you can
verify that the alarm sounds and the LED functions
This detector has a seven-year life; see end-of-life
notification in LPG detector manual. Please read the
entire detector manual before operating the unit.
The LPG detector is located in the galley area. LPG
is a mixture of gases produced and sold commercially
as a fuel for heating and cooking appliances. LPG is
highly flammable and, as a result, can be explosive if
ignited under certain circumstances. LPG is heavier
than air and, if confined in a closed space, will
accumulate close to the floor. The LPG detector is
designed to alarm at less than 25 percent of the legal
explosive limit. It will provide a visual and audible alarm
by sounding an alarm every 5 seconds and lighting the
red light emitting diode (LED).
Your LPG detector is wired directly to your touring
coach battery and incorporates a 1-amp, in-line fuse.
It has no internal battery backup. In normal stand-by
mode, the LED indicator will be green.
Low Voltage
The operating voltage for the detector is 12 VDC. The
actual voltage supplied to the detector in a recreational
vehicle may drop below the minimum 8 VDC. The
detector provides the user with a low voltage warning
before reaching that level and will provide additional
distinct, clear warnings and alarms after the 8 VDC
level is reached. However, if available power supplied
to the unit is below the operating voltage of 8 VDC,
the detector will not detect gas or provide protection
against dangerous levels of LPG.
Activation of this detector indicates the possible
presence of LPG, which can cause an explosion
and/or fire, causing serious injury or death. This
normally indicates a leak in the LPG installation or
an LPG appliance. Extinguish all open flames, open
your windows and door, and evacuate the unit
immediately. Do not activate any electrical switch.
Turn off the LPG using the remote shut off switch.
Do not re-enter your unit until a qualified repair
technician has corrected the problem and certified
the system as safe.
It is not recommended that the detector be
disconnected from the battery during periods of
storage. There is a small heater on the sensor of
the device that burns away impurities in the air
during periods of normal use. During periods when
power is interrupted, impurities can build up on the
sensor. When power is returned to the detector,
the detector alarm may activate until the impurities
are burned off. This could take a number of hours,
during which time the alarm will be constantly on.
Have a qualified technician check your LPG system
annually or if you detect any signs of leaks or
Refer to Section 5 - Interior and Section 6 Exterior for additional LPG warnings and safety
2018 Interstate
Basic LPG Safety Information
If you smell gas
A warning label has been positioned in the cooking
area to remind you to provide an adequate supply of
fresh air for combustion. Unlike homes, the amount
of oxygen supply is limited due to the size of the
recreational vehicle, and proper ventilation when
using the cooking appliances will avoid dangers of
asphyxiation. It is especially important that cooking
appliances not be used for comfort heating as the
danger of asphyxiation is greater when the appliance is
used for long periods of time.
• Extinguish any open flames, pilot lights and all
smoking materials.
Portable fuel burning equipment, including wood and
charcoal grills and stoves, shall not be used inside
the recreational vehicle. The use of this equipment
inside the recreational vehicle may cause fires or
A Warning Label has been located near the LP
gas container. This label reads: DO NOT FILL
OF CAPACITY. Overfilling the LP gas container can
result in uncontrolled gas flow that can cause a fire
or explosion. A properly filled container will contain
approximately 80 percent of its volume as liquid LP
DO NOT store LP containers within vehicle. LP
containers are equipped with safety devices that
vent gas should the pressure become excessive.
DO NOT use cooking appliances for comfort
heating. Cooking appliances need fresh air for safe
operation. Before operation, open overhead vent or
turn on exhaust fan and open window.
• Do not touch electrical switches.
• Shut off the gas supply using the remote shut off
• Open doors and other ventilating openings.
• Leave the area until odor clears.
• Have the gas system checked and leakage source
corrected before using again.
LP gas regulators must always be installed with the
diaphragm vent facing downward. Regulators that
are not in compartments have been equipped with a
protective cover. Make sure that regulator vent faces
downward and that cover is kept in place to minimize
vent blockage that could result in excessive gas
pressure causing a fire or explosion.
The regulator at the LP tank is under a gray, plastic
cover. The protective cover helps to keep the vent on
the regulator from being clogged by wasps or ice, but
the regulator should be checked regularly to make sure
the vent remains clear.
Do not attempt to seal regulator cover.
Check vent each time tank is filled to make sure it
is clear of obstructions.
Have a qualified technician check your LP Gas
system annually or if you have any signs of leaks
or malfunctions.
2018 Interstate
Fire Extinguisher
Emergency Exit
There are three avenues of escape from the touring
coach in the event of an emergency, the driver’s door,
the passenger door, and the sliding side cargo door.
As always, safety should be one of your top priorities.
Make sure you and everyone traveling with you can
operate these doors and exit rapidly without light. A
little planning and a quick practice session at each
camping site is well worth the time it may take.
The fire extinguisher should be checked for charge on
a regular basis. Make sure your family, especially the
cook, knows how to release the extinguisher storage
bracket and how to properly operate the extinguisher.
Check with your local fire department for professional
advice on its operation and use if you find the
directions on the extinguisher unclear. They will be able
and willing to assist you and your family.
Read the directions carefully on the fire
extinguisher. If there is any doubt on the operation
you and your family should practice, then replace
or recharge the extinguisher. You will find your
local fire department will be happy to assist you
and answer any questions.
At each campsite, make sure you have not parked
in such a manner as to block the operation of the
doors or the escape avenues by being too close to
trees, fences, or other impediments. Scenic views
are one reason for traveling, but do not park so
the beautiful lake or steep cliff is just outside your
doors. Do not block access to the doors from the
inside or outside of the vehicle.
Other safety information on the LPG system of your
touring coach is located in the Plumbing Section of this
Do not smoke in bed. Keep matches out of reach
of small children. Do not clean with flammable
material. Keep flammable material away from open
flame. We have all heard these warnings many
times, but they are still among the leading causes
of fires.
2018 Interstate
2018 Interstate
Section 3
GENERAL INFORMATION��������������������������������������������� 3-1
CAMPING����������������������������������������������������������������� 3-6
LIMITED WARRANTY POLICY������������������������������� 3-2
Suggested Pre-Travel Check List������������������������� 3-6
Warranty Coverage���������������������������������������������� 3-2
Interior������������������������������������������������������� 3-6
Coverage Ends����������������������������������������������������� 3-2
Exterior������������������������������������������������������ 3-6
Limitation Of Implied Warranties�������������������������� 3-2
Touring Coach Equipment And
Accessories ����������������������������������� 3-6
Repair Remedy����������������������������������������������������� 3-2
Back-Up Remedy������������������������������������������������� 3-2
What Is Not Covered ������������������������������������������� 3-3
Disclaimer Of Incidental And
Consequential Damages�������������������������� 3-3
Motoring Essentials����������������������������������� 3-6
Overnight Stop����������������������������������������������������� 3-7
Overnight Or Weekend Trips ������������������������������� 3-7
Longer Trips��������������������������������������������������������� 3-7
Obtaining Warranty Service��������������������������������� 3-4
Extended Stay ����������������������������������������������������� 3-7
Consumer Arbitration Program����������������������������� 3-4
Leveling����������������������������������������������������� 3-7
Events That Discharge Airstreams Obligations ��� 3-4
Effects Of Prolonged Occupancy������������������������� 3-8
Airstream Limited Warranty Excludes������������������ 3-4
About Molds��������������������������������������������������������� 3-9
Normal Wear��������������������������������������������� 3-4
What Are Molds����������������������������������������� 3-9
Accident����������������������������������������������������� 3-4
What Factors Contribute
to Mold Growth������������������������������ 3-9
Abuse��������������������������������������������������������� 3-5
Exposure��������������������������������������������������� 3-5
How Can Mold Growth
Be Inhibited ����������������������������������� 3-9
Overload ��������������������������������������������������� 3-5
Waste Water System ������������������������������������������� 3-9
Chemical Gassing������������������������������������� 3-5
Things Not To Put
Into Toilet Or Drains ���������������������� 3-9
Sprinter Van ���������������������������������������������� 3-5
SERVICE����������������������������������������������������������������� 3-5
Reporting Safety Defects������������������������������������� 3-6
Drain Systems ��������������������������������������������������� 3-10
Winter Traveling������������������������������������������������� 3-10
Heated Tanks������������������������������������������� 3-11
Safety����������������������������������������������������������������� 3-11
2018 Interstate
General Information
Limited Warranty Policy
This Limited Warranty Covers
(i) The first retail owner and any subsequent owners
(ii) ONLY those portions of a NEW motorhome not
excluded under the section “What is Not Covered”,
when sold by an authorized dealership; and, (iii) ONLY
defects in workmanship performed and/or materials
used to assemble those portions of your motorhome
not excluded under the section “What is Not Covered”.
“Defect” means the failure of the workmanship
performed and/or materials used to conform with the
design and manufacturing specification and tolerances
of Airstream. The Limited Warranty is transferable and
the subsequent owner’s warranty coverage period
shall be the unexpired balance of the original warranty
coverage period. A completed copy of the Warranty
Transfer Form must be submitted to Airstream at the
time of resale.
Coverage Ends
36 months after the first retail owner first takes delivery
of the motorhome from an authorized dealership or
after the odometer reaches 36,000 miles, whichever
occurs first. Any action for breach of this warranty or
any implied warranties must be commenced not more
than 37 months after breach. Some states do not allow
the reduction of the time when a breach of warranty
claim must be commenced, so the reduction in time
when a breach of warranty claim must be commenced
may not apply to you.
Limitation Of Implied Warranties
Implied warranties arising under applicable law, if
any, including but not limited to implied warranties of
merchantability or fitness for a particular purpose, are
hereby limited in duration to the term of this limited
warranty and are limited in scope of coverage to those
portions of the motorhome covered by this limited
warranty. There are no express warranties or any
implied warranties of merchantability on those portions
of the motorhome excluded from coverage. There is
no warranty of any nature made by airstream beyond
that contained in this limited warranty. No person has
authority to enlarge, amend or modify this limited
warranty. The dealer is not airstream’s agent. Airstream
is not responsible for any undertaking, representation
or warranty made by any dealer or others beyond those
expressly set forth within this limited warranty. Some
states do not allow limitations on how long an implied
warranty lasts, so the above limitations may not apply
to you.
Repair Remedy
Airstream’s sole and exclusive obligation is to repair
any covered defects discovered within the warranty
coverage period if: (1) within 10 days of your discovery
of a defect you notify Airstream OR an authorized
dealership of the defect; AND (2) you deliver your
Motorhome to Airstream OR an authorized dealership
at your cost and expense.
Back-Up Remedy
If the primary repair remedy fails to successfully
cure any defect after a reasonable number of repair
attempts, your sole and exclusive remedy shall be to
have Airstream pay an independent service shop of
your choice to perform repairs to the defect OR if the
defect is incurable, have Airstream pay diminution in
value damages. The repair remedy and the back-up
remedy must both be exhausted and these remedies
must fail to fulfill their essential purpose before you can
seek any legal or equitable relief. This limited warranty
is not a warranty that promises or extends to future
performance because the warranty does not make a
representation on how your motorhome will perform in
the future but instead represents only what the remedy
will be if a defect exists.
Unless prohibited by state law, repairs will not extend
the time when you must commence a breach of
warranty claim and shall not extend the warranty
coverage period. Any performance of repairs after
the warranty coverage ends OR any performance of
repairs to those portions of your motorhome excluded
from coverage shall be considered “good will” repairs.
Warranty repairs should be expected. Airstream
may use new and/or remanufactured parts and/or
components of substantially equal quality to complete
a repair. Damage to interior or exterior surfaces, trim,
upholstery and other appearance items may occur
at the factory during assembly, during delivery of the
motorhome to your selling dealer or on the selling
dealer’s lot. Normally, any damage is detected and
corrected at the factory or by the selling dealer during
the inspection process. If you discover any damage
when you take delivery of your motorhome, you MUST
notify your dealer OR Airstream within 10 days of
the date of purchase to have damage repaired at no
cost to you. Minor adjustments, such as adjustments
to the interior or exterior doors, drawers, latches
will be performed at no cost to you by your selling
dealer during the first 90 days of warranty coverage;
thereafter, such adjustments are your exclusive
responsibility as normal maintenance.
2018 Interstate
General Information
What Is Not Covered
1. Tires, batteries, stereo, television, range/stove,
furnace, refrigerator, air conditioner, toilet, water
heater, microwave, generator, glass breakage, and
other materials, parts and components warranted
by persons or entities other than Airstream. Please
refer to the warranties of component manufacturers
for terms and conditions of coverage;
2. Accessories and equipment that are working as
designed, but which you are unhappy because of
the design
3. Any part or component of the vehicle that was not
manufactured or installed by Airstream;
4. Normal deterioration due to wear or exposure,
including but not limited to upholstery, flooring rust,
corrosion, oxidation, and cosmetic blemishes;
5. Normal maintenance and service items, including
but not limited to light bulbs, fuses, lubricants,
sealants and seals, door adjustments, and awning
6. After-market equipment or accessories installed
on the vehicle after completion of manufacture by
Airstream, or any defects or damage caused by
such items;
7. Vehicles not purchased through an authorized
dealer of Airstream and vehicles purchased
directly or indirectly through auction, salvage,
repossession, or other non-customary sale means;
8. Defects or damage caused by, in whole or in
part, or in any way related to: Accidents, misuse
(including off-road use), or negligence; Failure
to comply with the instructions set forth in any
owner’s manual provided with the vehicle;
Alteration or modification of the vehicle except
such alterations or modifications approved
in writing by Airstream; Acts of God or other
environmental conditions, such as lightning,
hail, salt causing rust, or other chemicals in the
atmosphere; De-icing agents or other chemicals
applied to the vehicle; Failure to properly maintain
or service the vehicle, including but not limited to
the maintenance of lubricants, sealants, and seals;
2018 Interstate
Condensation and the results of condensation
including water damage and the growth of mold
or mildew. Mold and mildew are natural growths
given certain environmental conditions and are
not covered by the terms of this Limited Warranty;
Use of the motorhome other than for temporary
recreation purposes, including but not limited to
use of the motorhome for residential, commercial,
disaster relief, or rental purposes; The addition of
weight to the vehicle that causes the total weight
to exceed applicable vehicle weight ratings, or
addition of weight causing improper distribution
of the weight of the vehicle; Failure to seek and
obtain repairs in a timely manner; Failure to use
reasonable efforts to mitigate damage caused by
defects’ Failure to properly ventilate the vehicle;
Improper electric power supply or improper vehicle
hookup to other facilities; and, Acts or omissions of
any person or entity other than Airstream. (Note: It
shall be concluded that the travel trailer has been
used for commercial and/or business purposes
if the travel trailer owner or user files a tax form
claiming any business or commercial tax benefit
related to the travel trailer, or if the travel trailer is
purchased, registered or titled in a business name.)
Disclaimer Of Incidental And Consequential
Airstream disclaims any and all incidental and
consequential damages, including but not limited
to expenses such as transportation to and from
dealerships and Airstream repair facilities, loss of time,
loss of pay, loss of use, inconvenience, commercial
loss (including but not limited to lost profits), towing
charges, bus fares, vehicle rental, service call
charges, gasoline expenses, incidental charges such
as telephone calls and facsimile transmissions, and
expenses for lodging and moisture damage such
as mold and mildew as well as rust and corrosion.
This disclaimer is independent of any failure of the
essential purpose of any warranties provided with the
motorhome, and shall survive any determination that
a warranty failed of its essential purpose. Some states
do not allow the exclusion or limitation of incidental
or consequential damages, so the above limitation or
exclusion may not apply to you.
General Information
Obtaining Warranty Service
Consumer Arbitration Program
In order to obtain warranty service under this Limited
Warranty, the owner must do all of the following:
For recreation vehicles purchased in the State of
California, Airstream, Inc. participates in the Consumer
Arbitration Program for Recreation Vehicles (CAP-RV).
This third-party dispute resolution program is available,
at no charge to you, to settle unresolved warranty
disputes for recreation vehicles. This dispute resolution
program reviews eligible product and service related
complaints involving warranty covered components.
To find out more about this program, or to request
an application/brochure, please call the Arbitration
Administration office toll-free 800.279.5343. The CAPRV program operates as a certified mechanism under
the review of the California Arbitration Certification
Program. Members of the armed forces who purchased
the vehicle in California, or who were stationed in
or a resident of California at the time of purchase
(regardless of state of purchase) or who are stationed
in California at the time of application to this program
may utilize the CAP-RV program.
1. Owner and dealer representative must complete
and return the Customer Performance Checkout
within 10 days from delivery of the vehicle,
2. Notify Airstream or one of its authorized,
independent dealers of any claimed defect within
the warranty period or 10 days thereafter,
3. Provide notification of a defect within 10 days of
discovery of that defect, and
4. Promptly return the motorhome to an authorized
Airstream dealer or Airstream for repairs.
If you believe a defect covered by this Limited Warranty
still exists after an attempted repair by an authorized
Airstream dealer, you must contact Airstream at the
following address, specifying:
1. The complete serial number of the motorhome,
2. The date of original purchase and the date of
original delivery,
3. The name of the selling dealer, and
4. The nature of the problem and the steps or service
which have been performed.
Airstream, INC.
428 West Pike Street
P.O. Box 629
Jackson Center, Ohio 45334-0629
Attention: Owner Relations Department
Airstream may direct you to an authorized Airstream
dealer, or may request that you bring your motorhome
to the Airstream factory in Jackson Center, Ohio for
Airstream does not control the scheduling of repairs
at its authorized Airstream dealers, and repairs at the
Airstream factory may not be immediately available.
Therefore, you may encounter delays in scheduling
repairs and/or completion of repairs. All costs
associated with transporting the motorhome for any
warranty service shall be the sole responsibility of the
Events That Discharge Airstream’s Obligations
Under This Limited Warranty
Misuse or neglect, accidents, unauthorized alteration,
failure to provide reasonable and necessary
maintenance (see Owner’s Manual), damage caused
by off road use, collision, fire, theft, vandalism,
explosions, overloading in excess of rated capacities,
odometer tampering, and use of the motorhome
for commercial, business, or rental purposes shall
discharge Airstream from any express or implied
warranty obligation to repair any resulting defect.
Airstream Limited Warranty Excludes
Normal Wear
Items such as curtains, upholstery, floor coverings,
and window, door, and vent seals will show wear or
may even wear out within the 2-year warranty period,
depending upon the amount of usage, weather, and
atmospheric conditions.
We strongly urge our dealers and customers to inspect
the touring coach upon receipt of delivery for any
damage caused by accident while being delivered to
the dealer, or while it is on the dealer’s lot. Damage
of this nature becomes the dealer or customer’s
responsibility upon acceptance of delivery, unless
Airstream is notified and the person making the
delivery verifies the damage. Glass breakage, whether
obviously struck or mysterious, is always accidental
and covered by most insurance policies.
2018 Interstate
General Information
Lack of customer care and/or improper maintenance
will result in early failure for which Airstream cannot be
held responsible.
Deterioration by sunlight is possible to such items as
tires, curtains or upholstery. Steel or metal surfaces are
subject to the elements, causing rust and corrosion that
is normal and beyond the control and responsibility of
Overload Damage due to loading beyond capacity
or to cause improper balance is not covered by the
Airstream Limited Warranty. The Airstream Touring
Coach is engineered to properly handle any normal
load. There are limits to the amount of load that can
be safely transported depending upon speed and road
conditions. If these limits have been exceeded, the
Airstream Limited Warranty will not cover resulting
damage. For additional information on the load
capacity of your touring coach, consult your Sprinter
and Airstream Owner’s Manuals or gross vehicle
weight rating plate.
Chemical Gassing
Chemical gassing is not a “Defect” in your recreational
vehicle and is not covered by the Limited Warranty.
Please follow the recommendations in this manual to
address this concern.
Sprinter Van
Airstream, Inc., does not accept any responsibility
in connection with any of its touring coach’s for the
Sprinter Van or its components. The Sprinter Van
and its components are covered by Mercedes-Benz
Warranties as explained by Sprinter literature provided.
Your Sprinter Van and its components are pre-checked
by its manufacturer before delivery to Airstream. All
service to the Sprinter Van and its components must
be performed by Mercedes-Benz Sprinter designated
service points according to the manufacturer’s warranty
and service policies. The literature provided with each
touring coach gives important information concerning
its warranty coverage, maintenance, and operation.
The Airstream Interstate Owner’s Manual may provide
additional information and tips on the use of the van as
a touring coach, however, no information, in whole or in
part, in any Airstream manual should be interpreted as
advice or directions to disregard or void the Warnings,
Cautions, Notices, or other information contained in the
Sprinter’s manuals.
2018 Interstate
Your Mercedes-Benz Sprinter Van Operator’s and
Warranty Manuals contain important cautions,
warnings, operational, and warranty information on
the Sprinter and its components. All information
in the Sprinter manual should be reviewed and
followed for your safety.
Before leaving the factory, every vital part of the touring
coach is tested for performance. Each test is signed
and certified by an inspector. After the touring coach
arrives on your dealer’s lot, all vital parts and systems
are again tested. When you take delivery of your new
touring coach, you will receive a complete check out.
At that time, a specified list of performance checks on
your touring coach equipment will be conducted, and
any deficiencies you have experienced since taking
delivery will be corrected.
Please contact your dealer if your touring coach needs
service. Major service under your Airstream Limited
Warranty is available through our nationwide network
of Airstream Dealer Service Centers. An up-to-date
list of Dealer Service Centers will be sent to you with
an Owner’s Survey shortly after your touring coach is
delivered. Our website, www.Airstream.com also has a
dealer locator on it. This list is current as of the date of
this publication.
Occasionally, dealerships change or new dealers are
added who may not appear on this list. For this reason,
it is suggested you contact your local dealer from
time to time for an updated list. Additional copies are
available if you need them. All centers operate on an
appointment basis for the utmost efficiency.
When you require service for your touring coach from
the Airstream Factory Service Center or a Certified
Dealer Service Center, please contact the service
manager for an appointment, and inform him if you are
unable to keep the appointment date or wish to change
it. Service may be arranged at the Factory Service
Center by contacting the Service Coordinator at:
Airstream Factory Service Center
428 West Pike Street
P.O. Box 629
Jackson Center, Ohio 45334-0629
Phone: (937) 596-6111 or (877) 596-6111
General Information
Reporting Safety Defects
Touring Coach Equipment and Accessories
If you believe your vehicle has a defect which could
cause a crash or could cause injury or death, you
should immediately inform the National Highway Traffic
Safety Administration (NHTSA), in addition to notifying
Airstream, Inc.
1. Water hose, 5/8-in. high-pressure, tasteless,
odorless, non-toxic (two 25-ft. sections).
If NHTSA receives similar complaints, it may open an
investigation, and if it finds that a safety defect exists
in a group of vehicles, it may order a recall and remedy
campaign. However, NHTSA cannot become involved
in individual problems between you, your dealer, or
Airstream Inc.
4. Power cord adapter, 30-amp capacity.
To contact NHTSA, you may either call the Vehicle
Safety Hotline toll-free at 1-888-327-4236 (TTY: 1-800424-9153), go to http://www.safercar.gov, or write to:
1200 New Jersey Avenue, S.E.
Washington, DC 20590
You can also obtain other information about motor
vehicle safety from http://www.safercar.gov.
2. Y connection - water hose.
3. Holding tank cleaner and deodorizer.
5. 30-ft. electric cord, 30-amp capacity.
6. Wheel chocks.
7. Torque wrench.
8. Quality tire gauge.
9. Verify emergency light kit and is operational.
(Found in driver’s door.)
Motoring Essentials
1. Touring coach registration.
2. Carry driver’s license.
3. In Canada, bring along a non-residence liability
insurance card and your passport.
4. In Mexico, you must have special auto insurance.
5. Carry an extra set of the ignition keys in a separate
pocket or in your wallet.
Suggested Pre-Travel Check List
6. Keep an operating flashlight with fresh batteries in
the glove compartment.
1. Turn off water pump switch.
2. Close windows and vents.
3. Close all interior cabinet doors.
7. Pack the trunk so that you can reach the tools and
spare tire without completely unpacking.
8. Keep sharp or hard articles securely packed.
4. Latch refrigerator door. (Seal containers first.)
9. Do not pack things in the passenger seating area.
You will need the maximum space for comfort.
5. Latch microwave.
10. Wear easy wash, drip-dry traveling clothes.
6. Hold down or securely stack all loose, hard, and
sharp objects.
11. Do not make your vacation trips a mileage
marathon. Stop and relax frequently.
7. Drain toilet bowl.
12. Verify first aid kit provided in passenger door is
complete and up to date.
8. Turn off interior lights.
1. Disconnect and stow electrical hookup cord.
13. Carry your pet’s dish, food, leash, and health and
registration papers.
2. Check exterior lighting.
3. Check torque of lug nuts.
4. Check tires for correct pressure.
5. Adjust vehicle mirrors.
6. Pull forward about 50 ft, test brakes, and check site
for forgotten objects and cleanliness.
2018 Interstate
General Information
Overnight Stop
Extended Stay
In time you will develop a knack for spotting wonderful
little roadside locations by turning off the main highway
and exploring. There are many modern recreational
vehicle parks, including State, County, and Federal
parks with good facilities, where you may obtain
electrical, water, and sewer hookups and connections.
Directories are published which describe in detail these
parks and tell what is available in the way of services
and hookups.
Making a long trip is not very different from making
a weekend excursion. Since everything you need is
right at hand, you are at home wherever you go. When
packing for an extended trip, take everything you need,
but only what you need.
All you need to do to enjoy the self-contained luxury is
1. Turn on LP gas supply and light appliance pilots if
2. Turn on water pump and open faucets until air is
expelled from the system.
Before moving on, turn off the LP gas and water pump.
Check your campsite, both for cleanliness and to be
sure you have not left anything behind. Make sure
everything is properly stowed.
Overnight or Weekend Trips
On overnight or weekend trips, chances are you will
not use up the capacity of the holding tanks. Deplete
the water supply if using the system moderately or
conservatively. You will need to maintain the level of
your battery during this time. If your battery falls to 60
percent capacity, charge the battery by starting your
Frequently depleting the battery below 60%
capacity will shorten its lifespan.
Longer Trips
On a longer trip, when you have stayed where sewer
connections and utility hookups were not available, it
will be necessary for you to stop from time to time to
dispose of the waste in the holding tank and replenish
the water supply. Many truck stops and gas stations,
chain and individually owned, have installed sanitary
dumping stations for just this purpose. Booklets are
available that list these facilities.
When you stop for the night, your Airstream Touring
Coach is built to be safely parked in any spot that
is relatively level and where the ground is firm. Your
facilities are with you. You are self-contained. Try to
pick as level a parking spot as possible.
2018 Interstate
Hook up to water by attaching a ½ -inch minimum highpressure water hose to the city water service.
Plug the 120-volt, 30-amp Electrical Cable into the City
Power Service. Be sure you have the wire grounded
and have the proper polarity.
To use the generator, you simply start it. All switching is
done automatically. The generator can be started from
any of the Multiplex Systems control panels. It is easier
on your generator and appliances if you’ll allow the
generator to reach its normal operating speed (about a
minute) prior to applying heavy current loads.
A Cable/Satellite TV connection is located in the
exterior compartment along with the switches for the
dump valves, macerator pump, and macerator pump
high-pressure hose reel.
Turn on the gas supply. Lighting a top range burner
to bleed any air from the system will make it easier to
start other appliances including the furnace.
When you stay for extended periods where electric
or water hookups are not available, you must make
regular checks on the condition of your 12-volt battery
and the contents of your water tank (Multiplex control
panel or SeeLevel II Monitor Panel). Carry drinking
water in a clean bucket to refill your tank. When your
waste tank nears capacity, move your touring coach to
a dumping location.
When you plan to stay in the same place for several
days, weeks, or months, you will want your touring
coach to be as level as possible. Check the attitude
with a small spirit level set on the inside work counter. If
a correction is necessary, then you must first level from
side to side. This can be done most easily by driving up
a small ramp consisting of 2 in. x 6 in. boards tapered
at both ends. Airstream does not recommend placing
tires in a hole for leveling. Refer to Section 7 - Sprinter
Van for more information on tires.
For units equipped with the optional hydraulic leveling
system refer to Section 6 - Hydraulic Leveling System
for more information.
General Information
Effects of Prolonged Occupancy
Your touring coach was designed primarily for
recreational use and short-term occupancy. If you
expect to occupy the touring coach for an extended
period, be prepared to deal with condensation and
the humid conditions that may be encountered. The
relatively small volume and tight compact construction
of modern recreation vehicles mean that the normal
living activities of even a few occupants will lead to
rapid moisture saturation of the air contained in the
touring coach and the appearance of visible moisture,
especially in cold weather.
Just as moisture collects on the outside of a glass
of cold water during humid weather, moisture can
condense on the inside surfaces of the touring coach
during cold weather when relative humidity of the
interior air is high. This condition is increased because
the insulated walls of a recreation vehicle are much
thinner than house walls. Estimates indicate that two
adults can vaporize up to one-and-a-half gallons of
water daily through breathing, cooking, bathing, and
washing. Unless the water vapor is carried outside
by ventilation or condensed by a dehumidifier, it will
condense on the inside of the windows and walls as
moisture, or in cold weather as frost or ice. It may also
condense out of sight within the walls or the ceiling
where it will manifest itself as warped or stained
panels. Appearance of these conditions may indicate
a serious condensation problem. When you recognize
the signs of excessive moisture and condensation in
the touring coach, action should be taken to minimize
their effects.
Your touring coach is not designed, nor intended,
for permanent housing. Use of this product for
long term or permanent occupancy may lead
to premature deterioration of structure, interior
finishes, fabrics, carpeting, and drapes. Damage or
deterioration due to long-term occupancy may not
be considered normal, and may under the terms of
the warranty constitute misuse, abuse, or neglect,
and may therefore reduce the warranty protection.
To avoid condensation problems, try to follow these tips
to help alleviate excess moisture:
Allow excess moisture to escape to the outside when
bathing, washing dishes, hair drying, laundering, and
using appliances and non-vented gas burners. Always
use an exhaust fan when cooking.
Keep the bathroom door closed and the vent or window
open when bathing and for a period of time after you
have finished.
If you are experiencing condensation, you may want to
reconsider hanging wet clothes in the touring coach to
In hot weather, start the AC early as it removes excess
humidity from the air while lowering the temperature.
Keep the temperature as reasonably cool during cold
weather as possible. The warmer the vehicle, the
more cold exterior temperatures and warm interior
temperatures will collide on wall surfaces, thus creating
Use the ceiling vent to keep air circulating inside the
vehicle so condensation and mildew cannot form in
dead air spaces. Allow air to circulate inside closets
and cabinets (leave doors partially open). Please
keep in mind that a closed cabinet full of stored goods
prevents circulation and allows the exterior temperature
to cause condensation.
The natural tendency would be to close the vehicle
tightly during cold weather. This will actually compound
the problem. Simply put, you need to remove some
of the warm air and allow some cool outside air to get
inside the vehicle so the furnace will not recycle the
humid interior air.
Minimize the use of incandescent lights, which produce
heat and contribute to condensation.
2018 Interstate
General Information
About Molds
Waste Water System
What are molds
The main parts of the waste water system are the
toilet, dual holding tanks, and tank dump valves (see
Section 9 - Maintenance for dump valve information).
The system is designed to provide complete selfcontained toilet facilities, while on the road or parked,
without being connected to a sewage line. It may also
be used when parked while connected to a sewage
Molds are microscopic organisms that naturally
occur in virtually every environment, indoors and
out. Outdoors, mold growth is important in the
decomposition of plants. Indoors, mold growth is
unfavorable. Left unchecked, molds break down
natural materials, such as wood products and fabrics.
Knowing the potential risks is important for any type of
homeowner to protect their investment.
What factors contribute to mold growth
For mold growth to occur, temperatures, indoor or
outdoors, must be between 40°F and 100°F and also,
there must be a source of moisture, such as humidity,
standing water, damp materials, etc. Indoors, the most
rapid growth occurs with warm and humid conditions.
How can mold growth be inhibited
By controlling relative humidity, the growth of mold
and mildew can be inhibited. In warm climates, use
of the air conditioner will reduce the relative humidity.
Vents are located in the bathing and cooking areas
and constant use is advised during food preparation
and bathing, even during colder weather. Additionally,
opening a window during these activities will assist in
ventilation. In extremely humid conditions, the use of
a dehumidifier can be helpful. If using a dehumidifier,
please read and follow all manufacturer instructions
and recommendations to the use and cleaning of the
Frequent use of your touring coach or cleaning
regularly is an important preventive measure. Further,
any spills should be wiped up quickly and dried as soon
as possible. Avoid leaving damp items lying about.
On safe surfaces, use mold or mildew killing cleaning
products. Check sealants regularly, and reseal when
necessary to avoid water leaks. Proper preventive
maintenance to the touring coach and its accessories,
as described both in this manual and in accompanying
literature, will provide the best protection to the touring
2018 Interstate
Keep the dump valves closed with either method and
empty the tanks when they are nearly full. The idea is
to send a large volume of water through the tanks and
hose at the same time to float solids away.
After the sewage tank has been emptied, close the
gate valves and put approximately 5 gallons of water
in the sewage holding tank using the black tank flush
inlet. This will spray the interior of the tank with water
and help prevent solids from building up in the sewage
holding tank. The addition of a deodorizing agent like
Aqua-Kem will help prevent odors.
Should you ever have a buildup of solids, close the
valves, fill the tanks about 3/4 full with fresh water,
drive a distance to agitate the solids, and drain the
Things Not to Put into Toilet or Drains
• Facial tissues (they do not dissolve like toilet paper).
• Automotive antifreeze, ammonia, alcohols, or
• Table scraps or other solids that may clog the drains.
General Information
Drain System (Lounge Models)
Winter Traveling
Traveling in sub-freezing temperatures will require
certain precautions to protect the plumbing system
and your personal belongings from being damaged by
1. Lavatory Drain
2. Black Water Tank (Toilet)
3. Galley Drain
4. Gray Water Tank
Drain System (Grand Tour Models)
Some states do not allow LPG to be turned on while
moving. While traveling in these states, simply use
your common sense. How cold is it? How long will
it be before you can turn the heat back on? Is the
temperature dropping or rising? Remember, when
driving at 50 MPH, the wind chill factor will cause the
interior of the touring coach to cool much faster than a
touring coach that is parked.
1. You must have a plentiful supply of propane gas as
the heat from the furnace warms the touring coach
and keeps the fresh water lines and black water
holding tank from freezing.
2. If your stay is longer than overnight, you should
endeavor to have 120-volt electricity available. The
house battery, fully charged, will not last more than
about 15 hours in freezing weather, less (4 hours)
with use of the tank heating pads. Of course, you
can run your generator to recharge the battery, or
even use the generator continually. Keep an eye
on your LP Gas or engine fuel according to the
type of generator your touring coach is equipped
with. Since the generator starts off the house
battery, it is recommended to start the generator
prior to running the battery down.
3. Minimize use of electricity if 120-volt power source
is not available.
4. Leave cabinet doors, wet bath doors, and
wardrobe doors slightly open at night to allow
circulation of air in and around all components.
1. Lavatory Drain
2. Black Water Tank (Toilet)
3. Galley Drain
4. Gray Water Tank
5. Save 12-volt power by using non-toxic RVapproved antifreeze in gray water holding tank
instead of heating pad to prevent freezing. Quantity
of antifreeze needed will vary with ambient
temperature and the amount of liquids in tank.
6. For extended stays in cold weather, insulate all
water lines outside the touring coach. You should
remember that low temperatures in combination
with high winds cause an equivalent chill
temperature much below what your thermometer is
reading. For instance, with an outside temperature
of zero degrees, and the wind velocity of 10 miles
per hour, the equivalent chill temperature is -20°F.
7. Remember to remove and drain the exterior
shower faucet to prevent freeze damage.
2018 Interstate
General Information
Heated Tanks
As always, safety should be a top priority. Ensure
that you, and everyone traveling with you, can quickly
operate the main door and the emergency exit window
in the dark. Plan for other means of escape in case
these designated exits are blocked.
The escape windows(s) are identified by their red
release handles. To release the escape windows, lift up
on both latches, push on the glass, and swing it clear.
The Interstate Touring Coach has 12-volt heat pads
installed with the fresh and gray water tanks to help
prevent freezing. The tank pads are controlled by either
of the touch screen Multiplex control panels located in
the front or rear of the touring coach. When the outside
temperature is near freezing, simply switch “ON” the
holding tank heaters. Built-in sensors will activate the
heat pads when the contents of the tanks drop to 44°F.
Once the liquid is heated and rises to 64°F the heat
pads will automatically deactivate. Switch the power
“OFF” when the ambient outside temperature remains
above freezing or if the tanks are empty. Battery power
will last about 4 hours unless the unit is plugged into
an external AC power source or the generator is ran
to operate the inverter/charger. To conserve battery
power, RV antifreeze may be used to protect the gray
and black tanks.
The black tank is installed above the floor where
heat from the furnace will keep it from freezing.
Drain and winterize all models if the water systems
are not being used during winter traveling. Refer
to Section 9 - Maintenance in this manual for
winterizing instructions.
2018 Interstate
The window operation should be checked before
each trip and the latches lubricated with silicon
spray or an equivalent lubricant every 3 months.
Read the directions on the fire extinguisher
carefully. If you have any doubts as to its
operation, you and your family should practice,
and then replace or recharge the extinguisher. Your
local fire department will be able to assist you and
answer any questions.
Do not smoke inside the touring coach. Keep
matches out of reach of small children. Do not
clean with flammable material. Keep flammable
material away from open flame. Always shut off the
LP gas at the bottles when fueling a tow vehicle.
We have all heard the above warnings many times,
yet the situations or occurrences they discuss are still
among the leading causes of fires.
Safety information concerning the LPG system of your
touring coach is located in Section 6 - Exterior of this
General Information
2018 Interstate
Section 4
FLOOR PLANS AND SPECIFICATIONS . . . . . . . . . . . . . . . .
FLOOR PLANS. . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Interstate Lounge. . . . . . . . . . . . . . . . . . . . . . . 4-2
Interstate Grand Tour. . . . . . . . . . . . . . . . . . . . . . 4-2
Interstate Grand Tour Twin. . . . . . . . . . . . . . . . . . . . 4-2
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . 4-3
Specification Chart. . . . . . . . . . . . . . . . . . . . . . . 4-3
Specification Tags. . . . . . . . . . . . . . . . . . . . . . . 4-4
Tire Size with Maximum Inflation Pressure Cold . . . . . . . . . . . 4-4
2018 Interstate
Floor Plans And Specifications
Floor Plans
Interstate Lounge
Interstate Grand Tour
Interstate Grand Tour Twin
2018 Interstate
Floor Plans And Specifications
Specification Chart
All weights listed in the Specification Chart are checked and updated throughout the model year.
Your production coach may vary from weights listed.
Interstate Series
Axle Ratio
Exterior Overall Length
Exterior Overall Height
Exterior Overall Width
Interior Height
Interior Width
UBW (Lounge)
UBW (GT Lounge)
UBW (GT Twin)
NCC (Lounge)
NCC (GT Lounge)
NCC (GT Twin)
Tow Capacity
Fuel Tank
Fresh Water Capacity
Gray Water Tank
Black Water Tank
Water Heater (Combination Electric & LPG)
Air conditioner
Refrigerator w/Freezer Box (Lounge)
(12 Volt & 120 Volt)
Refrigerator & Freezer (GT)
(120 Volt)
Generator (LPG)
Batteries (Coach)
Shore Power
Solar Power
Front and Rear Parking Sensors
Bed Size (Lounge)
Bed Size (GT Twin)
Airstream Warranty
Mercedes-Benz® Warranty
Mercedes-Benz® Engine Warranty
2018 Interstate
All Models
Mercedes-Benz® Sprinter 3500 Extended
Mercedes-Benz® 3.0L V6 Turbo Diesel
BlueTEC SCR Technology, 50 States - EPA/
CARB Standards
188 HP/325 lbs Torque
5 Speed Automatic
18+ Estimated Highway
24’ 4.5”
9’ 8” (with Antenna)
6’ 7.7”
6’ 2.25”
5’ 10”
11,030 lbs
15,250 lbs
9,087 lbs
9,110 lbs
8,744 lbs
1,943 lbs
1,920 lbs
2,286 lbs
Up To 5,000 lbs
24.5 gallon
26 gallon
27 gallon
13 gallon (GT 14 gallon)
14.55 gallon
60,000 BTU On-Demand
13,500 BTU
16,000 BTU
4 x 4 Option
Mercedes-Benz® Sprinter 3500 Extended
Mercedes-Benz® 3.0L V6 Turbo Diesel
BlueTEC SCR Technology, 50 States - EPA/
CARB Standards
188 HP/325 lbs Torque
5 Speed Automatic
18+ Estimated Highway
24’ 4.5”
9’ 8” (with Antenna)
6’ 7.7”
6’ 2.25”
5’ 10”
11,030 lbs
15,250 lbs
9,387 lbs
9,410 lbs
9,044 lbs
1,643 lbs
1,620 lbs
1,986 lbs
Up To 5,000 lbs
24.5 gallon
26 gallon
27 gallon
13 gallon (GT 14 gallon)
14.55 gallon
60,000 BTU On-Demand
13,500 BTU
16,000 BTU
3.1 cubic feet
3.1 cubic feet
5.0 cubic feet (Fridge)
1.6 cubic feet (Freezer)
1.2 cubic feet
2 Burner with Integrated Cover
2.5 kW
(2) Deep Cycle Maintenance Free Group 24
50-Amp Charger, 1,000 Watt Inverter
30-Amp/120-Volt Service
300 Watt (3 - 100 Watt Panels)
70” X 82”
27” X 74”
3 Years/36,000 Miles
3 Years/36,000 Miles
5 Years/100,000 Miles
5.0 cubic feet (Fridge)
1.6 cubic feet (Freezer)
1.2 cubic feet
2 Burner with Intergrated Cover
2.5 kW
(2) Deep Cycle Maintenance Free Group 24
50-Amp Charger, 1,000 Watt Inverter
30-Amp/120-Volt Service
300 Watt (3 - 100 Watt Panels)
70” X 82”
27” X 74”
3 Years/36,000 Miles
3 Years/36,000 Miles
5 Years/100,000 Miles
Floor Plans And Specifications
The Unit Base Weight (UBW) and Net Carrying
Capacity (NCC) weights listed in the Specification
Chart are for the base unit with no options and fluids.
The Vehicle Manufacturing tag lists the size of tires
and wheel rims, maximum cold inflation pressures, the
Vehicle Identification Number (VIN), and GAWR.
Gross Vehicular Weight Rating (GVWR) is the
maximum permissible weight of this touring coach
when fully loaded. It includes all weight at the touring
coach axle(s).
For a complete list of capacities, see the Specifications
Chart on the previous page.
UBW is the dry weight of the base unit without options.
NCC is equal to GVWR minus UBW. Gross Axle
Weight Rating (GAWR) is the value specified as the
load carrying capacity of a single axle system, as
measured at the tire-ground interfaces.
Specification Tags
For precise cargo capacity, refer to the Cargo-Carrying
Capacity tag on the inside of the door. The WEIGHT
shown on the tag, which is the maximum weight of
cargo you can load and carry in your specific touring
coach as built with its options.
Located on the front roadside of your touring coach are
the Tire and Loading, and Vehicle Manufacturing tags.
The Tire and Loading information tag lists the Size and
Cold Inflation Pressure of the tires on your vehicle, the
weight of your touring coach as manufactured, and the
Tire Size with Maximum Inflation Pressure
• LT 215/85R16 - 61 psi
2018 Interstate
Section 5
INTERIOR ���������������������������������������������������������������������� 5-1
ELECTRICAL ���������������������������������������������������������� 5-8
12-Volt System����������������������������������������������������� 5-8
Ultra Leather��������������������������������������������������������� 5-3
12-Volt Operation �������������������������������������� 5-8
Impala Suede������������������������������������������������������� 5-3
Power Center������������������������������������������������������� 5-9
Cabinets And Overhead Lockers ������������������������� 5-3
Auxiliary Fuse Locations ��������������������������� 5-9
Aluminum Interior Roof Skin��������������������������������� 5-3
Multiplex System�������������������������������������������������� 5-9
Counter Area�������������������������������������������������������� 5-3
Systems Controlled By Firefly����������������� 5-10
Sinks��������������������������������������������������������������������� 5-3
Ceiling And Directional Lighting��������������� 5-10
Vinyl Flooring ������������������������������������������������������� 5-4
120-Volt Power����������������������������������������������������5-11
General Cleaning �������������������������������������� 5-4
Energy Management System (EMS) ������������������5-11
Polishing The Flooring ������������������������������ 5-4
Circuit Protection��������������������������������������5-11
Wet Bath �������������������������������������������������������������� 5-4
Operation �������������������������������������������������5-11
Telephone Shower Head��������������������������� 5-4
Display Panel����������������������������������������������������� 5-12
Retractable Clothesline����������������������������� 5-4
Service ���������������������������������������������������� 5-12
Toilet��������������������������������������������������������������������� 5-5
Status������������������������������������������������������� 5-12
Deodorizers����������������������������������������������� 5-5
120-Volt Automatic Switch Over Box ����������������� 5-12
Faucets����������������������������������������������������������������� 5-5
Generator/City Power ����������������������������� 5-12
Lavatory Faucet����������������������������������������� 5-5
Battery Disconnect Switches ����������������������������� 5-13
Galley Faucet��������������������������������������������� 5-5
Manual Disconnect Switch����������������������� 5-13
Faucet Cleaning And Care������������������������� 5-5
Multiplex System Disconnect Switch������� 5-13
Driver And Passenger Seats�������������������������������� 5-6
Battery Separator����������������������������������������������� 5-13
Captain’s Chairs, Second Row����������������������������� 5-6
Protecting The Charging System ������������ 5-13
Rear Lounge/Bed������������������������������������������������� 5-6
Monitor Panel����������������������������������������������������� 5-14
Pedestal Table ����������������������������������������������������� 5-6
Inverter/Charger������������������������������������������������� 5-14
Collapsing Clothes Rod ��������������������������������������� 5-7
Converter ������������������������������������������������ 5-14
Privacy Sun Shades��������������������������������������������� 5-7
Power Shades ����������������������������������������������������� 5-7
Storage Tips��������������������������������������������������������� 5-7
2018 Interstate
Section 5
120-Volt Electrical System ��������������������������������� 5-15
Exhaust Fans����������������������������������������������������� 5-19
City Power����������������������������������������������� 5-15
High Volume Roof Vent��������������������������� 5-19
Ground Fault Circuit Interrupter��������������� 5-15
Thermostat And Rain Sensor������������������� 5-19
GFCI Receptacle Test����������������������������� 5-16
Cleaning Instructions������������������������������� 5-19
GFCI Breaker Test����������������������������������� 5-16
Furnace�������������������������������������������������������������� 5-20
ENTERTAINMENT SYSTEMS������������������������������� 5-16
Microwave Ovens����������������������������������������������� 5-20
TV Antenna �������������������������������������������������������� 5-16
Range ���������������������������������������������������������������� 5-20
Cleaning Antenna Housing ��������������������� 5-16
Refrigerator/Freezer������������������������������������������� 5-20
TV, Blu-Ray, And Navigation System����������������� 5-16
Operation ������������������������������������������������ 5-20
Privacy Disclaimer����������������������������������� 5-17
Start Up��������������������������������������������������� 5-20
TV Wall Plate Power Supply������������������������������� 5-17
Defrost And Cleaning������������������������������� 5-20
Operation ������������������������������������������������ 5-17
SeeLevel II Monitor Panel���������������������������������� 5-21
Satellite Antenna Pre-Wiring������������������������������� 5-17
To Read A Water Or
Sewer Tank Level������������������������ 5-21
Roof Mounted Satellite���������������������������� 5-17
Portable Satellite Antenna����������������������� 5-17
APPLIANCES�������������������������������������������������������� 5-18
Maintenance������������������������������������������������������� 5-18
Air Conditioner ��������������������������������������������������� 5-18
To Read The Battery Voltage������������������� 5-21
To Program The LED Brightness ������������ 5-21
Solar System ����������������������������������������������������� 5-22
Water Heater ����������������������������������������������������� 5-22
2018 Interstate
General Information and Cleaning
The interior of each Airstream Touring Coach has been
designed for comfort, convenience, durability, and
appearance. How you use it and how you take care
of it, naturally, depends on you. However, if you learn
to operate the interior components and take care of
them and the touring coach properly, this knowledge
will add to your pleasure, as well as the long life of your
touring coach. All material should be professionally dry
cleaned to remove any overall soiled condition.
Ultra Leather
Spot clean regularly with mild soap and water. For
stubborn stains, wipe with isopropyl (rubbing alcohol)
as soon as possible. Sanitize using a disinfectant such
as a 5:1 water/bleach solution. Air dry or dry quickly
with a hair dryer on warm setting.
Never remove cushion covers for separate dry
cleaning or washing. Any tumble cleaning method
can destroy the backing, and/or shrink or otherwise
damage upholstery fabric.
Aluminum Interior Roof Skin
The metal interior skin on the ceiling is coated with
a baked-on acrylic coating. Use soft rags or wash
mitts always moving lengthwise with the grain of
the aluminum. NEVER rub hard on the coating. Oil,
grease, dust, and dirt may be removed by washing with
a 5 percent solution of commonly used commercial and
industrial multi-purpose detergent in water. Cleaning
should be followed by a thorough clean water rinse.
Drying the metal with a chamois or a soft cloth may
prevent spots and streaks. When washing or waxing
the metal, always wipe “with” the grain of the metal. A
good grade of nonabrasive automotive paste or liquid
wax once a year will increase the life of the finish.
If a substance is found on the coating that cannot be
removed by normal washing procedures, Airstream
recommends using DX 330 Acryli-Clean made by PPG
Industries. Follow all directions and Warnings on the
product container. Acryli-Clean should be used by
trained personnel only, using the proper equipment
under controlled conditions. Use the Acryli-Clean as
sparingly as possible to remove oil or grease. Rinse
with cool water immediately after use.
Impala Suede
Any excessive spills should be blotted up quickly after
the spill occurs. Using a clean cloth or paper towel,
wipe gently. Do not soak fabric with the cleaning
solution. Use wet wipes or a cloth dampened with
water. Gently wipe the affected area. For more
stubborn stains a solution of 95 percent water and
5 percent dish soap can be used. More persistent
stains may take a second treatment after allowing the
fabric to dry or a solution of Ninety-one percent Isopryl
Alcohol. This product is extremely durable with special
stain-resistant materials for easy soap and water cleanup.
Cabinets and Overhead Lockers
The furniture is manufactured from a high-pressure
laminate and can be cleaned with soap and water,
or you can use a common solvent on tough spots.
Furniture polish can be used sparingly. Plexiglass
doors must be cleaned with a anti-static cleaner and
cloth. Windex or common ammonia products will
damage the coating on the surface.
Do not use any abrasive material, abrasive
cleaners, cloths and pads as there is the possibility
they could scratch the surface. A protective pad
should always be placed under hot utensils.
2018 Interstate
Abrasive polishes or cleaning solvents such as
automatic dishwasher or acid etch cleaners are
too strong and should never be used. Rinse all
grit from surface prior to washing. Use soft rags
always moving lengthwise with the unit. NEVER
rub with excessive pressure on the coating. Even
the softest rag will damage the coating if excessive
pressure is applied.
Counter Area
Your Airstream is equipped with Corian® countertops
which can be cleaned with common household
cleaners. For most residues use warm soapy water or
an ammonia-based household cleaner; rinse and wipe
dry. For stubborn residue spray with Deep Cleaner
from Stone Care International; wait 30 seconds
and wipe dry with a paper towel. For disinfecting
occasionally wipe the surface with a solution of 5Tbsp.
Bleach/1 gallon water mix. Rinse top thoroughly with
water and wipe dry.
Cleaning can be accomplished using a mild liquid
detergent on a soft cloth. A complete home owner’s
guide for your sinks is supplied in your owner’s packet.
Please read these instructions before use.
Vinyl Flooring
Wet Bath
General Cleaning
To clean your fiberglass shower stall unit, use warm
water and a liquid detergent. Do not use abrasive
cleaners; they may scratch and dull the surface of your
fiberglass unit. Stubborn stains can be removed with
solvents such as turpentine, paint thinner, or acetone.
Restore dulled areas by rubbing with an automotivetype liquid cleaner, and then put the soft glow back
into the sides of your unit with a light application of
liquid wax. DO NOT wax the shower bottom as it may
become slippery leading to a fall.
Use a soft broom to sweep the floor. A vacuum cleaner
may damage the flooring, especially the type that use
beater bars. In most cases, a clean damp cloth or mop
will suffice to clean dirty flooring. When necessary, a
solution of mild detergent or domestic floor cleaning
emulsion can be used to clean the flooring. Do not use
a wire brush or nylon scouring pads, furniture polish,
spirit-based polish, powder or liquid abrasive cleaners,
bleach or other strong detergents. Scuffs, dirt, and
spillages should be cleaned up as soon as possible.
Rubber backing on doormats may result in yellow
discoloration of the floor immediately beneath. Choose
a natural fiber mat. Rubber feet on furniture may cause
staining. Remove them altogether or place coasters or
felt pads between them and the floor.
Polishing the Flooring
Cushioned floors that have an additional protective
coating such as Beauflor Premium Protect, Multi
Protect and Ultragrip, do not normally require polish.
Other floors (Bartoli/Lioni) will require polishing to
protect the floor’s surface from staining agents and
give a surface shine. For these, apply a liquid emulsion
floor polish immediately after installation and thereafter
at 6 to 12 monthly intervals as required. Always follow
the manufacturer’s instructions when using a floor
polish or cleaner and ensure it is suitable for use with
cushioned vinyl flooring.
Applying wax to the base of the shower floor is
not recommended, as this could create an unsafe
Telephone Shower Head
The telephone shower head is designed to give
maximum flexibility in usage, and provides for watersaving techniques when using your touring coach on
self-containment. It can be held in the hand and moved
about the body. Normally, the best water conservation
procedure is to wet the entire body and then turn the
water off. Apply soap, lather thoroughly, and then rinse
the soap off.
Retractable Clothesline
A retractable clothesline and line hook is installed for
your convenience in the shower stall.
2018 Interstate
The touring coach toilet in your Airstream is a design
that has been used for many years.
Lavatory Faucet
To flush, press the foot pedal, holding the pedal down
until all solids have cleared. To add water press the
pedal halfway. When you wish to conserve water, hold
the hand-spray head over the bowl and hold down the
thumb-operated lever. When depressing the pedal, all
the water is routed through the hand-spray.
When you dump the bowl of the toilet, make
sure all paper and solids have cleared the slide
mechanism before you allow it to close. Failure
to do so can cause the groove for the slide to
become jammed and the slide will no longer close
Please see the toilet owner’s/user manual for warranty
and user tips, and maintenance information.
Airstream Part #602251
ITC, Inc.
Galley Faucet
There are many deodorizers on the market in tablet,
liquid, and powder form. These not only combat odor,
but also stimulate the bacteria that works to dissolve
the solids in your tank.
Airstream Part #602197
Faucet Cleaning and Care
All that is needed to clean your faucet is a soft, damp
cloth. Airstream does not recommend the use of scour
pads, cleansers, or chemicals. The abrasive nature of
these substances could damage the faucet’s finish. A
non-abrasive car wax will help to protect the finish.
2018 Interstate
Driver and Passenger Seats
Rear Lounge/Bed
The driver and passenger heated seats are provided
by Sprinter, sent out to be recovered by Airstream to
match the interior decor.
The rear jackknife seats and center lounge can be
converted into a sleeping area by first pulling out the
aluminum extension, lowering the pillow extenders,
and removing the headrests. Press and hold the
switch located under the passenger side overhead
storage locker until the lounge flattens completely. This
same switch will be located on the driver’s side in the
Grand Tour model. Finally, lift up and pull out on both
the jackknife seats to lower into a flattened position.
Make sure to raise the galleys countertop extension to
prevent damage while converting the jackknife seat.
The seat adjustment mechanism provided by Sprinter
allows the seat to be moved forward or backward and
swivel left or right. A release bar under the front of the
seat is used to move the seat forward and backward.
Pressing down on a handle centered under the front of
the seats allows the seat to swivel. Return seat to full
upright position before using swivel adjustment. The
heated seats are activated by dash-mounted switches.
Lumbar and other seat adjustments are part of the
reupholstered Sprinter seat and their operation is
explained in the Sprinter manual.
Adjust the driver’s seat so that you can easily
reach and operate all controls. Make sure the seat
is locked in position. Do not adjust driver’s seat
swivel or fore and aft mechanism while vehicle
is moving. The seat could move unexpectedly
causing loss of control.
Captain’s Chairs, Second Row
The captains chairs have three adjustments. A lever on
the side of the seat reclines the seat back. A lever on
the seat pedestal under the front of the seat allows the
seat to be adjusted forward or back, and a lever on the
pedestal under the side of the seat allows the seat to
swivel. Return seat to full upright position before using
swivel adjustment.
Seat backs on cab and second row seats must be
returned to full upright position and seat moved
forward before seat is swiveled. Failure to do so
could result in damage to the seats upholstery, the
wall panels, and the seats decorative skirt.
Keep your furniture and family safe from fires
caused by careless smoking. Do not smoke when
drowsy. Remove immediately any flowing ash
or a lighted cigarette which falls on furniture.
Smoldering smoking material can cause
upholstered furniture fires.
Pedestal Table
Interstate Touring Coach’s are equipped with a
pedestal table. The top is stored between the galley
and the captains chair. The pedestal leg is stored
behind the rear center sofa on the rear lounge model
accessed by opening the rear cargo doors. On twin
bed models the pedestal leg is stored inside the
roadside wardrobe. The pedestal table can be installed
in the floor mounted threaded holders located between
the dinette seats or behind the cab captains chairs.
The pedestal leg is inserted into the floor cups and
twisted to lock into place.
Return table top and pedestal to their respective
storage positions before moving the vehicle. In a
emergency stop or accident the top and pedestal
could cause personal injury and/or death.
2018 Interstate
Collapsing Clothes Rod
Power Shades
All Interstate models come with power shades
controlled by the Multiplex Systems touch screen
control panels located in the front and rear of the
touring coach. The shades feature a mechanical limit
switch to prevent accidental loss or change of limits
due to power surges or power outages. The shades
will retain their pre-set limit stops even if the shade is
pulled down manually by mistake. These presets are
set at Airstream and shouldn’t need adjusted.
A collapsing clothes rod is located below the rear
overhead, behind the rear lounge/bed.
Privacy Sun Shades
The multiplex panels allow for control over individual
shades as well as a master control button to raise or
lower all the shades at once. Pressing either the up or
down arrow next to the shade you want to control will
raise or lower the shade. If the same arrow is pressed
before the shade reaches its pre-set limit stop the
shade will stop at its current position.
Refer to the Power Shades owner’s manual for tips on
Privacy shades are provided for the front windshield
and driver/passenger cab windows. The shades have
magnets sewn into them that attach to the van.
Light brushing with an upholstery brush or gentle use
of a vacuum cleaner will suffice in most situations. For
heavy soiled conditions dry clean only. Washing the
shades may void the warranty.
Storage Tips
Galley cabinets should have the heaviest items
stored on the bottom and lighter items overhead. After
loading, put skillets and canned goods on the floor or
bottom shelf, and cereals and crackers in the overhead
roof locker. Use unbreakable-type plates and saucers,
and consider storing your dish towels around them.
Clothes hung in wardrobes should be kept on hangers
that snap over the clothes rods to keep them from
bouncing off on rough roads. Evening dresses should
be kept in plastic bags similar to those dry cleaning
businesses use. Dust will work its way into the touring
coach and soil clothes. Try to avoid large bulky coats.
Layers of lighter clothing will usually keep you warmer,
are more versatile, and are easier to store.
Keep flammable material away from the furnace.
2018 Interstate
12-Volt Operation
12-Volt System
The major portion of electrical power in your Airstream
is 12 volt. The 12-volt current powers almost every
thing except the roof A/C, water heater, 120-volt
receptacles, and microwave oven. However, some of
these appliances have 12-volt electronic boards.
All 12-volt current is routed to a 12-volt pass-through
power stud mounted on the battery box. The power
stud is the hub of the 12-volt system. It ties together
the inverter/charger, house battery, and battery
Power from the stud goes to a buss bar with four
breaker positions holding Type 2 thermal breakers.
The thermal breakers feed the rear lounge motor, the
tank heater pads, and the battery disconnect switch.
A position is left open to add a breaker for an optional
solar panel.
Power is routed from the battery disconnect switch to
the 12-volt distribution panel and through its branch
circuits to the rest of the touring coach.
Thermal breakers break contact when overheated
by a short or overload in the wiring. These
breakers automatically reset when cooled down.
A breaker continually overheating and breaking
contact should be investigated by a qualified
service technician.
The only thing you have to do is make sure the house
battery does not run down. In normal usage this
shouldn’t be a problem since you would normally be
plugged into an external AC power source at night or
when camping. When you’re plugged into shoreline
power or running the generator the inverter/charger
charges the battery and carries much of the load.
Some nights you may not find a place to plug into
city power. This should not be a problem; you can
comfortably run your lights, water pump, and vents in a
normal fashion without depleting the battery.
If you are not plugged into city power, and you plan
on staying longer than a day or two, you’ll want to
conserve your battery by using as few lights and
appliances as possible. Check the monitor system
regularly. If you notice the lights becoming dim, it’s
much easier on the battery if you start the generator or
run the chassis engine before the battery runs down.
The generator starts from the house battery. If the
house battery becomes depleted, the chassis engine
can be started to charge it. It should only take a few
minutes before the generator will start.
The engine battery and house battery are isolated from
each other by the Battery Separator, preventing the
two systems from drawing down simultaneously. They
will connect through the separator if charging from the
engine, generator, or inverter/charger is detected.
2018 Interstate
Power Center
5. Dash radio: Thermal fuse in box under the
roadside jumper seat.
6. Rear view camera: 1.5-watt in-line fuse under
drivers seat. (#11 fuse)
7. Thermostat display: Fused to 5-amp breaker on
side of furnace
All Interstate models have the power center installed at
the base of the drivers side rear jumper seat. Open the
decorative door for access to 12-volt fuses and 120volt breakers.
The power center is a completely self-contained
120-volt power distribution and energy management
system intended to be used in recreational vehicles. It
is housed in a sheet metal enclosure with a removable
front panel. It provides circuit protection for all the
120-VAC loads in the touring coach and works with the
Energy Management System to minimize the overloading and tripping of circuit breakers.
Refer to Section 9 - Maintenance for important battery
maintenance information.
The power center is a centralized power switching,
fusing, and distribution center. The potential
of lethal electrical shock is present in this box.
Inadvertent shorts at this box could result in
damage and/or injury. All servicing of this box
should be done by a qualified Service Technician.
Auxiliary Fuse Locations
In addition to the 12-volt fuses and breakers described
in this section, some components have additional
fuse protection as supplied or required by their
manufacturer. These locations include:
1. LP detector: 2-amp fuse behind detector
2. Battery Separator power line to engine battery:
150-amp in-line fuse inside Sprinter battery
compartment under the driver’s floorboard
3. Monitor panel battery voltage display: under the
roadside jumper seat. (1 amp)
4. Inverter: 150-amp in-line fuse under the roadside
jumper seat.
2018 Interstate
Most fuses will require a qualified technician
to access and replace. Contact your dealer or
Airstream Service Center.
Multiplex System
The Multiplex System provides advanced automation
and mobile electrical solutions for your touring coach.
Firefly is a multiplex network system designed to
combine multiple signals across a media to reduce
wires and simplify end user control. The system
combines all desired functions and controls of the
touring coach into a central location. Regional control
panels are installed to operate specific areas.
The switch panels conveniently located throughout the
touring coach allow you to turn your lighting on or off,
as well as, the ability to dim lighting to a desired level
with the touch of a button. Each button is illuminated,
when it is pressed, indicating the circuit is either ON or
OFF. The button will turn white when the circuit is OFF
and blue when it is ON.
Buttons that are controlling circuits such as Light
Master and Panel Lights typically Do Not change
from blue to white.
The Light Master button allows you to instantly turn
ON or OFF all lighting in the interior of your touring
coach. Pressing the Light Master ON button will turn
on only the lights that were on when Light Master OFF
was pressed. Holding the button ON for more than 1
second will turn on all the interior lighting.
Pressing the Light Master ON after the Light Master
OFF button has been held or pushed twice will
result in no response. Hold ON to resolve.
When dimming it is normal for LED lights to flicker.
Lights should return to normal once they are set to
a desired brightness.
Systems Controlled By Firefly
Ceiling and Directional Lighting
• All lights (inside and outside)
All lighting in the Airstream Interstate is LED and most
will require a replacement fixture should it go out or
malfunction. Lighting can be operated from multiple
control panels connected to the Multiplex System.
The main touch screen control panel is located in the
front roadside roof locker. The Circuit Control Board is
located below the curbside jumper seat. Other control
panels located throughout the touring coach include;
on the wall at the entry door, and in the rear lounge
area. These panels control an array of lighting in their
respective locations, as well as, the power shades, roof
vents, rear screen, and water pump.
• Power awning and awning lights
• Shades
• Roof vent
• Climate
• Generator
• Tank monitoring (Fresh, Black, Grey and LPG)
• Battery voltage
• Water heater
• Tank heaters
• Water pump
The following panel displays are examples of the
secondary screens of the main control panel and are a
reflection of what might be displayed when an option is
The Multiplex System is self resetting should a circuit
trip. The system should never need reset by the owner
for any reason. If the main control panel or remote
panels are not operating this could indicate a short in
the wiring and should only be serviced by a certified
Examples of the regional control panels are shown
below. Refer to Section 8 - Maintenance for wiring
Several Multiplex control panels are installed
throughout the touring coach. Many fixtures can
be operated on multiple control panels. However,
some of the fixtures they control are unique to the
area in which they are located. For best use of the
Multiplex System Airstream recommends learning
the functions of each individual panel. Refer to the
owner’s manual provided for tips and information
on how to use the system.
2018 Interstate
120-Volt Power
When you’re plugged into shoreline power or starting
your generator, 120-volt current is fed to an Automatic
Switch Over Box. Power from the box runs to the
120-volt circuit breakers on the Energy Management
Make sure to read, understand, and follow all
electrical component owner’s manuals provided
in the owner’s packet before operating the touring
coach. Observe all operating instructions and
Warnings as well as all recommended maintenance
schedules and procedures.
Energy Management System (EMS)
The Energy Management System is located in the front
locker behind the drivers seat. A complete, detailed
EMS manual is included with your owner’s packet.
The ENERGY MANAGEMENT SYSTEM controls 120volt operated circuits to help keep the total 120-volt
current draw to less than 30 amps. When operating
on generator power the 120-volt draw will be less than
20 amps. These circuits may be any type load, but
are typically heavier loads, those whose use can be
“postponed” until a time when current is available for
their use.
Circuit Protection
Circuit protection for ALL 120 VAC loads are standard
residential resettable circuit breakers install in the
Power Center (120 VAC section). Airstream has preinstalled the correct breakers per RVIA (NEC) listing
requirements for the touring coach. The MAIN breaker
for the touring coach is 30 amp and feeds the branchbreakers in the breaker box. Shutting off the MAIN
breaker will remove power to all branch loads, except
for receptacles on the Inverter circuit when the inverter
mode is “ENABLED”. The Inverter/converter contains a
resettable 20 amp input breaker and a 15 amp output
breaker. The remaining power center branch-breakers
feed individual loads and are defined by the label
affixed next to the breakers. The source for 120 VAC
power to the Power Center can come from either the
Shoreline plug when connected to a camp site or the
coach’s own generator when running. If both sources
are “ON” the power feed to the Power Center will be
coming from the generator.
2018 Interstate
The main and general load branch-breakers are
operated similar to a light switch with up as “ON” and
down as “OFF”. If an overload condition or a short
occurs the switch will snap to the “OFF” position.
The load for this breaker will now be “OFF”. Before
resetting the breaker be aware of any device that may
have been plugged in or turned “ON” which may have
cause the breaker to overload. Unplug or turn “OFF”
the possibly faulty device before resetting the breaker.
To reset the breaker, firmly push the breaker switch
to the “OFF” position then back to the “ON” position.
If the breaker snaps back to the “OFF” position while
resetting a fault condition still exists and should be
serviced by a qualified Service Technician. If the
breaker stays “ON” but snaps back to “OFF” after
plugging in or turning ON the possibly faulted device a
fault condition may exist in that device and should be
service by a qualified Technician.
The power center Ground Fault Interrupt Circuit (GFIC)
breaker is a special breaker that will provide additional
safety to the occupants of the touring coach on the
following receptacles; external, galley, lavatory, and
entertainment. In addition to short circuit and overload
protection the GFIC will shut off the breaker if any
current feeding out of the breaker does not return to
it. As in the case of a person contacting the electrical
energized part of the GFIC circuit and an electrically
conductive object not associated with the circuit.
Refer to to Ground Fault Circuit Interrupter and GFCI
Breaker Test in this section for more information.
In operation, when 120 VAC and 12 VDC are initially
applied, the system will energize the relays at one
second intervals, closing the normally open contacts
on each of the five relays while monitoring the total
current. If the total should exceed the service limit, the
system will turn off the last load that was turned on. As
it does this, it calculates the amount of current that was
removed, which is the value for that load. This value
is placed in memory. The system has “learned” the
amount of current that particular appliance draws. This
feature compensates for the difference in current draw
over a range of line voltage and ambient temperature,
by relearning the load each time it is turned off.
The system now waits until the total current is lower
than the service limit, by the amount in memory, before
it will turn that load back on. This ensures that there is
sufficient current to operate the load.
Display Panel
The display panel requires little user interaction
and is provided to help the user understand power
management. The display monitors the total AC current
of the touring coach and prevents circuit breaker
tripping by momentarily shedding loads. As additional
appliances are turned on the system will begin to shed
loads. As appliances are turned off, and a minimum of
two minutes has expired, the system will automatically
restore power to each of the shed loads.
120-Volt Automatic Switch Over Box
The switch over box automatically switches the 120volt feed to the Energy Management System Module
from shoreline to generator and back as you choose
which way to power the touring coach. You simply
decide whether to plug into a 120-volt shoreline or
start the generator and the box will do the rest. If the
generator is accidentally started while plugged into
shoreline the box will sense the generator incoming
power, contact points inside the box will switch
cutting the shoreline connection, and establishing the
generator connection. This protects the system from a
possible overload from dual power sources.
Generator/City Power
The “Select” button allows the service type to be set
to either 30 amp or 20 amp, to match the incoming
When power is first applied, the system will be in the
30-amp mode and the screen will display “Service
30A”. Momentarily pressing the “SELECT” button will
switch the system to the 20-amp mode. Momentarily
pressing the button again will switch the system back
to the 30-amp mode.
Press the “SELECT” button to switch to 20-amp service
if it is necessary to use a 20-amp adaptor or you know
the shoreline power is 20 amp, The screen will display
“Service 20A”.
The generator supplies 20-amp service and is set to
switch the system automatically to the 20-amp mode
whenever the generator is the power source. The
screen will display “Generator 20A” when the generator
is supplying power.
The Display Panel is protected by a 5-amp automotivetype fuse located under the EMS 120-volt Distribution
Panel cover. Remove four screws from the cover to
access the fuse.
The roof A/C and microwave are set at the factory to be
the controlled circuits and are shed in this order.
This means if a power hungry appliance is plugged
into an outlet and the system begins to use more than
30-amps it will begin to shed loads and will shut off the
a. To Energy Management System module main
b. From generator
c. From shoreline
1. When plugged into shoreline power, the current
path is from C to A.
2. When you start your generator, the points switch
and the power flow is from B to A. Stopping the
generator releases the points back to shoreline
3. If you’re plugged into shoreline and you start the
generator, the points still switch since the generator
has the priority, so the current flow is still B to A.
Make sure to read and understand all electrical
Component owner’s manuals provided in the
owner’s Packet before operating the touring coach.
Observe all operating instructions and Warnings as
well as all recommended maintenance schedules
and procedures.
2018 Interstate
Battery Disconnect Switches
Manual Disconnect Switch
The manual disconnect switch, located at the base of
the drivers side rear jumper seat behind the decorative
access door, is used to turn off power from the battery
to the 12-volt distribution panel. Push knob in before
manually rotating it to the ON/OFF position.
The manual disconnect switch can be used to
completely disable the main disconnect switch by
over rotating the switch in the ON/OFF positions till
a click is heard. The disable OFF feature is useful
for long term storage of the vehicle where the main
disconnect switch could be turned on and the batteries
accidentally drained. Likewise, the Disable ON feature
is useful while camping when the main disconnect
switch could be turned off cutting power to appliances.
The holding tank heat pads, rear lounge motor, solar
panel, and generator are not connected to the 12-volt
distribution panel and are wired direct in through the
thermal breakers. The main disconnect will not disable
these systems.
Multiplex System Disconnect Switch
If the touring coach is NOT plugged into an external
AC power source and the switch is turned to OFF the
batteries are disconnected and the 12-volt distribution
panel will not receive power from the converter. The
converter will not charge the batteries with the switch
in the OFF position with no shoreline power present.
The OFF position is intended for storage of the touring
coach or when power conservation is desired.
The solar panels will charge the batteries regardless of
the battery disconnect switch position. Likewise, if ON
or OFF, the generator will charge the batteries.
As a safety precaution, the electric gas shut-off
solenoid closes automatically when 12-volt power
is disconnected, cutting gas to appliances. It will
reopen when power is restored.
Battery Separator
The Battery Separator is located at the base of the
drivers side rear jumper seat, and is accessed by
opening the decorative door. It is designed as a
solenoid priority system to protect the chassis charging
system from excessive loading, while allowing house
batteries to be maintained by the Sprinter charging
Protecting the Charging System
The Battery Separator monitors the battery system
to determine if the batteries are being charged. The
charging can be accomplished through the inverter/
charger or the engine charging system. When the
engine battery or house batteries are charging, the
Battery Separator will engage, joining the two battery
banks. If charging ceases and voltage decreases in
either bank, the Battery Separator will disconnect the
two banks from each other, protecting the banks from
being discharged simultaneously.
The battery disconnect switch located on the multiplex
panel at the entry door is used to separate the 12-volt
distribution panel from the converter charging system.
When connected to an external AC power source, the
12-volt distribution panel will receive power from the
converter and the touring coach will function normally.
The batteries will be charged through the converter
charging system regardless of if the battery disconnect
switch is in the ON/OFF position.
2018 Interstate
In the event the engine battery is depleted, Sprinter
recommends using a trickle charge only when
charging the battery. When jumping the engine
battery, do not use a power boost. Read and
follow battery charging procedures in the Sprinter
Owner’s manual.
Monitor Panel
An extensive owner’s manual for the Inverter/
Charger is provided in the Airstream Owner’s
Packet. Make sure to read, understand, and follow
all information, notes, Cautions, and Warnings in
the manual before operating the Inverter/Charger.
The “Home” screen of the Multiplex Systems main
control panel displays the fluid levels of the Black
Water, Grey Water, Fresh Water, and the LP gas tanks.
The panel also shows the voltage status of the main
(chassis) and the auxiliary (house) batteries.
The fluid monitoring system has been calibrated at the
factory for the size tanks the touring coach uses and,
therefore, should never need another calibration.
The Inverter/Charger is a DC to AC inverter and a 50amp multi-stage battery charger. The remote control
module is mounted in the front locker behind the
drivers seat.
The Inverter/Charger charges the batteries and
converts 12-VDC to 120-VAC current for distribution
to the entertainment devices. To operate your
entertainment circuit the inverter must be ON, unless
connected to generator or shoreline power.
If power is not needed to the entertainment circuit
make sure the inverter is turned OFF to conserve
battery power. The inverter will have a slight power
draw even when turned off but the power consumption
will be even greater if left on.
The Airstream converter system enables you to use the
12-volt lights and equipment whether operating on selfcontained battery power or hooked up to 120-volt city
power. The 12-volt light bulbs give off the same light
as regular household bulbs, so that when operating
on self-contained battery power, everything works
normally except the 120-volt convenience outlets and
120-volt appliances.
When operating with city power, make very certain
that the service is 120 volt, not 240 volt.
The converter system is a transformer designed to
maintain constant output voltages regardless of the
variances that occur in city power systems. The design
eliminates the need for complex electronic sensing
systems to charge the batteries, minimizing the
possibility of failures and greatly increasing its overall
In some older parks and other locations where threepronged outlets are not available, certain precautions
to ensure proper grounding and polarity must be taken.
These precautions are listed below:
1. Attach the three-pronged plug to a two-pronged
adapter. The third conductor line of this adapter
has a short wire lead that must be grounded.
2. For proper grounding, connect the short ground
lead to a grounded outlet box or to a cold water
pipe. When no water pipe is available, drive a
metal rod two feet into the ground and attach the
ground lug to it, thus providing the unit with proper
When the three-pronged plug can be used,
there will be no problems with proper polarity or
grounding with a properly-wired shoreline outlet.
Airstream calibrates all settings at the factory and
recommends adjustments not be made.
2018 Interstate
120-Volt Electrical System
Ground Fault Circuit Interrupter
City Power
Most states require touring coach’s with exterior
120-volt receptacles and receptacles close to a water
sources, such as a faucet, to have a GFCI. When
properly installed, the GFCI circuit breaker provides
reliable overload and short-circuit protection, plus
protection from ground faults that might result from
contact with a HOT load wire and ground.
When your touring coach is hooked up to external AC
power, the converter system automatically charges
the touring coach batteries regardless of the battery
disconnect switch position. The speed and degree of
charge depends on how much power is used for lights
and appliances, as only the surplus goes to charging
the battery. If you are making an extended stay you
should keep your touring coach hooked up to external
AC power, if it is available.
While you are connected to external AC power, the
wiring is protected by circuit breakers in the breaker
panel. The circuit breaker panel for the 120-volt system
is located in the converter. In the event of a failure of
a 120-volt circuit, first check your touring coach circuit
breakers and the breaker for the outlet into which your
touring coach shoreline cord is plugged. If a breaker
continues to trip after you have reset it several times,
your circuit may be overloaded with appliances or there
may be a short in the circuit. Try lessening the load on
the circuit. Perhaps an electric griddle, hair dryer, or an
electric heater can be turned off. If that does not solve
the problem, consult an Airstream Service Center.
The 120-volt electrical system provides power to
operate the A/C, converter, and 120-volt receptacles
for portable appliances. The power is carded through
the 120-volt city power flexible cord to the 120-volt
distribution panel, and then is distributed to each
appliance or receptacle. Exterior 120 volt outlets are
located on the curbside exterior wall.
All wire, components, and wiring methods conform to
federal and state requirements.
The system incorporates GFCI breakers that
implement an auto self-test functionality. When turned
off, these breakers require external AC or generator
power to be present, or the AC inverter enabled, before
they can be turned back on. If power is present from
one of these sources, and the breaker refuses to stay
on consult an electrician or certified RV technician.
Each GFCI circuit breaker is calibrated to trip with a
ground current of 5 mA or more. Since most people
can feel as little as 2 mA, a distinct shock may be felt
if the need for protection exists. However, the shock
should be of such short duration that the effects would
be reduced to less than the normally dangerous
level. However, persons with acute heart problems or
other conditions that can make a person particularly
susceptible to electric shock may still be seriously
While the GFCI circuit breaker affords a high degree of
protection, there is no substitute for the knowledge that
electricity can be dangerous when carelessly handled
or used without reasonable caution.
GFCIs are proven lifesavers; however, consumers
need to take a few minutes each month to perform this
simple test. By taking action, you can help protect your
family from the risk of electric shock.
The GFCI circuit breaker will NOT reduce shock
hazard if contact is made between a HOT load wire
and a neutral wire or two HOT load wires.
The GFCI circuit breaker provides protection only
to the circuit to which it is connected. It does NOT
provide protection to any other circuit.
2018 Interstate
Entertainment Systems
GFCI Receptacle Test
TV Antenna
To properly test GFCI receptacles:
• Push the Reset button located on the GFCI
receptacle first to assure normal GFCI operation.
• Plug a device, such as a night light, with an ON/OFF
switch into the GFCI receptacle and turn the product
to the ON position.
• Push the Test button located on the GFCI receptacle.
The device should turn off and a red light should
illuminate, indicating the GCFI is tripped.
• Push the Reset button again. The device should
come on again.
If the device remains on when the Test button is
pushed, the GFCI is not working properly or has
been incorrectly installed (wired improperly). If your
GFCI is not working properly, call a qualified, certified
electrician who can assess the situation, rewire the
GFCI if necessary, or replace the unit.
If the test/reset buttons are not located on the GFCI
receptacles they will be located inside the power
GFCI Breaker Test
Perform this test on the GFI circuit breaker each month
and record the date.
Push To
Winegard’s RoadStar™ omnidirectional antenna
provides excellent reception of VHF/UHF TV
channels. The TV antennas compact modern styling
is unobtrusive and blends well with the designs of
recreational vehicles.
The UV stabilized copolymer housing makes the
antenna virtually impervious to weathering and color
change. The unique omnidirectional characteristics
provide excellent reception in areas where stations are
in different directions without the need for a complex
rotor system. A built-in amplifier provides up to six
times the received signal on VHF and nine times the
UHF signal ensuring the best possible reception.
Cleaning Antenna Housing
The surface of the antenna is a tough laminated
ultraviolet shield. Clean only with mild soap and water.
Use no solvents, alcohol, or cleaning fluids.
TV, Blu-Ray Player, and Navigation System
The Interstate Touring Coach is equipped with a
Samsung Blu-Ray player and Samsung LED HDTV’s.
Please refer to the documentation included in your
owner’s packet for instructions on their use.
The Interstate is also equipped with a Fusion
infotainment system, bringing automotive stereo and
navigation up to speed with modern technologies.
Refer to the Fusion Owner’s Manual provided for
information on its use.
1. With handle B in “ON” position, press PUSH TO
TEST button A.
2. Handle B should move to TRIP position, indicating
that GFCI breaker has opened the circuit.
3. To restore power move handle B to “OFF” and then
to “ON“.
Driving while distracted can result in loss of
vehicle control, damage and injury. Airstream
recommends you use extreme caution when using
any device that may take your focus away from
the road. Your primary responsibility is the safe
operation of the vehicle.
2018 Interstate
Privacy Disclaimer
Satellite Antenna Pre-Wiring
When a cellular device is connected to the radio/
navigation system, a profile may be created that is
linked to that cellular device. Among other things, the
profile may contain data about your phone book, text
messages, and call history. In addition, the system
may create and retain an index of media content from
any media device connected. This cellular profile and
media index data will remain a part of the audio unit
unless they are deleted. Airstream recommends that
the profile and media index both be erased if you plan
to no longer use the system or the vehicle.
Roof Mounted Satellite
Airstream does not have the capability to access any
data contained within the profile at any time. Please
refer to the radio/navigation systems owner’s manual
for their terms and conditions, as well as, detailed
directions on how to setup or remove a profile.
The touring coach is pre-wired with a coax cable for a
roof mounted satellite antenna. One end of the cable
is coiled above the rear center roof locker above the
removable interior top panel and the other end is coiled
behind the removable entertainment cabinet side panel
where the TV booster is mounted. A receiver can be
placed inside the cabinet. An HDMI cable is located in
the center roof locker and runs to the rear or wardrobe
Portable Satellite Antenna
TV Wall Plate Power Supply
The wall plate/power supply provides 12 VDC to the
antenna as well as antenna signals to two TV sets.
Cable input from outdoor receptacle connects to the
wall plate and may be switched so either antenna or
cable/satellite signals may be watched.
The touring coach is also pre-wired for a portable
satellite antenna. The exterior inlet is located on
the side of the touring coach and is labeled for your
convenience. The interior pre-wire, consisting of a twopin power/ground connector and a coax cable pigtail,
is located in the front roof locker under the Blu-Ray
To receive cable signals from the outdoor receptacle:
Press switch to OFF position. The light on the wall
plate will go (OFF) showing that power is no longer
connected to the antenna and that both TV sets are
receiving signals from the outdoor receptacle. To
receive signals from antenna: Press switch to ON
position. The light on the wall plate will come (ON)
showing that power is connected to the antenna and
both TV sets are receiving signals from the antenna.
Review the manuals included in your owner’s packet
before operating the system.
2018 Interstate
All appliances are delivered to Airstream, Inc., with indepth owner’s manuals. Those manuals are included in
the delivery case supplied by your dealer. The manuals
may contain Warnings, Cautions, and operating
instruction that should be read and followed before
operating the appliances.
The information contained in the appliances manuals
supersedes any information contained in the Airstream
Interstate Owner’s Manual on appliances. If you
believe contradictory information on appliances is
contained in this manual, or If any appliance manual(s)
have not been provided with your vehicle, contact
your dealer, the respective appliance manufacturer, or
Airstream Customer Service at 937-596-6111 or write:
Airstream Factory Service Center
428 W. Pike Street
P.O. Box 629
Jackson Center, OH 45334-0629
(937) 596-6111
Follow the instructions and Warnings noted in the
respective appliance and equipment owner’s manuals,
as well as those mentioned below.
Annual maintenance should be conducted on propane
gas appliances and equipment by an authorized dealer
or repair facility.
Insects can build nests in the burners of various
appliances and equipment. The burner and burner
orifice of the propane gas appliances and equipment
should be cleaned by an authorized dealer or repair
facility any time circumstances or conditions warrant,
but no less than on an annual basis.
For additional Liquid Propane Gas (LPG) safety
and warning information, refer to Section 2 - Safety
and Section 6 - Exterior of this manual.
Air Conditioner
The roof A/C used on Airstream Touring Coach’s
are one of the most popular on the market today. In
your owner’s packet is a set of literature covering all
operating and maintenance instructions. If the literature
is misplaced, contact the A/C manufacturer or your
Airstream dealer for replacement.
Proper voltage to the A/C is critical. A volt meter
check may find voltage much lower at a campground
shoreline outlet than the needed 110 to 120 volts.
Your A/C may not function if the current drops below
105 volts. Low voltage is usually associated with
older or poorly maintained motorhome parks. Many
motorhome’s, built only 20 or 30 years ago, may
not have air conditioners capable of operating on
some receptacles. Parking your touring coach so the
power cord can be plugged in to a receptacle close
to the fuse or circuit breaker box can alleviate low
voltage problems. Avoid extension cords and adapters
whenever possible. If an extension cord must be used,
it should be rated at 30 amps and as short as possible
to provide the most current.
If high temperatures are expected, make an effort
to park in a shaded area. Starting the A/C early in
the morning also helps. It is more efficient to hold
a comfortable temperature than it is to lower the
temperature after the interior of the touring coach is
already hot.
Review the air conditioning literature supplied in
your owner’s packet before proceeding.
Airstream recommends shutting off the gas supply
at the LPG tanks before refueling the tow vehicle or
entering a refueling station.
Most LPG appliances used in recreational vehicles
are vented to the outside of the vehicle. When
parked close to a gasoline pump, it is possible that
gasoline fumes could enter this type of appliance
and ignite from the burner flame, CAUSING A FIRE
2018 Interstate
Exhaust Fans
Thermostat and Rain Sensor
The fan is equipped with a built-in thermostat. Set
the fan to auto and select your comfort setting on the
multiplex control panel and the fan will automatically
turn on and off as your touring coach heats up and
cools down. When the rain sensor becomes wet the
dome will close automatically and shut the fan off.
Once the sensor has dried out the dome will reopen
and the fan will restart.
In the bathroom, round ventilators are used and are
opened by pushing straight up on the crossbar handle
and pressing the red switch to engage the fan motor.
High Volume Roof Vent
The vent can be put into auto mode only when
HVAC is set to off. In auto the vents will only shut
off and close when the temperature is 2° below the
set point. Setting the climate control to anything
other than off will bring the vent fan out of auto
Fan motor will not start if temperature selected is
warmer than interior temperature of the coach.
The high-volume roof vent system is designed to
quickly exhaust stale, hot air and draw in fresh air. It
is great to use when the outside temperature does not
call for air conditioning, but heat has built up in your
touring coach. The core of the system is a powerful
rotary fan that works with a slightly open window to
create a balanced airflow. It is designed for maximum
air exchange, minimum sound levels and power
consumption. Fresh, clean, natural air is pulled in. Hot,
stale, stuffy air is pushed out.
The controls for the roof vent have been incorporated
into the Multiplex System. The vent lid can be opened
or closed by pressing the UP/DOWN arrow buttons
on any of the multiplex touch screen control panels
located in the front or rear of the touring coach. Select
the desired fan speed of either; low, medium, or high.
Never place Lindeen™ or a like cover over ceiling
fan. Greatly restricted airflow and increased sound
levels will occur.
2018 Interstate
Cleaning Instructions
1. Turn fan motor off.
2. Remove screws around perimeter of screen insert
3. Clean screen with soap and water solution, dab dry
with a soft cloth, and reinstall.
This product has been manufactured using prime
UV stabilized Polymers for maximum toughness
and durability. However, the use of non-compatible
chemicals will cause cracking and product failure.
Please refer to the user’s manual provided in your
owner’s packet for more information.
If your vent fails to operate properly under normal
conditions, please contact the manufacturer. Please
have the touring coach retail sales date and the vent
Serial Number readily available when you call. Refer to
your operating guide for contact information.
The manufacturer of the furnace in your touring coach
has been well known in the motorhome industry for
many years. The furnace burns LP gas, and is powered
by 12-volt current from the batteries or power converter
when plugged in to city power. Operating instructions
are located in your owner’s packet. If they should
become misplaced, new literature can be ordered
directly from the manufacturer or your Airstream dealer.
The manufacturer also offers a detailed service guide
for your furnace.
Review all refrigerator literature supplied in your
owner’s packet or stored in the refrigerator prior to
operating it.
The furnace is controlled by the main Multiplex control
panel located in the front roadside roof locker. The
reset button, depending on model, is located on the
furnace behind the access panel or behind the panel
next to the furnace. Remove the panel to gain access.
Carefully read all the manufacturer’s instructions
prior to operating. NEVER store flammable material
next to the furnace or in close proximity to the
furnace exhaust outlet on the side of the touring
If warranty service is required, use only a
service location recommended by the furnace
manufacturer or your Airstream dealer.
Microwave Ovens
Refer to the Certified Performance Checkout sheet,
included in your owner’s packet, for manufacturer,
model, and serial number information.
There is little difference between the operation of
home gas ranges and the touring coach’s range. If,
however, you are used to an electric range, operating
confidence can be quickly gained by reading the
manufacturer’s directions provided in the owner’s
packet. Manufacturer’s service and parts manuals are
also available.
An operation manual for the range has been
provided with your owner’s packet. If this has not
been provided, contact the listed manufacturer to
obtain. Their manual contains specialized warnings
and cautions that should be reviewed prior to
operating the appliance.
The refrigerator requires 12-volt current to operate,
even if running on 120-volt mode. The 12-volt current
is used to power the circuit board that directs the
refrigerator functions.
All units are supplied with a wide range thermostat
designed to sense the evaporator (cold plate)
temperature. The coldest position on the thermostat is
reached by turning the knob to the right (clockwise);
conversely turning the thermostat knob to the left
(counterclockwise) yields a warmer setting. The OFF
position is reached by turning hard counterclockwise
past the click. The reference point is shown with an
indicator sticker beside the knob.
Start up
Turn the power on and set the thermostat between 3
and 4. You can make further adjustments to suit your
personal requirements after the box has cooled down.
Allow the refrigerator to come down to temperature
before loading with product. Adding pre-cooled product
will help keep the temperature stable when loading.
Setting the thermostat to a higher setting e.g., 7, will
not decrease the time required for the unit to cool down
to its normal operating temperature. The unit will cool
at the same rate on DC as on AC.
Defrost and Cleaning
The frequency of defrost is dependant on the number
of door openings, the ambient temperature and the
humidity level. Typically, it is a good practice to defrost
once there is ¼ inch of frost buildup on either side of
the evaporator (cold plate). When defrosting, the unit
is shut off at either the breaker panel or by turning the
thermostat counterclockwise to the OFF (0) position.
Prop the door open. We suggest placing a towel in the
bottom of the refrigerator to catch excess moisture.
Now that the unit has been defrosted, the interior can
be cleaned with a non-abrasive cleaner. Do not use
“Brillo” or “SOS” type abrasive pads, as they will score
the surfaces. Baking soda is recommended.
Speeding up the defrost process with a knife
or scraper is strongly discouraged due to the
likelihood of rupturing the refrigerant circuit.
2018 Interstate
SeeLevel II Monitor Panel
The display is the only system component that is
accessed by the user. The display shown above is
located in the overhead cabinet behind the drivers
seat. All user input to the display is done using the four
buttons along the bottom of the display.
The following information is for use of the SeeLevel
II Monitor Panel. The Multiplex Systems main
control panel can also be used.
The display receives the information from the three
sender pads via a single, two-conductor wire, and
displays the level information in percent of full on a
three-digit, LED display. When the front panel button
for a particular tank is pressed, the display powers
up and displays the level for that tank. If the button
is pressed and released, the display will show the
level for about 5 seconds and then shuts down
automatically. If another button is pressed before the
display shuts down, then the new level will immediately
be shown. If the same button is pressed twice, the
display will hold on that tank and continue to show
updated levels for 5 minutes before shutting off. This
allows the user to monitor the filling or draining of the
tank. By pressing two buttons at once, the diagnostic
functions can be accessed.
Sender pads are installed and stuck to the sides of
the holding tank. Sender pads can be cut to match
the height of the tank, it also auto calibrates itself
so it can read from empty to full. The sender pad
scans the water level through the tank wall using
digital techniques programmed into the sender
To Read a Water or Sewer Tank Level
1. Press the button corresponding to the tank to be
checked and release it, the display will show the
levels in percent on the LED display. If no other
button is pressed, then the display shuts off after
about 5 seconds.
2018 Interstate
2. If another button is pressed before 5 seconds, the
display will immediately switch to show the new
level or voltage. The 5 second time-out is restarted
every time a button is pressed.
3. To continuously display a reading, press and
release the desired button, and then press the
same button a second time. When the button is
released, the display will be on hold mode, which
is indicated by the decimal point on the right hand
side turning on. While the display is in the hold
mode it will recheck the level once per second
so the user can watch the level change while the
tank is being filled or drained. The display will
automatically shut off after 5 minutes in hold mode.
To end the hold mode before the 5 minutes is up,
press any tank button, and the display will shut off.
To Read the Battery Voltage
1. Press the BATT button and release it, the display
will show the battery (House) voltage on the LED
2. If no other button is pressed, then the display will
shut down after about 5 seconds. If the BATT
button is held down, the display will continuously
recheck the voltage and show the updated value.
The reading may flicker back and forth between
two values.
3. If another button is pressed before the 5 second
time is up for the BATT button, the display will
immediately switch to show the value for the new
button. The 5 second time-out is restarted every
time a button is pressed.
4. There is no hold mode for the battery voltage
To Program the LED Brightness
1. The display needs to enter the brightness
programming mode. To do this, press and hold
the BATT button; the display will show the battery
2. While continuing to hold the BATT button, press
and hold the GREY button. Continue to hold
both buttons for approximately 5 seconds until
the display shows “bri” to indicate the brightness
programming mode. When this occurs, release
both buttons.
3. Press the GREY tank button to increase
brightness, or the FRESH tank button to decrease
4. When the display shows the correct brightness,
press the BATT button to exit the programming
Solar System
Below is a representation of normal operating valve
settings. When the valve is in the upright position the
water valve is open. When winterizing or storing for
long periods it is recommended to close the bypass
valve by turning the valve a quarter turn. Refer to
Section 9 - Maintenance for further winterization and
storage instructions.
Airstream utilizes Go Power Flex-100 solar panels and
a Sun Explorer Charger Controller/Display System.
The display is mounted in the front roadside roof locker
behind the drivers seat. Manuals on their use are
included with the Airstream owner’s packet.
Refer to Section 9 - Maintenance for Solar Panel PreWire diagram and information.
Water Heater
The Interstate Touring Coach is equipped with an
on-demand tankless water heater featuring 60K BTU
output, freeze protection, and direct spark ignition. The
tankless water heater monitors inlet water temperature
and flow, and output water temperature and flow. The
water heater is operated using the Multiplex System’s
control panel.
Review the water heater literature supplied in your
owner’s packet before proceeding.
This appliance does not have a pilot. It is equipped
with an ignition device which automatically lights
the burner. Do not try to light the burner by hand.
The water heater has built-in FREEZE
PROTECTION and will intermittently cycle the
burner when the water temperature is between
1°C/ 35°F to 4.5°C/40°F. To provide this freeze
protection, the gas supply must be on, gas must be
available and electrical power must be on.
2018 Interstate
Section 6
EXTERIOR ���������������������������������������������������������������������6-1
ROADSIDE EXTERIOR FEATURES ����������������������6-6
WAXES AND POLISHES�����������������������������������������6-2
CURBSIDE EXTERIOR FEATURES ����������������������6-7
MOTOR COACH FINISH���������������������������������6-2
Washing Your Touring Coach�������������������������������6-3
Body Kit ���������������������������������������������������������������6-3
Windows ��������������������������������������������������������������6-3
Alcoa Dura Bright Rims ���������������������������������������6-4
Cleaning Instructions���������������������������������6-4
Exterior Shower ���������������������������������������������������6-4
Exterior Sliding Step���������������������������������������������6-4
Lock Extended Switch�������������������������������6-4
Shoreline Power Supply ��������������������������������������6-5
TV/HDMI Inlets And Receptacle Outlets��������������6-5
City Water Hookup�����������������������������������������������6-5
Hydraulic Leveling System ����������������������������������6-5
2018 Interstate
SCREEN DOORS �������������������������������������������������6-10
Folding Screen Door (Lounge)���������������������������6-10
Sliding Screen Door (GT)�����������������������������������6-10
Powered Rear Screen ���������������������������������������6-10
AWNING���������������������������������������������������������������� 6-11
Awning Use In Wind And Rain��������������������������� 6-11
Awning Manual Override ����������������������������������� 6-11
Care And Maintenance��������������������������������������� 6-11
HITCH COVER�������������������������������������������������������6-12
How To Remove The Hitch Cover ���������������������6-12
Before Removal���������������������������������������6-12
After Removal �����������������������������������������6-12
The exterior of your Airstream Interstate Touring
Coach, except for the body kit, has been painted
by Sprinter. The care of the paint is detailed in the
Sprinter manual. The following additional information is
provided by Airstream to help you understand the finish
and its care. Following these instructions will provide
a long lasting, high-gloss finish for your recreational
vehicle. These same procedures can also be applied to
your everyday automobile, producing the same longlasting results.
Information on finish care may provide additional
information and tips on the use of the Sprinter
Van as a touring coach, however, no information
about the exterior finish of your touring coach
in this manual should be interpreted as advice
or directions to disregard or void the warnings,
cautions, or other information contained in the
Sprinter’s manuals.
Waxes and Polishes
Over 90 percent of all automotive finishes are clear
coat. The finish on your touring coach is a state-of-theart Acrylic Urethane Basecoat/ClearCoat. This means
you will wash and polish a clear urethane coating
designed to protect the basecoat: the pigmented
coating that provides color. As its main function is
protecting the basecoat, the clearcoat needs to
be maintained especially in harsh environments.
Clearcoats do not fade themselves, but appear to fade
or lose gloss as the surface becomes contaminated by
the environment. If this contamination is not removed
frequently, the result will be a dull or low-gloss finish.
Occasional washing alone will not adequately remove
some forms of contamination and polishing will be
Polishes and waxes primarily serve the following
1. To remove minor surface imperfections caused by
water spots and acid rain
Do not use products that contain harsh abrasives
such as rubbing or polishing compounds. These
products should be used by experienced technicians
with the proper training and equipment. Most polishes
and waxes are designed to clean and polish in one
A hand-applied polish or wax will offer outstanding
performance and protect the touring coach finish.
When applying polish or wax, do so in a shaded
area making sure the surface is at the specified
temperature according to the polish manufacturer’s
recommendations. Due to the variations of polishes
and waxes, incorporate the following suggestions into
the polishing technique:
1. Condition the polishing pad by rubbing a slight
amount of polish on it.
2. Use only the amount of polish specified in the label
3. Work a small area at a time.
4. Rinse off and remove dried polish from crevices,
trim, and moldings.
5. Follow the products manufacturer’s directions.
How to Care for Your Touring Coach
Keeping your touring coach looking its best at all times
involves keeping the paint finish clean and in good
condition. This means periodic washing and polishing,
as well as getting the paint finish repaired as soon as
possible when the paint is damaged or affected in any
way. The purpose of the paint finish is twofold:
• Provide an aesthetically pleasing appearance.
• Protect the vehicle from the environment.
Your touring coach is exposed to many environmental
conditions that have an adverse effect on the paint
1. Road salts and sodium chloride
2. To remove minor scratches by filling them and
leveling the surface
2. Road tar/bugs
3. To beautify the paint finish appearances with more
depth and high-gloss
4. Industrial fallout/acid rain/pollution
4. To protect the paint finish from the elements
3. Bird droppings/tree sap
5. Ultraviolet exposure and moisture
The most common problems resulting from these
conditions are corrosion, staining, and chemical
spotting. These problems can be minimized through
regularly-scheduled washing and polishing.
2018 Interstate
Washing Your Touring Coach
Body Kit
Make sure the touring coach’s surface temperature
is not too hot, under 90°F, and not in direct sunlight.
A shady area is ideal for washing your vehicle, as
direct sunlight causes water and soap to evaporate
too fast, resulting in water spotting. Use a mild soap or
Most auto care stores carry a car wash shampoo. Try
to avoid combination wash-n-wax products as these
waxes cause buildup and are designed for smaller
surfaces. Have two dedicated sponges or wax mitts:
one for the paint finish and one for the wheels and
under carriage. Brushes or wash mitts that have plastic
bristles are acceptable for use on tires and wheel wells,
but are not intended for use on the paint finish. Avoid
using such items on painted surfaces, as they will
damage the touring coach paint and finish.
Wash the wheels and wheel wells first as this prevents
splattering on already clean panels. Wash from the top
and work your way down, frequently rinsing to minimize
grit abrasion. Follow with a final rinse of water. This
process will remove most contamination from the
touring coach’s surface. For stubborn stains such as
road tar, use an ammonia-based glass cleaner or a
small amount of rubbing alcohol on a damp cloth. This
may not dissolve the road tar, but will loosen tar and
bugs stains and remove them from the surface. Do not
use solvent-based cleaners on bird droppings or tree
sap as these are water-based stains and will eventually
dissolve using an ammonia-based glass cleaner, warm
soapy water and a little “elbow grease.” Once again,
after removing stubborn stains immediately rinse with
clean water.
Drying the touring coach is just as important as
washing your vehicle as today’s tap water and well
water contain many chemicals that could water stain
your touring coach’s finish. We suggest using a damp
natural or synthetic chamois, however, there are other
drying products such as lint free micro-fiber towels that
work just as well.
Follow the simple cautionary measures, and your new
finish will give you maximum gloss and durability.
It is recommended that the caulking and sealant used
in external seams and joints such as window frames,
light bezels, beltline, and rub-rail molding, etc., be
checked regularly. If this material has dried out and
becomes cracked or checked, or if a portion has fallen
out, it should be replaced with fresh material to prevent
possible rain leaks. Caulking and sealing material is
available from your touring coach dealer and most RV
supply stores.
2018 Interstate
The body kit provided by Airstream is made from stateof-the-art high impact plastic. The same material is
used in the automotive industry for moldings, bumper
guards, and trim. The kit is made to color specifications
and requires no paint or finish. The cleaning
procedures are the same as the painted finish on the
Sprinter body; however, there are several automotive
plastic care products on the market for exterior parts
that will provide added protection from UV ray damage,
dirt, and stains. Find one you like and use it as often as
needed to help prevent fading.
Clean your touring coach windows the same way you
clean the windows in your home. Clean the seals with
a damp cloth and mild detergent every 3 to 6 months.
Do not use strong solvents, as they will damage the
seals. A coat of natural silicone lubricant applied after
the seal has dried will keep it flexible. Spread the
lubricant evenly with a brush or finger, working it into
the surface. This is a good practice for all rubber seals
in your touring coach.
Failure to properly clean and lubricate the window
seals could result in the window sticking to the
jamb and should only be released by a qualified
technician trained in the procedure. Do not force,
pry, or apply great pressure to open the window.
Failure to heed this warning may cause the window
to shatter and/or cause personal injury.
For replacement of a damaged window, contact an
Airstream Service Center.
Alcoa Dura Bright Rims
Exterior Sliding Step
Cleaning Instructions
These rims require no chemicals to clean them. Simply
use a mild soap, water, clean towel, and rinse. Follow
these steps for an easy clean and shine.
1. Rinse the wheel prior to washing with a brush. This
will prevent scratching.
2. Mix a mild detergent and water. Any car wash or
household detergent will work.
3. Using a soft clean brush and soap solution, clean
the rims. (Do not use any abrasive-type brushes or
4. After cleaning the surface, rinse thoroughly to
remove all soap so it will not spot. Towel drying will
help this as well.
When using a power washer, maintain a proper
distance from the touring coach. The proper
distance is approximately 2.2 ft. when using a
round jet nozzle, and 1 ft. when using a 25 degree
flat spray jet nozzle. Never point the jet nozzle at
moldings, hoses, electrical components, seals,
plug connections, etc. Never use round jet nozzles
on tires, the pulsating water can damage the substructure of tires.
Exterior Shower
The curbside sliding door has a sliding step with auto
retract, step out warning buzzer, and a lock extended
switch located on the multiplex panel just inside the
sliding door. Please read, understand, and instruct
passengers of the following operational and safety
information pertaining to the step.
The step extends and retracts as the sliding door is
opened and closed with the engine off and step lock
extend switch off. The step retracts automatically and
will not extend when the engine is started to prevent
damage while in transit.
If the step does not retract fully, a warning buzzer will
sound. The vehicle should not be driven if the step fails
to retract completely. This buzzer is controlled by a 10amp fuse.
An undercarriage light, extending from wheel to wheel,
has been added for your convenience. This step light
can be turned on/off or dimmed using the multiplex
panel, located just inside the sliding door, labeled
“under coach”.
Lock Extended Switch
To use the lock extended switch, turn the engine off,
open the door to extend the step, and turn the switch
on. The step will now remain extended while opening
and closing the door. Turn the switch off to return the
step to normal operating mode.
All units are equipped with an exterior shower. This
shower consists of a shower hose, shower head, and
water valve inside a lockable exterior door. Water is
supplied by the pump or city water hookup. The shower
head/hose assembly is stored inside the rear doors. To
use: insert the hose into the wall inlet, pull back slightly
to verify it is securely connected. Press the spout
button and rotate the faucet handles to the desired
temperature. To remove hose assembly, hold back
the water inlet fitting while simultaneously pulling out
on the hose fitting. Be sure to press the spout button
to relieve any residual pressure before removing the
If you forget to turn the lock extended switch off before
starting the engine, the step will retract when the
engine is started; however, it will not extend when the
engine is turned off and the door is opened. To reset
the step, turn the engine off and the step lock extended
switch off with the door closed.
LOOK BEFORE YOU LEAP. The step will not extend
with the opening of the sliding door when the
engine is running. Check that the step is extended
before leaving and entering vehicle. Failure to
follow this warning could result in person injury.
2018 Interstate
Shoreline Power Supply
Hydraulic Leveling System
The Power Cord hookup is located on the side of the
touring coach. The cord may be stored in the rear
exterior compartment. The power cord is plugged
into the touring coach receptacle and the City Power
The Interstate Touring Coach can be equipped with
the optional electrically/hydraulically driven leveling
system. The hydraulic pump is powered by a 12 volt
direct current motor, which pumps hydraulic oil through
the hydraulic hoses to four jacks. The leveling system
can be operated by the remote control or the control
panel on the passenger’s seat pedestal under the
skirting. The four jacks are mounted directly to the
Touring Coach’s chassis and are pre-set to the required
leveling capacity.
Use only power cords recommended by Airstream.
Before starting the leveling procedure you must follow
these guidelines:
Many campgrounds provide less than 30-amp service
and your hookup may blow their fuse or circuit breaker.
If this happens, reduce the load and replace the fuse or
reset the breaker.
1. Park on a surface that is as level as possible.
TV/HDMI Inlets and Receptacle Outlets
4. The vehicles ignition must be ON.
An inlet for TV/HDMI and an outlet for a 120 volt
receptacle is located on the curbside of the touring
coach and is labeled for your convenience.
City Water Hookup
2. The parking brake must be engaged.
3. The transmission must be in either Neutral or Park.
To start the automatic leveling process press the
“ON/OFF” button, located on the remote or control
panel, to switch the system ON. Press the “Automatic
Mode” button to begin the leveling procedure. Once
the leveling process is complete press the “ON/OFF”
button again to turn the leveling system OFF. The
jacks can be retracted by turning ON the system and
pressing the “Retract All Jacks” button once. Make sure
to turn OFF the leveling system once the jacks are in
their stowed position.
For more information on the hydraulic leveling system,
or how to manually level the Touring Coach, please
refer to the user manual provided.
The city water hookup is located on the side of the
touring coach. For consistent water flow and plumbing
line safety, an in-line regulator limits pressure to 50 psi.
Use a tasteless, odorless, non-toxic, high-pressure
hose of at least 1/2-in. diameter designed for touring
coach use. The city water inlet is a standard garden
hose thread. We suggest you carry two lengths of hose
in order to reach hookups farther away than normal, as
well as to have a spare.
After hooking up the hose and turning on the city water
valve provided in the park, slowly open a faucet. There
will be a lot of spurts and sputtering until all the air is
expelled from the touring coach system. It may take
some time before all the air is expelled and a steady
flow of water occurs. Once a steady flow is achieved at
one faucet, the others should be opened long enough
to expel the air in the lines going to them.
2018 Interstate
Depending on the terrain the automatic leveling
process takes about one minute during which all
persons should refrain from entering the vehicle.
This product is exclusively developed as a leveling
system and may not be used for other work
under the vehicle such as changing the tires or
All jacks will retract when the parking brake is
released or the ignition is turned on.
Roadside Exterior Features (Lounge)
Roadside Exterior Features
This is a basic explanation of the location and
function of exterior features. More in-depth
explanations of certain feature’s care and
maintenance is include in this manual in other
1. City water hookup provides access for city water
to your fresh water system. Use ½ inch minimum
hose for water supply.
2. Water fill is used to fill the fresh water tank. Use
only clean fresh potable water.
3. Furnace exhaust vent should be cleaned regularly.
When operating furnace, be sure exhaust can
escape into a well ventilated area. Air coming from
vent can be hot. When parking the touring coach,
be sure to have proper clearance in venting area.
4. Exterior shower outlet can be used on the water
pump or with the city water hookup after faucet/
valve/hose assembly is inserted.
5. Utility hatch contains the switches for the dump
valves, macerator pump and macerator pump highpressure hose reel.
6. Water heater exhaust vent should be cleaned
regularly. Make sure exhaust can escape into a
well ventilated area. Air coming from vent can be
hot. When parking the touring coach, be sure to
have proper clearance in venting area.
7. Cable/Satellite TV inlet is located inside the utility
hatch and is pre-wired for cable/satellite TV. A
portable satellite dish can be connected and used
in the cable connection.
8. 30-amp power cord inlet. Power cord is stored
inside rear cargo doors in a plastic storage
9. Macerator hose reel compartment stores the
electric reel holding the pump hose and the Black
Tank Flush.
10. Body kit.
2018 Interstate
Curbside Exterior Features (Lounge)
Curbside Exterior Features
This is a basic explanation of the location and
function of exterior features. More in-depth
explanations of certain feature’s care and
maintenance is include in this manual in other
1. Exterior 120-volt outlet provides an exterior GFCI
protected electrical source.
2. TV outlet and HDMI port provides reception for an
exterior television. It is pre-wired and integrated
into the Cable TV/Satellite TV system. There is
also an HDMI outlet.
4. Sliding step with auto retract has a step out
warning buzzer and a lock extended switch for
easy entry into the touring coach.
5. Porch light is switched just inside the sliding cargo
door on the forward shower wall.
6. High volume roof vent is an exhaust-only vent.
Complete operating instructions are in the
appliance section of this manual. Keep all vents
clear to encourage airflow.
7. Roof air conditioner
8. Power boosted omni-directional TV antenna is
wired into TV outlets on exterior of coach and
inside unit at entertainment center cabinet.
3. LP tank remote fill and shutoff location.
2018 Interstate
Roadside Exterior Features (Grand Tour)
Roadside Exterior Features
This is a basic explanation of the location and
function of exterior features. More in-depth
explanations of certain feature’s care and
maintenance is include in this manual in other
1. City water hookup provides access for city water
to your fresh water system. Use ½ inch minimum
hose for water supply.
2. Water fill is used to fill the fresh water tank. Use
only clean fresh potable water.
3. Furnace exhaust vent should be cleaned regularly.
When operating furnace, be sure exhaust can
escape into a well ventilated area. Air coming from
vent can be hot. When parking the touring coach,
be sure to have proper clearance in venting area.
4. Exterior shower outlet can be used on the water
pump or with the city water hookup after faucet/
valve/hose assembly is inserted.
5. Utility hatch contains the switches for the dump
valves, macerator pump and macerator pump highpressure hose reel.
6. Water heater exhaust vent should be cleaned
regularly. Make sure exhaust can escape into a
well ventilated area. Air coming from vent can be
hot. When parking the touring coach, be sure to
have proper clearance in venting area.
7. Cable/Satellite TV inlet is located inside the utility
hatch and is pre-wired for cable/satellite TV. A
portable satellite dish can be connected and used
in the cable connection.
8. 30-amp power cord inlet. Power cord is stored
inside rear cargo doors in a plastic storage
9. Macerator hose reel compartment stores the
electric reel holding the pump hose and the Black
Tank Flush.
10. Body kit.
2018 Interstate
Curbside Exterior Features (Grand Tour)
Curbside Exterior Features
This is a basic explanation of the location and
function of exterior features. More in-depth
explanations of certain feature’s care and
maintenance is include in this manual in other
1. Exterior 120-volt outlet provides an exterior GFCI
protected electrical source.
2. TV outlet and HDMI port provides reception for an
exterior television. It is pre-wired and integrated
into the Cable TV/Satellite TV system. There is
also an HDMI outlet.
4. Sliding step with auto retract has a step out
warning buzzer and a lock extended switch for
easy entry into the touring coach.
5. Porch light is switched just inside the sliding cargo
door on the forward shower wall.
6. High volume roof vent is an exhaust-only vent.
Complete operating instructions are in the
appliance section of this manual. Keep all vents
clear to encourage airflow.
7. Roof air conditioner
8. Power boosted omni-directional TV antenna is
wired into TV outlets on exterior of coach and
inside unit at entertainment center cabinet.
3. LP tank remote fill and shutoff location.
2018 Interstate
Screen Doors
Folding Screen Door (Lounge)
Check that the screen door is open before closing the exterior door. Failure to follow this caution could
result in damage to the screen door.
Sliding Screen Door (GT)
Check that the screen door is open before closing the exterior door. Failure to follow this caution could
result in damage to the screen door.
Powered Rear Screen
To lower the rear power screen, press the down button on the multiplex control panel once. To stop the power
screen in the position that you want, press the button again or allow the screen to stop automatically when it
reaches its set limit. To raise the power screen back up press the up button on the multiplex control panel.
2018 Interstate
The awning manufacturer provides a complete Owner/
Operator Manual for the awning located in your
owner’s packet. The multiplex panel just inside the
sliding door or the main touch screen panel controls
the awnings extend/retract feature as well as the
awning lights.
Awning must be retracted before driving the
Touring Coach. Damage may occur if the awning is
not properly retracted. The awning will not extend
while vehicles engine is running.
Rear doors must be closed when operating the
awning or if the vehicle is left unattended, due to
seismic sensor, with the awning extended. Damage
may occur if the awning is extended or retracted
with the rear doors open.
Awning Use In Wind and Rain
The automatic extra strong awning comes with a
Direct Response™­System seismic sensor. The Direct
Response™­System is an innovative seismic sensor
system that automatically activates the 12V motor
and retracts the awning in strong winds, thus avoiding
possible damage to the awning.
If wind or extended periods of rain are expected,
retract the awning and secure as for travel.
The effects of wind and rain on any awning are
unpredictable. Severe damage to the vehicle and
or the awning may result and cannot be covered by
Never use the awning with damaged fabric. Make
sure the awning can be correctly retracted.
Awning Manual Override
If power to the vehicle is not available, the awning can
be safely retracted using the manual override located
on the idler (right) end of the case. A ratchet and socket
extension has been included and is located under the
passenger side compartment floor.
1. Remove thumb screw from backside of decorative
awning cap. The cap will be held in place by velcro
that must be released before removing.
2. Remove cover from the right end of awning and
3. Insert the 3/8” socket drive extension and handle
into the square drive hole inside the end cap.
4. Turn the handle clockwise until the awning is
5. Replace the end cap.
After closing the awning with the manual override,
the lead rail may move out from the case 1/4”-1/2”.
This is normal and the awning is secure for travel
until power is restored or repairs are completed.
Do NOT attempt to force the lead rail in with the
override, serious damage can occur to the awning.
Manual override cannot be used to extend the
Care and Maintenance
1. PERIODIC MAINTENANCE Like any other part
of the touring coach, an owner should periodically
inspect the awning. The following items should be
a. All mounting brackets are tight.
b. Check all pivot points for enlargements of
holes or broken rivets.
c. Check end caps for cracking and splitting.
d. Check that awning rail is tight against coach
and all screws are tight.
e. Check canopy for loose stitching and possible
shrinkage or puckering.
f. Clean and lubricate all tension knobs and pivot
Fuse Location: Chassis fuse panel under driver’s seat,
2018 Interstate
Hitch Cover
How To Remove The Hitch Cover
Before Removal
After Removal
1. Kneel down behind the rear bumper. There are
two slide latches on the rear cover located on the
lower backside of the cover. Both will need to be
slid to the inside to be unlatched properly as shown
2. Push outer latch past the pin on both sides to
release as shown below.
3. Pull straight down to remove cover. Once removed
you can store this in one of the rear storage
compartments. Reverse these instructions to
2018 Interstate
Section 7
SPRINTER VAN ������������������������������������������������������������� 7-1
Tire Grip��������������������������������������������������������������� 7-5
Hydroplaning�������������������������������������������������������� 7-5
FUEL ����������������������������������������������������������������������� 7-2
CHANGING A TIRE������������������������������������������������� 7-5
COMPONENT IDENTIFICATION����������������������������� 7-2
Flat Tire����������������������������������������������������������������� 7-6
Sprinter Van Serviced By Mercedes-Benz
Sprinter Or Its Suppliers���������������������������� 7-2
Precautions When Changing A Wheel����������������� 7-6
Chassis ����������������������������������������������������� 7-2
Drivers And Passengers Seats
And Restraint Systems������������������ 7-2
Airstream Components Serviced By
Airstream Or Its Suppliers������������������������� 7-2
Cab Area ��������������������������������������������������� 7-2
Living Quarters������������������������������������������ 7-3
Electrical Components ������������������������������ 7-3
Exterior������������������������������������������������������ 7-3
Battery Assist ������������������������������������������������������� 7-3
TIRES���������������������������������������������������������������������� 7-3
Vehicle Placard And Tire Inflation
Pressure Label������������������������������������������ 7-3
Procedure ������������������������������������������������� 7-6
Spare Tire Carrier������������������������������������������������� 7-6
Jack ��������������������������������������������������������������������� 7-7
Mounting A New Wheel���������������������������������������� 7-8
Centering Wheels With Wheel Nuts��������������������� 7-8
Lowering The Vehicle ������������������������������������������ 7-8
Wheel Bolt Tightening������������������������������������������ 7-8
TIRE ROTATION ����������������������������������������������������� 7-9
Rotation Pattern For Dual Rear Wheels �������������� 7-9
Support����������������������������������������������������������������� 7-9
Correct ������������������������������������������������������ 7-9
Proper Tire Inflation ��������������������������������������������� 7-4
Incorrect����������������������������������������������������� 7-9
Under Inflation ����������������������������������������������������� 7-4
AIR RIDE SUSPENSION��������������������������������������� 7-10
How Overloading Affects Your Tires��������������������� 7-4
Manual Adjustments������������������������������������������� 7-10
Tires And Wheels������������������������������������������������� 7-4
2018 Interstate
Sprinter Van
The Airstream Interstate Touring Coach is integrated
into a Sprinter Van designed and manufactured by
Mercedes-Benz. Operation of the Sprinter, its engine,
power train, and other related components are
discussed in the Mercedes-Benz Sprinter Owner’s
Manual and other literature provided by Sprinter. As
a point of reference, those systems discussed in this
literature are warranted by Mercedes-Benz or their
Sprinter Van Serviced by Mercedes-Benz
Sprinter or Its Suppliers
Important Sprinter Information
Power mirrors
Your Mercedes-Benz Sprinter Van Operator’s and
Warranty Manuals contain important Cautions,
Warnings, operational, and warranty information on
the Sprinter and its components. All information in the
Sprinter manual should be reviewed and followed for
your safety. The Airstream Interstate Owner’s Manual
may provide addition information and tips on the
use of the Sprinter Van as a touring coach; however,
no information in the Airstream manual should be
interpreted as advice or directions to disregard or
void the warnings, cautions, or other information
contained in the Sprinter manuals. If you believe
there is a conflict in information, Warnings, Cautions,
or safety-related information between the Sprinter
and Airstream manuals, please contact the Airstream
customer relations department immediately to resolve
the conflict.
The Mercedes-Benz Sprinter Owner’s Manual contains
important fuel requirement information on using UltraLow Sulfur Diesel, Bio fuels, and very low temperature
operation. Please read, understand, and follow this
Component Identification
If repairs are needed, it may be difficult to determine
which parts are Mercedes-Benz and which are
Airstream’s responsibility. The following partial lists
show the major components of the van and the
company responsible for their servicing.
For assistance in locating a service center in the United
Speed control
Exterior automotive lights
Automotive electrical
Engine battery
Engine cooling system
Fog lamps
Chassis suspension
Instrument panel cluster
Hitch receiver and tow plug
Doors, cab, side and rear
Heated drivers/passenger
Drive axle and hubs
Cab door windows and
Steering assembly,
Steering wheel
AM/FM radio antenna
Dash AC/heater/defroster
Rear window defroster
and heated windshield
Cargo door assist handle
Automotive fuse panel
Wheels, Tires
Parking brake
Fuel pump
Lane keeper assist
Blind spot assist
High beam assist
Collision prevention assist
Drivers and Passengers Seats and Restraint
Sprinter provides the swivel pedestals and Airstream
provides the seat decorative skirting and recovers the
front seats to match the surrounding decor.
Airstream Components Serviced by Airstream
Authorized Service Centers or Airstream
Cab Area
Driver’s and passenger’s seat skirting and covers.
Customer Assistance Center
Floor Mats
Three Mercedes Drive
Dash Kit
Montvale, New Jersey 07645-0350
Rear View Mirror/Monitor
Vanity Mirrors
See Mercedes-Benz Sprinter Warranty Information
Manual for complete instructions.
2018 Interstate
Sprinter Van
Battery Assist
Living Quarters
Second row cab seats,
Smoke/CO/LP detector
Fire extinguisher
Three piece sun and
privacy shield
Interior furniture
Window Coverings
Appliances in the lounge/
lavatory area.
Floor covering
All plumbing systems
Electrical Components Monitor panel and its
Multiplex System
Roof AC
TV antenna
House batteries
GPS/Sirius antenna
Battery disconnect
Power vents
Blu-Ray player
120-volt system
Fusion Radio
12-volt living area system
Alcoa Dura Bright Rims
Exterior lights
Exterior body kit
Power step
Please contact Airstream or Onan for a service
location if repairs are need for the generator.
If you need further clarification or information, contact
the Airstream Customer Relations Department at
(937)596-6111 before contacting a service center for an
If you wish to write, the address is:
Airstream Inc.
Attn: Customer Service
428 W. Pike Street
P.O. Box 629
Jackson Center, Ohio 45334
2018 Interstate
A Battery assist button is located on the dash just
below the headlamp switch. If, for any reason, the
chassis battery runs low, push and hold this button for
at least 60 seconds. While still holding, turn the ignition
key to start the engine and continue to hold the button.
Release the button after 20 seconds and the engine
should continue to run. If the engine fails to continue
running repeat the process holding the start assist
button for at least 30 seconds after turning the ignition
Under inflation or over inflation of tires is dangerous.
Under inflation can result in tire flexing, heat build-up,
tire overloading, bad handling, bad fuel economy, and
uneven wear. Over inflation can result in abnormal
wear, bad handling, harsh ride.
Tire inflation pressures should be checked as per
the Mercedes-Benz Sprinter’s Owner’s manual
and when significantly changing the load you plan
to carry in your touring coach. Set the correct tire
pressure before loading the vehicle. Always check tire
inflation pressures when the tires are “cold.” Inflation
recommendation is 61 psi. Front and rear pressures
are shown for each model and GVWR, and are based
on the GVWR and front and rear axle ratings (GAWRs)
printed on your vehicle VIN plate and certification label.
Tires must be inflated to these pressures when the
vehicle is fully loaded or an axle GAWR is reached.
Proper front end alignment improves tire tread mileage.
Your front-end suspension parts should be inspected
periodically and aligned when needed. Improper
alignment may or may not cause the vehicle to vibrate.
However, improper toe alignment will cause front tires
to roll at an angle, which will result in faster tire wear.
Incorrect caster or camber alignment will cause your
front tires to wear unevenly and can cause the vehicle
to “pull” to the left or right.
Vehicle Placard and Tire Inflation Pressure
supplies information on the size and the cold tire
inflation pressure for the original equipment tires
supplied with your vehicle. Check the Sprinter manual
for all weights and tire information placard location.
included with your Airstream owner’s packet. Please
take the time to read, understand, and follow the
information contained in the booklet.
Sprinter Van
Proper Tire Inflation
The level of air in your tires affects your vehicle’s
overall performance. Not even the highest quality tire
will perform well if it’s not inflated properly. The correct
pressure varies from vehicle to vehicle and depends
in part upon driver preference. Each vehicle has a
recommended inflation pressure, usually found on a
placard. Check the Sprinter manual for all weights and
tire information and the placard location.
Correct tire inflation is a key component in tire care.
The recommended inflation pressures for your tires are
indicated on the certification label or in your owner’s
manual. Since touring coach’s can be loaded with
many different configurations, the load on each tire will
vary. For this reason, air pressure should be checked
based on the load on each individual tire. Cold Inflation
Pressure should be adjusted to handle the maximum
tire load, and all tires on the axle should carry the same
inflation pressure. Cold tire inflation pressure is the tire
pressure checked in the morning before you drive more
than a few miles or before rising ambient temperatures
or the sun’s radiant heat affect it. Check your tire air
pressure at least once a month, before each trip, and
each morning you drive during a trip. Tire pressure
should be checked cold, as tire pressure ratings have
been designed with typical running heat/pressure build
up in mind. Make sure the valves and caps are free of
dirt and moisture.
Under Inflation
Under inflation brings a higher risk of susceptibility
to damage due to road hazards, reduces tire casing
durability, and causes a loss in fuel economy, plus
uneven or irregular tire wear. Severe under inflation
brings about an increased risk of tread separation,
handling difficulties, and possibly tire failure, which is
caused by overheating.
It is a common practice for motorhome owners to
lower tire pressure in their search for a smoother
ride. This is not only dangerous, it is relatively
ineffective, and the difference in ride quality is
not significant. When minimum inflation pressure
requirements are not met, tire durability and
optimum operating conditions are compromised.
Tire inflation pressure should always meet at least
the minimum guidelines for vehicle weight.
• It may be necessary to inflate your tires at a truck
stop or truck service center in order to achieve
adequate air pressure for your coach’s needs
• Only permanent air seal metal valve caps should be
• Be safe - if a tire has been run 20 percent under
inflated, it must be dismounted and inspected by a
trained professional. It should not be inflated without
a full inspection or without using a safety cage. Use
a calibrated gauge. If your tire is rated for higher
inflation pressures, a special gauge designed for
larger tires will be required.
• Don’t bleed air from warm tires to reduce pressure
• Don’t inflate tires to cold psi rating beyond rim
How Overloading Affects Your Tires
Tire pressure is what enables your touring coach tire to
support loads. Overloading your tires can have serious
consequences for passengers and your touring coach.
Too much weight can cause stress on your touring
coach’s suspension system, brake failure, shock
absorber damage, handling and steering problems,
irregular tire wear and possible tire failure. Excessive
loads or under inflation can lead to an excessive
amount of heat and tire failure. If you discover that your
tires cannot handle the load, lighten the weight of the
load on your tires.
Tires and Wheels
(This section is partially excerpted from the MercedesBenz Sprinter Van Operator’s Manual.)
Check tires regularly for even tread wear, tread depth
(note legal requirements), and signs of external
damage. Use only wheels and tires of the same size,
make, and pattern.
Do not install tires that are not approved for the size
and type of wheel installed on the vehicle itself. Only
use those wheel sizes that were delivered to you by
your authorized Mercedes-Benz Sprinter dealer.
Use only wheels and tires that have been tested and
approved by the vehicle manufacturer.
Break in the tires at moderate speeds for a distance of
about 65 miles.
2018 Interstate
Sprinter Van
Always replace wheel nuts that are damaged
or rusted. Never apply oil or grease to wheel
nuts. Damaged wheel hub threads should be
repaired immediately. Incorrect mounting bolts
or improperly tightened mounting bolts can
cause the wheel to come off. This could cause an
accident. Make sure to use the correct mounting
bolts. Check tightness of wheel nuts regularly and
retighten if necessary.
Tire Grip
Changing A Tire
(Partially excerpted from the Mercedes-Benz Sprinter
Van Operator’s Manual)
After changing a wheel, the wheel nuts must be
tightened once the vehicle has been driven for about
30 miles.
If new or repainted wheels are fitted, the wheel nuts
must be retighten again after about 600 to 3000 miles.
Do not use remolded tires.
Tire grip is greatly reduced on a wet or icy road. Speed
and driving style must therefore be adapted to suit road
conditions. In winter, install M + S radial tires. Below
a tread depth of 1/8 in., tire grip begins to decrease
rapidly on wet roads.
Fitting wheel sizes other than those supplied by
Sprinter to the vehicle will change the Sprinter’s
handling characteristics and may lead to an
accident resulting in severe personal injuries,
death and property damage.
California Tire Chain notice: Your motorhome may
not be operated with tire chains.
Read the Sprinter manual for wheel torque and
wheel tightening procedures.
Depending on the depth of the water layer on the road,
hydroplaning may occur, even at low speeds and with
new tires. Reduce vehicle speed, avoid grooves in the
road, and apply brakes cautiously in the rain.
The majority of flood-related deaths are caused by
people attempting to drive through moving water.
Driving into flood waters may be the most dangerous
thing one might ever try. Considering the following:
• Most cars will float (and be swept away) in 18-24
inches of moving water. Trucks and SUVs have only
6-12 more inches of clearance. Creeks and rivers
can rise very rapidly and the road bottom can also
wash away, making the water much deeper than it
• Once cars are swept downstream, they will often roll
to one side or perhaps flip over entirely. The driver
has a few seconds to escape the vehicle. Many
drivers panic as soon as the vehicle submerges and
are found later with their seat belt intact.
2018 Interstate
The Mercedes-Benz Sprinter Operator’s
Manual contains important cautions, warnings,
specifications, and operational information on
changing, maintaining, and replacing of the tires
and wheels. Read, understand, and follow the
Sprinter manual sections for changing a tire.
Changing a tire on a touring coach chassis is
a physically demanding procedure. It requires
specialized tools and knowledge of safety
procedures. Only you can determine your
knowledge base and physical ability. Don’t take any
unnecessary risks. Find a safe area to park your
unit, and call a tire service center and supply them
with the information in the Sprinter Manual if you
have any doubts about changing a tire.
Sprinter Van
Flat Tire
If you get a flat tire while driving, gradually decrease
your speed. Hold the steering wheel firmly and slowly
move to a safe place on the side of the road. The
pressure of the spare wheel always has to be checked
regularly (at least after every tenth time at the filling
• Park the vehicle on a firm, level, non-slippery
The vehicle tool kit and the jack are located in a hatch
under the front passenger foot well.
The jack is designed exclusively for jacking up the
vehicle at the jack take-up brackets built into either
side of the vehicle. To help avoid personal injury,
use the jack only to lift the vehicle during a wheel
change. Never get beneath the vehicle while it is
supported by the jack.
Precautions When Changing a Wheel
• Keep hands and feet away from the area under the
lifted vehicle.
• Always firmly set parking brake and block wheels
before raising vehicle with jack.
• Switch on the hazard warning flasher switch, apply
the parking brake, and place the transmission
selector in “P”.
• Everyone must leave the vehicle before you jack it up.
• Everyone must leave the danger zone before
you jack up the vehicle. Danger zones vary with
locations. Take a minute and look at what might
happen if the vehicle falls off the jack and rolls. Set
up your danger zone.
• The vehicle must be safeguarded in accordance with
legal regulations (such as using a warning triangle).
• Prevent vehicle from rolling away by blocking wheels
with wheel chocks (not supplied with vehicle) or
sizable woodblocks or stone. On a level road place
one chock in front of and one behind the wheel that
is diagonally opposite to the wheel being changed.
When changing a wheel on mild uphill or downhill
grade, place chocks on the downhill side blocking
both wheels of the other axle. Do not jack vehicle up
on a steep grade.
• Do not disengage parking brake while vehicle is
• Always use the jack on a level surface.
• Do not jack the vehicle up more than 1-2 in. between
the tire and the surface. Otherwise, the vehicle may
tip over and may cause serious injury or death to you
or others.
• Be sure that the jack arm is fully seated in the jack
take-up bracket.
• Always lower the vehicle onto sufficient capacity jack
stands before working under the vehicle.
• Do not damage, grease, or oil wheel nuts or stud
Do not change wheels on a steep uphill or downhill
grade. The vehicle may begin to move and fall from
the jack, which could cause property damage,
personal injury, and/or death.
Spare Tire Carrier
Wheel lug pins
Yoke w/pins
Wheel lug pins
Winch Tire Yoke
Airstream remounts the spare tire and installs the
spare tire winch assembly on all units that do not
have the optional air ride suspension. The spare tire is
located under the rear of the touring coach against the
bottom of the chassis floor structure .
2018 Interstate
Sprinter Van
A winch mounted under the rear floor is used to lower
and raise the spare tire. The winch has a nut sticking
up through the floor under the center rear lounge on
the rear lounge model accessed by opening the rear
cargo doors. The nut is located inside the curbside bed
on the twin bed model and is accessed by opening
the bed storage door. To remove the spare tire, use
the ratchet and a 19-mm deep well socket located in
the tire replacement bag under the passenger-side
compartment floor to turn the winch nut counter clock
wise. Place blocks under the tire before it reaches the
ground to block the tire up and remove the weight from
the yoke. Slide the yoke through the rim, and slide the
tire from under the touring coach.
To store a spare tire reverse the removal instructions.
The winch tire yoke has two pins that align with the
wheel rim lug holes. The yoke pins must be placed
in the lug holes to prevent the wheel assembly from
sliding against the cable during transit and possibly
cutting it. Be sure the wheel is turned on the correct
side so pins will fully engage the lug holes. The side
of the rim that goes against the hub goes against the
For units with the optional VB Air Ride Suspension
equipped Airstream uses the standard Sprinter
installed spare tire carrier.
To remove the spare tire begin by opening the rear
doors. Use a screwdriver to pry off two plastic bolt
covers. Using the lug wrench, supplied with the vehicle
tool kit, unscrew the now visible bolts. Slightly raise
the spare wheel bracket and unhook the left and right
hand retaining hooks. You should now be able to slowly
lower the bracket down to the ground.
To store a spare tire reverse the removal instructions.
Using the jack to lift the bracket with the spare tire into
place and latch the right then left hand retaining hooks.
Please refer to the Mercedes-Benz Sprinter Operator’s
Manual for complete instructions on removing or
installing a spare tire.
Spare tire carrier winch is designed for hand
operation only. Do not use impact type power tools
to drive this device.
Defective spare tire equipment or an improperly
stored spare tire could damage your equipment
and/or cause serious, possible fatal injuries to
people inside your touring coach, other motorists
and pedestrians. The yoke pins must be inserted
into the spare tire lug holes while the wheel is in
the store position during travel. The cable and
support system must be free from defects and in
good working order. The complete system should
be checked before each trip and every 1000 miles
during a trip for any signs of wear or possible
failure. Please contact your dealer or Airstream
Customer Service if you have any questions on the
use of this equipment.
Read, understand, and follow the Mercedes-Benz
Sprinter Operator’s manual instructions, cautions, and
warnings for changing a wheel and jack point locations.
The jack is intended only for raising the vehicle
briefly, for instance when changing a wheel. The
jack must be placed on a firm, flat surface only.
Do not change wheels on either uphill or downhill
grades. Do not crawl under the vehicle while it is
raised with the jack. Do not start the engine while
the vehicle is jacked up. Do not jack the vehicle up
more than 1-2 in. between the tire and the surface.
The vehicle may tip over and cause serious injury
or death to you or others. Jack stands must always
be used while working beneath the vehicle. Failure
to follow these precautions could result in property
damage, personal injury, and/or death.
The jack is located together with vehicle tool kit under
the hatch in the front passenger foot well.
• Loosen the wheel nuts before raising the vehicle.
• Close the release valve on the jack.
• Assemble the pump lever provided and insert it into
the socket on the jack.
• Secure lever by turning it clockwise in the socket.
• Position the jack under the appropriate jack point and
raise the vehicle by pumping the lever.
2018 Interstate
Sprinter Van
Installing and Removing A Wheel
• Loosen the wheel nuts.
If the vehicle moves forward or backward while it is
being jacked up, lower it, stabilize the vehicle, and
repositioned the jack. When the vehicle is jacked
up, the jack must stand vertically (plumb-line).
Only certain tires meeting the tire size/load/speed
index ratings contained in the Tire Pressure Tables,
found in the Index Section of the Mercedes-Benz
Sprinter’s Operators or Owner’s Manual, are
certified to conform to FMVSS 120 for the Sprinter
Vehicle at this time. Please check the sidewalls of
your originally-equipped tires for specific makes/
sizes, and speed load ratings when you need to
replace your tires. To prevent accident, injury, or
possible death, use only the correct tires for your
tire replacement.
Mounting a New Wheel
Wheel Bolt Tightening
• Before fitting the spare wheel, clean rust and dirt off
the contact surfaces of the wheel and the wheel hub
and from the wheel nuts.
Tighten all wheel nuts evenly in the crosswise
sequence indicated.
• Jack up the vehicle until the wheel is clear of the
• Unscrew the wheel nuts and remove the wheel (keep
the wheel nuts clean).
• Note the specified wheel and tire size, tire load
capacity, and speed code.
• Do not change the tire’s direction of rotation.
• Do not damage, grease, or oil wheel nuts or their
Centering Wheels With Wheel Nuts
• If dual assemblies are used, before placement, the
inner wheel should be inspected to ensure all ball
bearing rings are in the proper position.
• Install the wheel and snug the wheel nuts.
• Slightly tighten wheel nuts.
Lowering the Vehicle
• Slowly open the jack release valve to lower the
vehicle until tire is resting on ground.
• Tighten the wheel nuts in a crosswise pattern, as
specified, with a torque wrench. For tire pressure and
wheel bolt torque procedures, see the MercedesBenz Sprinter Van Operator’s Manual.
Consult the Mercedes-Benz Sprinter Operators
manual for extensive wheel tightening and wheel
torque procedures, cautions, and warnings.
For safety reasons, the wheel tightening torque
must be checked immediately after changing a tire
and again after 30 miles to 140 ft-lbs. The wheels
could otherwise come loose.
• Remove the jack and stow it in the vehicle tool kit.
• Check the tire pressure. For tire pressures see the
Mercedes-Benz Sprinter Operator’s Manual.
• Retighten the wheel nuts to the specified torque with
a torque wrench after a distance of approximately 30
2018 Interstate
Sprinter Van
Tire Rotation
Front and rear tires perform different jobs and can wear
differently depending on the types of roads driven,
driving habits, etc. To obtain the longest tire life, you
should inspect and rotate your tires regularly.
Many automotive dealers and tire dealers will perform
a free tire inspection to look for uneven or abnormal tire
Dual Tire Foot Print
Tires should be rotated every 6,000 to 8,000 miles.
For the longest tire life, any time irregular wear is seen
have the tires checked, alignment checked, and tires
rotated by your truck or tire dealer. Have the cause of
uneven wear corrected.
Figure 1
Rotation Pattern For Dual Rear Wheels
The CORRECT methods are shown in Figure 1. Dual
tires are supporting the full load. Please note that the
blocks are wider than the tread and longer than the
tire’s footprint. This provides maximum support to the
tires and ensures that the load is evenly distributed
throughout the tire’s footprint area.
Read the Mercedes-Benz Sprinter Operator’s
Manual for complete instruction on tire rotation,
installation, and maintenance.
Vehicles with aluminum alloy wheels will require
tires to be dismounted and remounted so as to
leave rims in original locations because the dura
bright finish is only applied to one side.
Since touring coach’s may sit for long periods it is
important to properly support the tires if blocks are
used for leveling.
Extreme caution must be taken to ensure that the
tires are fully supported when using blocks to level the
touring coach. The load on the tire should be evenly
distributed on the block and in the case of duals,
evenly distributed on blocks for both tires. If not done,
the steel cables in the sidewall of the tires may be
damaged and could lead to premature fatigue of the
2018 Interstate
Figure 2
INCORRECT methods are shown in Figure 2: One
tire, a portion of one tire, or portions of two tires are
supporting the full load.
Tires that are incorrectly supported may be
damaged, which could lead to casing failure
resulting in serious injury or property damage.
If, on previous occasions, the tires have been
incorrectly supported, hidden damage may be
present. Please contact your local tire dealer and
request an inspection and a determination of
possible damage.
Sprinter Van
Air Ride Suspension
Manual Adjustments
The Mercedes-Benz Sprinter Van is available with a
rear axle air suspension. The Sprinter is extremely
suited for this air suspension system and is only
available as an option at the time of manufacturing.
A remote, located on the B-pillar next to the drivers
seat, can be used to manually adjust the air
suspension. To manually adjust, while parked set the
emergency brake. With the engine running, press the
up or down arrows to raise or lower the rear of the van.
Two memory buttons, labeled M1 and M2, allow for two
different memorized height settings. To set, adjust the
van to the desired height then press and hold one of
the memory buttons.
The full-air rear-axle air-suspension, has an
electronic system which automatically monitors and
adjusts the height level of the vehicle. This constant
monitoring and adjusting (independent of the load,
in the longitudinal and lateral direction and relatively
independent of centre gravity height) will automatically
contribute to safer vehicle behavior and better comfort.
2018 Interstate
Section 8
DRIVING������������������������������������������������������������������������� 8-1
Loading A Trailer �������������������������������������������������� 8-5
LOADING����������������������������������������������������������������� 8-2
Checking Weights Of Vehicle And Trailer������������� 8-5
Weighing�������������������������������������������������������������� 8-2
Attaching A Trailer������������������������������������������������� 8-6
Vehicle And Trailer Wights And
Ratings Definitions ������������������������� 8-2
TOWING A TRAILER ���������������������������������������������� 8-6
Procedure For Weighting A Touring Coach���������� 8-3
Weight Distribution����������������������������������������������� 8-3
SAFETY ������������������������������������������������������������������ 8-4
Seat Belts������������������������������������������������������������� 8-4
Child Safety Seat ������������������������������������������������� 8-4
LATCH ������������������������������������������������������ 8-4
How To Install a LATCH
Equipped Seat������������������������������� 8-4
Tracking ��������������������������������������������������������������� 8-7
Brake Controller��������������������������������������������������� 8-7
Backing Up ���������������������������������������������������������� 8-8
Rearview And Side Monitor System��������������������� 8-9
Passing����������������������������������������������������������������� 8-9
Parking Your Touring Coach��������������������������������� 8-9
TOWING YOUR TOURING COACH����������������������� 8-9
SAFETY CHECK LIST������������������������������������������� 8-10
Exterior Check List (Before Entering) ���������������� 8-10
Trailer Hitches������������������������������������������������������ 8-5
Interior Check List (Before Driving)�������������������� 8-10
2018 Interstate
One of the most critical aspects of safely operating
a touring coach is knowing the weight involved and
where it is placed. The first thing to determine is how
much cargo is being loaded and confirming that it
is within the capacity of the equipment being used.
Determining WHERE that load is placed is critical to
the way your rig will handle on the road.
Do not try to guess what your touring coach weighs
loaded. Load your touring coach including water,
propane, etc and take it to a public scale. Weigh each
axle of your vehicle. Refer to your axle weight and
tire limits to see if you are within a safe range. Total
all axle weights and make sure you are below the
GVWR. If you are not overloaded, make sure your
load is balanced. Do not load too much on one side. A
balanced load is much easier to tow or drive.
Front to back balance is also important. Step back and
look at your touring coach. Make sure there is not too
much weight in the front or on the rear of the touring
coach. Be sure to secure all items. Loose items can
cause damage and can be a safety issue.
The Cargo Carrying capacity tag shown below is
installed on every touring coach and can be found on
the inside of the door on your vehicle.
VIN #################
XXX kg or XXX lbs
Safety belt seating capacity: XXX
A full load of water equals XXX kg or XXX lbs of cargo @ 1 kg/L (8.3 lb/gal) and the tongue
weight of a towed trailer counts as cargo
EXCEED” number, Airstream weighs the vehicle as
finished and adds the weight of full tanks of LP and
chassis fuel. That number is subtracted from the
GVWR of the touring coach and listed on the tag, The
total weight of any and all cargo, including but not
limited to dealer or customer modifications or additions,
fluids (freshwater and holding tanks), food, clothes,
tools, tongue weight of a towed trailer or vehicle, and
passengers should never exceed the number listed
while the touring coach is in transit.
When loading the vehicle it is important to keep
the GVWR, GAWR, Tire Weight Ratings (listed on
the vehicle tire Information placard), and the cargo
and occupant capacity in mind and not to exceed
these specifications. Your safety depends on not
overloading the touring coach, axles, and tires. See the
specification section for the weight rating list of these
To determine the actual weight of your vehicle with
personal cargo and water, it must be weighed on
scales as you plan to travel. The most common scales
are those used by states to weigh trucks along the
highway. In rural areas, grain elevators, cement outlets
and gravel pits are a good source.
Weighing instructions for this touring coach are
explained on the next page. If you have trouble
locating scales, a call to your State Highway Patrol
will usually find them cooperative in assisting you.
Vehicle and Trailer Weights and Ratings Definitions
Gross Vehicle Weight Rating (GVWR) is the maximum
permissible weight of the touring coach.
Gross Vehicle Weight (GVW) comprises weight of
vehicle including tools, spare tire, installed accessories,
passengers, cargo, and trailer tongue weight. It must
never exceed the GVWR.
Gross Axle Weight Rating (GAWR) is the maximum
permissible axle weight.
Gross Trailer Weight (GTW) is the maximum
permissible trailer weight to be towed.
Trailer Tongue Weight Rating (TWR) is the maximum
permissible weight of the trailer tongue. This counts as
cargo when loading a touring coach.
Check the Sprinter manual for all weights and the
tire information placard location.
number of passengers that seat belts are provided for.
arrived at by multiplying the fresh water tank and water
heater capacities by 1Kg/L or 8.3 lb/gal.
2018 Interstate
Front Axle GAWR
Rear Axle GAWR
Optional Tow Weight
Front Axle GAW
Rear Axle GAW
Tow Weight minus
Weight of Trailer
or Vehicle Towed
GAWR = Gross Axle Weight Rating
GVWR = Gross Vehicle Weight Rating
GCWR = Gross Combination Weight Rating
Left Front Wheel
Left Side
Left Rear Wheel
(Total LF + LR)
Right Front Wheel
Step 1 minus Step 4
Right Front
(Total RF + RR)
Step 2 minus Step 5
Right Rear
Wheel Position
Step 3 minus Step 6
Procedure for Weighing a Touring Coach
Weight Distribution
Vehicle should be weighed loaded, as you normally
Touring coach’s have Fresh Water and Gray Water
Tanks, a water heater, and storage areas. It gives
you great flexibility in loading. With flexibility comes
responsibility. If you want to load down all the storage
compartments, the amount of fluids may have to be
reduced. It’s a trade off so plan wisely. Distribute
your additional cargo as evenly as possible with the
heaviest objects located as low as possible.
1. Fill in first row from Specification Section of this
2. Weigh vehicle as shown in row 2 (Scale Weight)
and fill in blanks.
3. Weigh one side of vehicle as shown in Individual
Wheel Position Weight.
4. Calculate other side as shown in last row.
Check the Sprinter manual for all weights and tire
information placard location.
2018 Interstate
Do you really want to carry a full fresh water tank to
a RV park 1,000 miles away and then hook up to a
city water supply? Even if you’re going to a remote
area, you can usually fill your water tank shortly before
entering the area. Just reducing your load by 10
gallons of water lets you carry an additional 83.5 lb of
Seat belts
Federally approved seat belts are provided for the
use of the driver, the right front passenger, the second
row captains chairs, and the rear lounge. Most
states require, by law, that all passengers in a motor
vehicle use seat belts while in transit. It is strongly
recommended that all occupants remain seated with
their safety belts firmly attached while the touring coach
is in transit. The driver should adjust his or her seat so
that he or she is able to reach all controls easily with
the belt on, and be able to use all the travel on the foot
brake. Seat belts should be placed as low as possible
around the hips to prevent sliding out from under them
in case of an accident. This places the load of the body
on the strong hipbone structure instead of around the
soft abdominal area. Remember, there should only be
one occupant per seat belt when traveling.
The driver and front passenger seat belt buckle
operation is explained in the Mercedes-Benz Sprinter
The rear lounge and rear captain chairs seat belt
buckles are secured by inserting the male end into the
female buckle until the buckles are secured. To release
the buckle press the release button on the female end.
Release Button
Child restraint devices are designed to be secured
with lap or lap/shoulder belts. All instructions supplied
by the restraint manufacturer must be followed.
Statistics have shown children are safer when properly
restrained in a rear seating position than in a front
seating position.
Don’t hesitate when it comes to passenger safety.
Make sure all passengers are properly restrained.
Child Safety Seat
LATCH (Lower Anchors and Tethers for Children)
LATCH is a system that makes child safety seat
installation easier (without using seat belts). The
LATCH system is a standard feature on the rear sofa
and second row captains chairs in the Lounge models.
The LATCH equipped touring coach has two sets of
small bars, called anchors, located in the crease of
the seat where the back and bottom cushions meet.
LATCH compatible child safety seats have a lower set
of attachments that fasten to these vehicle anchors.
How to Install a LATCH Equipped Seat
1. ALWAYS read and follow the vehicle owner’s
manual and child safety seat manufacturer’s
instructions for correct installation and proper use.
2. Fasten the child safety seat’s lower attachments
to the vehicle’s lower anchors. Tighten and adjust
according to the instructions and check for a
secure fit. The child safety seat should not move
more than an inch forward or sideways.
Become familiar with and follow all directions,
advice, and warnings pertaining to seats, seat belt
operation, and restraint systems, provided in the
Mercedes-Benz Sprinter Operator’s Manual. Do not
allow passengers to ride anywhere in the touring
coach except in seats that are equipped with
approved seat belts.
Children must be secured in a federally-approved
child restraint device. Failure to use proper
restraints while in transit can result in severe or
fatal injuries. Never place an infant seat that faces
to the rear on the front passenger seat. Never place
an unbelted infant seat on any seat while in transit.
If you are unsure if your child safety seat is
compatible, look for the following LATCH logo.
2018 Interstate
Trailer Towing and Driving Tips
(Some text is partially excerpted from Mercedes-Benz
Sprinter Operators Manual.)
Failure to use proper equipment and driving
technique can result in a loss of vehicle control
when towing a trailer. Improper towing or failure
to follow the instructions contained in this section
can result in serious injury. Follow the guidelines
below carefully to assure safe trailer operation.
Ask your authorized Mercedes-Benz Sprinter or
Airstream dealer if you require an explanation of
information contained in the manuals.
Trailer Hitches
Units have hitches and wiring installed from the
Mercedes-Benz manufacturer. The Sprinter 7- way
connector is used for lights and charge line on a trailer.
For further information, please see your authorized
Mercedes-Benz Sprinter dealer.
To reduce the possibility of damage, remove the hitch
ball adapter from the receiver when not in use.
Since this vehicle is designed and intended primarily
as a load-carrying vehicle, towing a trailer will affect
handling, durability and economy. Maximum safety
and satisfaction depends upon proper use of correct
equipment and avoiding overloads and other abusive
The total weight of the touring coach and
trailer must not exceed the GCWR listed in the
specification section of this manual. The maximum
towing capacity varies according to the size of the
touring coach and its GCWR. Vehicles should be
properly equipped for towing trailers. Information
on trailer hauling capabilities and special
equipment required may be obtained from your
Mercedes-Benz Sprinter and/or Airstream dealer.
Loading a Trailer
When loading a trailer, you should ensure neither the
permissible GTW (Gross Tongue Weight), nor the
trailer GVWR are exceeded.
Maximum permissible values are listed on the safety
compliance certification labels for the vehicle and
for the trailer to be towed. For their location, see the
Mercedes-Benz Sprinter Operator’s Manual. The
lowest value listed must be selected when determining
how the vehicle and trailer are loaded.
To assist in attaining good handling of the vehicle/trailer
combination, it is important that the tongue weight
be maintained at approximately 10-15 percent of the
loaded trailer weight, but not to exceed the hitch rating.
Tongue loads can be adjusted by proper distribution of
the load in the trailer, and can be checked by weighing
separately the loaded trailer and then the tongue.
The tongue weight at the hitch ball must be added to
the GVW to prevent exceeding your Sprinter towed
vehicle’s rear GAWR.
When towing trailers, touring coach tires should be
inflated to the highest pressures shown on the Sprinter
Tire Information Placard. See Mercedes-Benz Sprinter
Operator’s Manual for its location. The Cargo Carrying
Capacity (CCC) of this vehicle is reduced by the
amount that equals the trailer tongue load on the trailer
Checking Weights of Vehicle and Trailer
To assure that the tow vehicle and trailer comply
with the maximum permissible weight limits and to
know the actual weights, have the loaded vehicletrailer combination (tow vehicle including driver,
passengers, cargo, and trailer fully loaded) weighed on
a commercial scale as explained earlier in this section.
Also, check the vehicles front and rear axle weights
and tongue weight. The values as measured must
not exceed the Sprinter weight ratings listed on
vehicle information placards and in the MercedesBenz Sprinter manual. These ratings are also listed
in section 4 - Floor Plans, Specification Chart of this
Check the Mercedes-Benz Sprinter manual for all
weights and tire information placard locations.
2018 Interstate
Attaching a Trailer
Please observe maximum permitted trailer dimensions
(weight and length).
Most states and all Canadian provinces require safety
chains between your tow vehicle and trailer. The chains
should be crisscrossed under the trailer tongue. They
must be attached to the hitch receiver and not to the
vehicles bumper or axle. Be sure to leave enough slack
in the chains to permit turning corners.
Most states and all Canadian provinces required a
separate brake system for towing trailers.
The towing vehicle’s braking system is rated for
operation at GVWR, NOT at the GCWR. A separate,
functioning brake system is required for any towed
vehicles or trailers weighing more than 1000 lb
(450 kg) when fully loaded. NEVER exceed the
GVWR, or the GAWR specified on a touring coach
certification label. Also, NEVER exceed the weight
ratings of a trailer hitch installed on a touring
coach. Failure to heed any part of this warning
could result in loss of control of the touring coach
and towed vehicle or trailer which may cause
an accident and serious injury. For specified
towed vehicle braking requirements, consult the
Mercedes-Benz Sprinter Operator’s Manual that
comes with this vehicle.
Do not connect a trailer brake system (if trailer is
so equipped) directly to the vehicle’s hydraulic
brake system if your vehicle is equipped with antilock brakes. If you do, neither the vehicle’s brakes
nor the trailer’s brakes will function properly.
Property damage, injury, or death to you or others
may be the result.
The provided vehicle electrical wiring harness for trailer
towing has a brake signal wire for hookup to a brake
controller. Most states and all Canadian provinces
require a breakaway switch on trailers with a separate
brake system. The switch activates the trailer brakes
in the possible event that the trailer might separate
from the tow vehicle. Please consider using a trailer
sway control system. For further information, see
your authorized Mercedes-Benz Sprinter or Airstream
Towing a Trailer
There are many different laws, including speed limit
restrictions, having to do with trailer towing. Make sure
that your vehicle-trailer combination will be legal not
only for where you reside, but also for where you’ll
be driving. A good source for this information can
be the State Attorney General, State Police, or local
Before you start driving with a trailer, check the trailer’s
hitch, breakaway switch, safety chains, electrical
connections, lighting, and tires. Also, adjust the mirrors
to permit an unobstructed view beyond the rear of the
If the trailer has brakes using an electric brake
controller, start your vehicle and trailer moving slowly,
and then apply the brakes manually using the brake
controller to be sure the brakes are working properly.
Read and follow the controller manufacturer’s
When towing a trailer, check occasionally to be sure
the load is secure, and lighting and trailer brakes (if
so equipped) are functioning properly. Always secure
items in the trailer to prevent load shifts while driving.
Take into consideration that when towing a trailer, the
handling characteristics are different and less stable
from those when operating the vehicle without a trailer.
It is important to avoid sudden maneuvers.
The vehicle and trailer combination is heavier, and
therefore is limited in acceleration ability and requires
longer stopping distances. It is more prone to reacting
to side wind gusts, and requires more sensitive
steering input.
In order to gain skill and an understanding of the
vehicle’s behavior, you should practice turning,
stopping and backing up in an area which is free from
If possible, do not brake abruptly, but rather engage
the brake slightly at first to permit trailer to activate its
brake. Then increase the braking force.
We want every owner to be a safe and courteous
driver. A few hours of towing practice in a large empty
parking lot will make pulling your trailer over the road
much easier. Line out two corners for left and right
turns. You may also use these corners to practice
backing and parking.
2018 Interstate
Brake Controller
During practice, observe that the tracks made by the
trailer wheels are distinctly different from those made
by the tow vehicle. Studying this will make it easier for
you to correct mistakes. Consider truck- or trailer-type
fender or door grip rear view mirrors for maximum
visibility. In most states, the law requires them.
After thoroughly inspecting your hitch, brakes, and
tires, you should be ready to tow. Check traffic, signal
that you are about to pull away, and start slowly. Look
often in your mirrors, observe the action of the trailer,
and then carefully move into the proper lane of traffic.
Remember that the trailer wheels will not follow the
path of the tow vehicle wheels; therefore, wider turns
are necessary when turning to the left or right.
On freeways or expressways, try to pick the lane
you want and stay in it. Always maintain plenty of
space between you and the car ahead, at least the
length of the tow vehicle plus trailer for every 10 mph.
Remember that in order to pass another vehicle, you
will need longer to accelerate. You must also allow for
the length of the trailer when returning to the right hand
lane. On a two-lane road cars may be lining up behind
you because you are traveling at a lower speed. It is
both courteous and sensible to signal and pull over at
the earliest safe opportunity and let them pass.
Take into consideration that when towing a trailer,
the handling characteristics are different and
less stable from those with operating the vehicle
without a trailer. It is important to avoid sudden
maneuvers. Sudden maneuvers may lead to loss of
control over the vehicle-trailer combination.
The brake controller (if so equipped) is activated
when you apply the brakes of the tow vehicle. Your
tow vehicle brakes will automatically apply the trailer
brakes first when properly adjusted. This will help keep
your tow vehicle and trailer in a straight line and make
you stop as if you were driving the tow vehicle alone. If
swaying or swerving should occur, briefly operating the
controller separate from the vehicle brakes may help
correct the situation. Practice this maneuver on a clear
highway. Do not wait for an emergency and then grope
for the controller.
When towing a trailer, you might encounter a
temporary cooling system overload during severe
conditions such as hot days when pulling on a long
uphill grade, when slowing down after higher speed
driving, or driving long idle periods in traffic jams. If
the hot indicator light comes on, or the temperature
gauge indicates overheating and you have your AC
turned on, turn it off. Pull over in a safe place and put
on your emergency brake. Don’t turn off the engine.
Increase the engine idle speed. Lift the engine hood
and check for fluid leaks at the radiator overflow outlet.
Check to see that all drive belts are intact and the fan
is turning. If you have a problem have it fixed at the
next opportunity. If there is no problem the light should
go off or temperature should come down within one
minute. Proceed on the highway a little slower. Ten
minutes later resume normal driving.
If the transmission continually shifts between
gears on inclines, manually shift to a lower gear.
A lower gear and reduction of speed reduces the
chances of engine overloading and/or overheating.
When going down a long hill, shift into a lower gear
and use the engine’s braking effect. Avoid riding
the brakes, thus overheating the vehicle and trailer
brakes. If the engine coolant rises to an extremely
high temperature (e.g. coolant temperature needle
approaching the red zone) when the AC is on, turn
off the AC. Engine coolant heat can be additionally
vented by opening the windows, switching the
climate control fan speed to high and setting the
temperature control to the maximum hot position.
Never open a radiator cap when the tow vehicle is
hot. Add coolant when the vehicle is cool.
2018 Interstate
On slippery pavement, do not use engine drag to
help slow down as this may cause the rear wheels
of the tow vehicle to skid. On icy pavement, drive
slowly and if you feel the tow vehicle skidding,
gently apply the trailer brakes only. This will bring
the tow vehicle and trailer back into a single line.
Chains do not help trailer wheels.
When going downhill in dry weather, downshift so that
engine compression will slow the whole rig down. Take
dips and depressions in the road slowly and do not
resume normal driving speeds until you are sure that
the trailer wheels are clear of the dip.
Backing Up
In BACKING UP the important thing to remember
is to DO EVERYTHING SLOWLY and to correct
immediately if you see the trailer turning the wrong
way. Concentrate on the rear of the trailer. With your
tow vehicle and trailer in a straight line, back up
slowly and turn the bottom of the steering wheel in the
direction you want the trailer to go. Watch from the
window or in the mirror until the rear of the trailer is
pointing in the desired direction. Your tow vehicle will
be following the trailer in an arc. Straighten the tow
vehicle and trailer by turning the steering wheel more
sharply, and then when they are in line, straighten the
steering wheel.
When driving in mud and sand, let the momentum carry
the rig through. Apply power gently and use as little as
possible. Stay in the tracks of the vehicle ahead and
keep the tow vehicle in the highest possible gear. If you
are stuck, it is best to tow out the entire rig together
without unhitching.
Despite even the best hitch, you will notice that
whenever a large bus or truck overtakes your rig the
displaced air first pushes the trailer rear slightly to the
right and then affects the front. It may be necessary
to steer very slightly, momentarily, toward the bus or
truck to help compensate for the sway induced by the
passing-vehicle. Do not apply the vehicle brakes, as
this can tend to exaggerate the situation. You may find,
however, that briefly applying the trailer brakes with
your manual control will help eliminate sway.
a hill or slope. Leaving your tow vehicle in gear is
not enough for standstill safety. Do not use trailer
brakes as parking brakes.
Start in position (A) start. Turning steering wheel as
shown in (1). will put you in trailer position (B). Turning
steering wheel show in position (2) puts you in trailer
position (C). Steering position (3) returns front wheels
to straight backing.
Always try to back to your left because the visibility
is much better.
When you do not make it on the first try it is usually
much easier to pull forward to your original straight
position and start over.
If your spouse or traveling companion normally directs
you when backing they should position themselves
forward of the tow vehicle so the driver can easily see
them. Their directions should always indicate to the
driver the direction the rear of the trailer should go.
A little practice in a parking lot with the person giving
directions can save a lot of frustration when backing
into a campsite.
2018 Interstate
Rearview and Side Monitor System
Parking Your Touring Coach
An LCD digital monitor comes standard on all Interstate
models and replaces the existing rear view mirror. It
comes with a built-in speaker and touch screen buttons
to control all settings.
To reduce the risk of personal injury or damage to
the vehicle power train as a result of vehicle/trailer
movement, always:
Included in the system are side cameras which are
displayed on the digital monitor. Side cameras are
activated with the turn signals. Putting on your right
turn signal will display the passenger side camera and
your left signal will display the drivers side camera.
Putting the vehicle in reverse will activate the backup camera. The rear camera is the primary, and will
override the side cameras if the vehicle is placed in
reverse. The rear camera can be turned on while
driving for use as a rearview mirror.
Carefully read and understand all manufacturer’s
instructions provided in your owner’s packet prior
to operating.
Extreme care must be exercised when passing another
vehicle. A vehicle with a trailer attached will require
additional passing distance than when driving without
a trailer. Because your vehicle and trailer is longer
than your vehicle alone, you will also need to go much
further ahead of the passed vehicle before you can
return to your lane.
• Keep right foot on the brake pedal.
• Shift gear selector lever to position “N”.
• Have a second person place wheel chocks on
downhill side of left and right trailer wheels.
• Slowly release the brake pedal allowing the vehicle
and trailer to roll into chocks until stopped.
• Firmly depress parking brake pedal.
• Move gear selector lever to position “P”.
• On inclines, turn wheels toward the road curb.
Towing Your Touring Coach
If the key cannot be turned, the ignition lock remains
locked and the vehicle cannot be steered. With the
engine not running, there is no power assistance for
the braking and steering systems. In this case, it is
important to keep in mind that a considerably higher
degree of effort is necessary to brake and steer the
vehicle. The vehicle must not be towed with the front
axle raised and key in position two in the ignition
lock, as the drive wheels could then lock due to the
acceleration skid control (ASR). See the MercedesBenz Sprinter Operators Manual for information on the
Considerable damage may occur if the touring
coach is improperly lifted for towing purposes.
Only qualified professional towing service
companies with proper equipment should be
used. Observe all cautions and warnings in the
Mercedes-Benz Sprinter Operator’s Manual before
towing your touring coach.
Do not tow the vehicle if the key cannot be turned
in the ignition lock.
2018 Interstate
Safety Check List
Your Airstream Touring Coach should be given a
thorough safety check before a trip. Regular use of
the following list will provide safe operation of your
touring coach and will help you spot any malfunctioning
equipment and correct the problem as soon as
possible. The list is to help you and may not be allinclusive.
Failure to heed the following items may cause
damage to the vehicle or personal injury.
Exterior Check List (Before Entering Vehicle)
1. Check condition of tires and keep tires at
recommended inflation pressure per the tire and
loading placard on the driver’s door B-pillar.
2. Turn off remote LPG valve switch.
3. Check that macerator hose, city water hookup,
TV cable/satellite, and all exterior components are
unhooked and properly stowed.
4. Check that all external compartments and filler
openings are properly closed, latched, and/or
5. Check that items stored on exterior of vehicle are
securely tied down.
Interior Check List (Before Driving)
1. It is important that all doors be completely closed
and locked during travel.
2. Turn off living area water pump.
3. Check that refrigerator door is closed and latched if
4. Check that nothing heavy is stored in overhead or
high cabinets, which could fall out and cause injury.
Heavy items should be stored in lower cabinets.
5. Stow galley flip up shelf and pedestal tables.
6. Check that counter tops, range top, and shelves
are clear of even small items that could become
projectiles during an emergency braking or
7. Retract and latch the wet bath wall.
8. Do not cook unless the touring coach is parked
and stable. Hot food or liquid could scald due to a
sudden stop or accident while traveling.
9. Be sure all LPG controls on the appliances are
turned off.
10. Check that any internal stowage is securely held in
11. Check that lights and switches are set in positions
safe for travel.
7. Follow all automotive manufacturer’s
recommendations on checking and filling fluid
12. Adjust the driver’s seat so that you can easily
reach and operate all controls. Make sure seat
is locked in position. Do not adjust driver’s seat
swivel or recline mechanisms while vehicle is
moving. The seat could move unexpectedly
causing loss of control.
8. Check exterior lights and general condition of
13. Check that all passengers have seat belts on
6. Verify if any items stored on exterior of vehicle
would present a clearance problem.
14. The freedom of movement of the brake and
accelerator pedals must not be impaired in any
15. Check rear view mirrors adjustment, inside and
outside. Adjust window coverings if necessary for
maximum visibility.
16. Secure children in a federally-approved child
restraint device.
2018 Interstate
Section 9
MAINTENANCE ������������������������������������������������������������� 9-1
Extended Stays�������������������������������������������������� 9-13
MAINTENANCE SCHEDULE���������������������������������� 9-2
Black Water Tank Flush ������������������������������������� 9-13
REPLACEMENT PARTS��������������������������������� 9-3
Drain System Cleaning ��������������������������� 9-13
Exterior Care�������������������������������������������������������� 9-4
TIRE CARE ������������������������������������������������������������� 9-5
Tire Care Tips ������������������������������������������������������ 9-5
Tire Inspection And Storage��������������������������������� 9-5
BATTERY (MAINTENANCE FREE)������������������������� 9-6
Battery Amp Draw And Testing����������������������������� 9-6
Battery Cleaning �������������������������������������������������� 9-6
Battery Storage����������������������������������������������������� 9-6
LPG SYSTEM ��������������������������������������������������������� 9-7
LPG Tank Remote Fill������������������������������������������ 9-7
Remote Gas Supply Switch ��������������������������������� 9-7
LPG Regulator ����������������������������������������������������� 9-8
LPG Connections������������������������������������������������� 9-8
PLUMBING�������������������������������������������������������������� 9-8
Water system (Self-Contained)����������������������������� 9-8
Water Pump And Strainer������������������������������������� 9-9
Sanitizing ������������������������������������������������������������� 9-9
Drain Valve Locations ���������������������������������������� 9-10
DRAIN AND WASTE SYSTEM ������������������������������9-11
WINTERIZING AND STORAGE���������������������������� 9-13
Touring Coach Winterization������������������������������� 9-14
Water Heater Winterizing������������������������ 9-15
Pump Winterizing������������������������������������ 9-15
Restoring Service����������������������������������������������� 9-15
Toilet������������������������������������������������������������������� 9-16
Toilet Winterizing������������������������������������� 9-16
Removal��������������������������������������������������� 9-16
Maintenance ������������������������������������������� 9-16
ELECTRICAL DIAGRAMS ������������������������������������ 9-17
12-Volt Main Schematic ������������������������������������� 9-17
12-Volt Schematics �������������������������������������������� 9-18
12-Volt Standard Parts List �������������������������������� 9-24
30-Amp 120-Volt Schematic������������������������������� 9-25
30-Amp 120-Volt Standard Parts List ���������������� 9-26
Audio/Video Schematic��������������������������������������� 9-27
Audio/Video Standard Parts List������������������������ 9-28
Standard 30-Amp Circuit Breaker Layout����������� 9-29
Multiplex Circuit Control Board Layout��������������� 9-30
Macerator Pump �������������������������������������������������9-11
Multiplex Networking Diagram And
Switch Panel Layout������������������������������� 9-31
Macerator Applications�����������������������������9-11
Solar Panel Wiring ��������������������������������������������� 9-32
Emptying The Black And Gray
Water Holding Tanks �������������������� 9-12
Locations For Solar Panel Wiring ����������� 9-32
Macerator Impeller Release Feature������� 9-12
FAQS AND ANSWERS ����������������������������������������� 9-33
Manual Operation ����������������������������������� 9-12
2018 Interstate
Maintenance Schedule
Failure to maintain your touring coach can cause premature and unexpected parts breakage and/or erratic
operation that may be hazardous.
See appliance manufacturer’s literature for further information.
Every 1,000 miles or 60 days
Every 10,000 miles or 6 months
Visually inspect battery and
cables for corrosion.
Inspect and rotate.
Smoke and CO
Test and replace battery as
Spare Tire Carrier
Lubricate moving parts.
Check tire pressure (See
Windows, and Door
Clean with mild detergent and
coat with “Slipicone.”
GFI Circuit Breaker
Test and record.
Every 5,000 miles or 90 days
Door Step
Lubricate and inspect moving
LPG Regulator
Check bottom vent for
Wheel Lug Nuts
See Specification Chart in
this manual for wheel torque
7-Way Plug
Spray with contact cleaner.
Every year
Clean, neutralize, and coat
terminals with petroleum jelly.
LPG Tank
Have purged by LPG supplier.
Check and reseal exterior
seams, windows, lights, and
vents as needed.
Every 100-150 hours
Change oil after the first 20
hours of run time.
Change oil thereafter every
100-150 hours.
To break in the Onan generator run the generator
at 50 percent load for two hours, then at 75 percent
load for two hours. Refer to the Onan’s manual for
more details.
2018 Interstate
Suggested Maintenance and Replacement Parts
(Part numbers listed are Airstream part numbers and can be ordered by calling a certified Airstream dealer.)
Always replace the bulb or light fixture with the correct bulb for that light or matching fixture. Failure to
heed this warning could cause fire, property damage, personal injury, or death.
Exterior 12-Volt Lighting – For additional exterior lights refer to your Chassis Owner’s manual.
LED Porch Light
PN – 512793
LED Awning Flex Tape Light
PN – 512740
LED Step Flex Tape Light
PN – 512915
License Plate Light
PN – 511294
LED Pin Light
PN – 512909-01
NOTE: Most Exterior Lighting is LED and a replacement fixture will be required.
Interior 12-Volt Lighting
LED Flex Tape Light, 61”
PN – 512659
LED Flex Tape Light, 39”
PN – 512659-02
LED Shower Light
PN – 512376
LED Eyeball Light
PN – 512603
LED Courtesy Light
PN – 512377
LED Spot Light w/Frosted Lens
PN – 512936
LED Reading Light w/Frosted Lens
PN – 512803
LED Linear Utility Light w/Touch Switch, 16”
PN – 512908
LED Linear Utility Light w/Switch, 18”
PN – 512931
LED Dome Light, Surface Mount
PN – 512933
NOTE: Most Interior Lighting is LED and a replacement fixture will be required.
Multiplex System Switch Control Panels
LCD Color Touchscreen, 7”
PN – 513196-02
LCD Touchscreen, 4.3”
PN – 513196-03
Keypad, Entry
PN – 513196-04
Replacement Breakers - USA Breakers
20-15 amp Breaker, Bryant
PN – 510564-08
30 amp Breaker, Bryant
PN – 510564-30
20-20 amp Breaker, Bryant
PN – 510564-2020
20GFI amp Breaker, Bryant
PN – 510564-20GFI
2018 Interstate
Exterior Care
Replacement Rivets
The following exterior care products are recommended
by Airstream. Read and follow label directions. Exterior
sealant should be checked and resealed once a year.
Part Number
Rivet Name
Head Style
Dome Head
Dome Head
0.125 (1/8)
0.125 (1/8)
Walbernize Super Seal (PN - 28433W) - Use to clean
and polish while depositing a reflective, water-proof,
glaze finish. Recommend two applications a year.
Hole Size
Acryl-R Seam Sealer (PN - 28430W-01 [16 oz canGray]) - Use anywhere a fine bead of gray sealant is
Drill Number
Grip Range In
Length Under
Head (Max.
Head Height
(Max. Inches)
Typical Sheer
Strength (lb)*
Typical Tensile
Strength (lb)*
*Values shown are a guide only and may vary
depending upon the application.
Acryl-R Seam Sealer (PN - 28430W-04 [16 oz canWhite]) - Use anywhere a fine bead of White sealant is
Acryl-R Seam Sealer (PN - 28430W-06 [16 oz canClear]) - Use anywhere a fine bead of Clear sealant is
AdSeal Premium Quality Sealant Adhesive (PN
- 365330-01 [10 oz tube-White]) - Use anywhere a
thicker bead of White sealant is required.
AdSeal Premium Quality Sealant Adhesive (PN
- 365330-02 [10 oz tube-Gray]) - Use anywhere a
thicker bead of Gray sealant is required.
AdSeal Premium Quality Sealant Adhesive (PN
- 365330-04 [10 oz tube-Black]) - Use anywhere a
thicker bead of Black sealant is required.
Replacement Filters
Air Conditioner
PN – 690323-322
Touch-up Caulking
Caulk, Seamfil, White
PN – 360301-02
Caulk, Seamfil, Tan
PN – 360301-05
Caulk, Seamfil, A. Sand
PN – 360301-06
Caulk, Seamfil, A. Night
PN – 360301-08
Caulk, Seamfil, C. Walnut PN – 360301-15
Fil-Stik, Black
PN – 28431W-01
Fil-Stik, Gray
PN – 28431W-02
Fil-Stik, White
PN – 28431W-03
Fil-Stik, Light Maple
PN – 28431W-04
2018 Interstate
Tire Care
The most important function of tires is to provide
traction while moving and grip when steering or
stopping. The tires on your touring coach are designed
for highway use and must be properly maintained in
order to maximize tire life, as well to provide a safe
mode of transportation.
Tire Care Tips
To reduce the risk of tire failure, we strongly
recommend the following:
1. Check the pressure in your tires, including your
spare, at least monthly when the tires are cool
(after the vehicle has been stopped for 3 hours and
then driven less than 1 mi). Do not reduce pressure
when tires are hot. Use a tire gauge to check
pressure and maintain it at the recommended level.
2. Never overload your tires. Heed the maximum
load-carrying capability of your tires.
3. Check your tires frequently for scrapes, bulges,
separations, cuts, or snags resulting from use. See
your tire dealer immediately if any such condition is
4. Never operate your vehicle in excess of lawful
speeds, the maximum speeds justified by driving
conditions, or in excess of speeds recommended
for the tires you are using.
5. Make every effort to avoid running over objects
that may damage the tire through impact or cutting,
such as chuck holes, glass, metal, etc.
Tire Inspection and Storage
Before taking your touring coach on a trip or when
removing it from an extended storage period, make
it a practice to inspect the overall condition of your
tires. Check for any type of condition or damage that
might result in failure. A thorough check should include
both inside and outside sidewalls, tread area, and
the condition of hardware such as valve stems, valve
caps, and wheels. The tread should be checked for any
unusual wear, cracking, penetrations, and/or cuts. An
uneven wear pattern can indicate misalignment or worn
suspension parts.
Since many touring coach’s are used seasonally and
sometimes stored for extended times, it is possible
that tires will take many years to wear out. Tires, as
any rubber product, will age over time. If tires show
cracking in the sidewall or tread surfaces that are more
than 2/32-in. deep, they should be replaced before
your next trip or vacation. Store your touring coach
in a cool, dry area away from major heat sources
and extreme cold. An enclosed storage area is best
with no exposure to electromagnetic sources such
as generators or transformers. If you must keep your
touring coach outside, cover your tires from direct
sunlight. Take your touring coach to your tire dealer for
service to check or correct any of these conditions.
California Tire Chain notice: Your motorhome may
not be operated with tire chains.
6. Never drive on smooth tires. Tires should be
removed when 2/32 in. of tread depth remains. In
most states, it is illegal to drive with less than 2/32
in. remaining tread depth.
7. Park out of the sun whenever possible when in
warm climates. In desert regions, use tire covers to
prevent ultra violet light deterioration to tires.
2018 Interstate
Battery (Maintenance Free)
Your Airstream Touring Coach is factory-equipped with
a 12V, deep cycle AGM GPL-24T Lifeline battery.
Battery Amp Draw and Testing
For maximum battery life in AGM applications, do
not discharge the battery below 50%. Discharging
the battery to 100% will shorten the batteries life. A
battery that is allowed to completely lose its charge will
never regain its original power or a full charge. Once a
battery is discharged, it will begin to sulfate and lose its
capacity and longevity.
For proper load testing the battery should be fully
charged and the voltage should be greater than 12.8
volts. A typical load test should be 3 times the amp
hours for 15 seconds. At the end of 15 seconds the
voltage of the battery should stay above 9.6 volts. If the
battery cannot reach a fully charged voltage of 12.8 or
greater the batteries will need to be equalized.
When checking the state of charge the battery
needs to have been disconnected from a charging
source and any loads for a minimum of four hours.
When removing the batteries verify that shoreline
power is not connected and/or the engine is not
running. Risk of electrical shock may be present.
The following chart shows the approximate % of
charge SOC (State of charge) vs. OCV (Open circuit
State of Charge (%)
OCV per 12V battery
12.8 or greater
11.6 or less
Listed voltage levels are approximate and give an
indication of the state of charge of a battery at rest. As
the battery ages these voltage measurements will be
For more information on charging, storing, and
servicing your batteries please visit Lifeline’s website at
Battery Cleaning
Battery maintenance is an important issue. Maintain a
clean battery top and check terminals and cables for
tightness and cleanliness. A dirty battery will dissipate
its charge through surface contamination. Clean the
battery top with a damp cloth and dry thoroughly.
To ensure maximum battery capacity on the charge
and discharge, the battery terminals and the inside
portion of the cable connector should be scraped
or brushed. The terminals should be tight and free
of corrosion. The battery should be cleaned using
a baking soda and water mix, with a ratio of two
tablespoons of baking soda to a pint of water. The
cable connection should be cleaned and tightened
For battery service or replacement, go to a service
station or dealer who sells and services the make of
battery installed in your touring coach.
Reconnect the battery cables to the correct
battery posts.
Battery Storage
During the winter, the batteries should be removed
from the touring coach and stored in a cool, dry place,
where there is no danger of freezing. While in storage,
batteries should be boost charged every 90 days or
when the open circuit voltage drops to 12.5 volts.
This OCV corresponds to approximately 75% state of
charge. The following recommendations may be helpful
if the battery is to be stored:
• When storing the battery in a vehicle or vessel, it is
not necessary to leave it on charge. Disconnect the
negative battery cable. This will prevent inadvertent
discharging of the battery which may lead to a
complete discharge.
• Fully charge the battery before putting it in storage
and store in a cool place.
When storing your Atlas and leaving the house,
batteries in place, it is recommended that the
vehicle be plugged into a 120-volt, 30-amp shoreline
connection for 24 to 48 hours every 30 days.
A battery will self-discharge 1-3% per month at 80
2018 Interstate
LPG System
Remote Gas Supply Switch
Your touring coach is equipped with a permanentlymounted tank for LPG with a remote fill and remote
gas supply shut off switch. LPG burns with a clean blue
flame. LPG is used where subfreezing temperatures
are common, since it boils at -44°F. Keep in mind at
these temperatures the BTU is lower than at 30°F. How
long a full tank of gas will last is dependent on usage.
In cold weather, when you are using the furnace, using
large amounts of hot water, or cooking extensively,
you will naturally use more LPG than you will in
warm weather, or when doing limited cooking. On the
average, with normal cooking and other appliance use,
you can probably count a few weeks of usage from the
tank, if you are not running your generator.
If you have allowed the tank to run out, air may
have gotten into the lines. In this event the air must
be allowed to bleed from the lines before lighting
appliances. Follow the appliance manufacturer’s
instructions and light the appliance closest to the LPG
supply tank. Then move to the next closest, etc.
LPG Tank Remote Fill
The LPG tank is filled by accessing the remote
fill hookup located in the compartment under the
passenger side rear fender behind the rear wheels.
Be sure the fill is free of dirt. It may help to remind
your LPG supplier to only use a clean fill hose to fill
your tank. Turn off the remote switch when the LPG
system is not in use, as it draws 12-volt current from
the batteries.
Only certified LPG suppliers should fill the LPG
tank. Turn remote gas supply switch off before
filling or refilling LPG tank.
Always shut off the LPG gas when refueling the
touring coach.
2018 Interstate
A remote switch for shutting off the gas to all
appliances is located in the same compartment. The
switch activates an electric solenoid which opens and
closes, shutting the gas off at the tank. This switch
should be turned off during the filling of the LPG tank.
Gas lines should be checked periodically for leaks with
ammonia-free soapy water.
Be careful when working around electricity, as it
can carry dangerous amperage and cause sparks
or combustion.
The electric gas shut-off solenoid closes
automatically when 12-volt power is disconnected.
It will reopen when power is restored.
All LP gas appliances must be turned off
during refueling of touring coach fuel tank and
permanently-mounted LPG tank.
Do not use open flame to search for problems. If
gas can be smelled, appliance pilots fail to stay
on, or any other abnormal situation occurs, use
the remote supply switch to shut off the tank valve
immediately and call on a qualified LPG service
center or Airstream Service Center.
LPG Regulator
The LPG regulators used on Airstream Touring Coach’s
are designed for low-pressure service, with a normal
outlet pressure setting of 11.5-in. water column. Only
personnel trained in the proper procedures, codes,
standards, etc., should service regulators. Have the
regulator inspected each time the tank is refilled.
Replace any regulator that has had water in the spring
case, or shows evidence of external corrosion or
corrosion inside the spring case.
Moisture in the LPG tank will cause a malfunction
of the regulator in controlling proper pressure.
This may result in the flame lifting off the burner or
going out frequently. Many refueling stations will
add approximately ¼ to ½ gal of alcohol allowing
moisture to pass through the regulator without the
formation of ice crystals.
LPG Connections
A quick-connect, low-pressure LPG connection is
located under the passenger side rear quarter panel
behind the dual wheels. It is a utility connection to use
for an outside grill or other LPG appliance. Check that
the remote LPG shut off switch is turned completely
off. Slide the collar on the female end back and plug
the male hose into the connection. Release the collar
and check that the hose is properly connected by
giving a firm pull on the hose. Turn the LPG remote
shut off switch on and recheck all connections to
the appliances and quick connection to be sure no
leaks are present. Follow all instructions, cautions,
and warnings in this manual when connecting and
disconnecting appliances.
Water System (Self-Contained)
The fresh water system consists of a city water
hookup, fresh water tank gravity fill, fresh water tank
and drain valve, water pump, hot and cold water lines,
water heater, fresh water line low point drain valves,
and faucets. Full explanations on the locations and use
of these features are explained in this section.
Before using a water system, check that the water
heater bypass valve is turned to the use position. See
Winterizing and Storage for further information on the
bypass. Check that the water heaters drain valve is
closed. Close all low point drain valves and the fresh
water tank drain valve.
Fill the water tank by opening the exterior gravity
feed water fill door. A high-pressure RV/Marine FDA
approved drinking water hose of at least ½-in. diameter
made from material that is tasteless, odorless, and
non-toxic can now be inserted, or use a clean bucket
and funnel to fill the tank. It’s a good idea to let the
water run through a hose for a short time to flush it out.
RVers sometimes fill their tanks with “home” water to
avoid strange water that may be distasteful to them on
short outings. Remember, the more water you carry in
the Fresh Water tank, the less cargo carrying capacity
you have for other items. The amount of water in the
tank may be checked on the Multiplex Control Panel.
Because the water heater is tankless it does not need
to be filled. However, if the system has not been used
for some time or is being used for the first time since
draining the lines it is normal for air to have gotten into
the lines. To expel the air, open the hot side of either
the galley, wet-bath, or exterior shower faucet and turn
on the water pump or connect to an exterior city water
source. Close the cold side of all faucets. For some
time the open faucet will only sputter. This is because
the air is being pushed out through the lines. Once the
air is expelled a steady stream of water will come from
the faucet.
Now open a cold faucet. It will sputter for a short time,
but will soon expel a steady stream. All other faucets
can now be opened until all air is expelled.
Once the system is filled with water and the faucets are
closed, the water pump will shut off. When a faucet is
opened, the pump will come back on automatically. If
the faucet is just barely open, it is normal for the pump
to cycle on and off rapidly.
It is normal for a pump to occasionally cycle when all
faucets are off to keep the water pressure at the set
point. However, if it cycles frequently (e.g. more than
a few times an hour) the plumbing system, pump, and
pump strainer should be checked to be sure it is not
losing pressure through a slow water leak or back
through the pump.
To prevent equipment damage, the water heater
should only be started after the water system is
primed and ready for use.
Turn the water pump off when the touring coach is
left unattended.
2018 Interstate
Water Pump and Strainer
The water pump is controlled by the Multiplex Systems
control panels. Once the switch is turned on, the pump
will run until the water pressure reaches approximately
55 psi. At this point, an internal pressure switch will
shut it off. When a faucet is opened, the water pressure
will drop and the pump will start to run again.
As a general rule, the water pump should be turned off
while using a city water hookup; however, the water
pressure at some campgrounds may be low. The water
pump can be turned on to assist the city water hookup
pressure. Be sure there is some water in the fresh
water tank. The pump will only use the water that is
needed out of the tank to bring the pressure up to the
usual standard of 55 psi.
The water pump and strainer are located under the
galley accessed by removing the galley drawer, or
below the refrigerator and accessed by removing the
panel, depending on the model. The strainer should
be visually checked for accumulation of sand or debris
that could affect water flow.
Failure to check the quick disconnect fitting for
water leaks when reinstalling inlet and outlet
hoses or the water pump strainer may cause the
pump system to leak, causing damage to personal
Potable water systems require periodic maintenance
to deliver a consistent flow of fresh water. Depending
on use and the environment the system is subject to,
sanitizing is recommended prior to storing and before
using the water system after a period of storage.
Systems with new components, or ones that have been
subjected to contamination should also be disinfected
as follows:
1. Use one of the following methods to determine the
amount of common household bleach needed to
sanitize the tank.
a. Multiply “gallons of tank capacity” by 0.13;
the result is the ounces of bleach needed to
sanitize the tank.
b. Multiply “Liters of tank capacity” by 1.0; the
result is the milliliters of bleach needed to
sanitize the tank.
1. Pump
2. Housing Cap
3. Strainer
To clean the strainer screen: with the clear plastic at
the top, press on the sides of the strainer releasing
the tabs holding the clear plastic top in place, hold the
sides in, and pull straight up on the clear plastic top to
remove the screen assembly. Rinse all debris from the
screen. Replace the screen assembly by aligning the
screen in the seating groves and pressing gently down
until tabs catch and hold the clear plastic top in place.
The inlet and outlet hoses and the strainer assembly
are held in place by self-sealing, blue, quick-connect
fittings. To disconnect a hose or the strainer, grasp
the blue tab on the female fitting by the grooved finger
edges and pull straight out on the tab. This will release
the male fitting connected to the hoses and strainer.
Be sure that both the female and male fitting on the
disconnect are free of all debris and are not damaged
before replacing. Check the pump system for leaks any
time the disconnect fittings on the hoses and/or strainer
are removed.
2018 Interstate
2. Mix the proper amount of bleach into a container of
3. Pour the correct amount of solution (water/bleach)
into the Fresh Water tank and fill with potable
4. Open all faucets (hot and cold) allowing the water
to run until the distinct odor of chlorine is detected.
5. The standard solution must have 4 hours of contact
time to disinfect completely. Doubling the solution
concentration will allow for contact time of one (1)
6. When the contact time is completed, drain the tank.
Refill with potable water and flush the plumbing of
all sanitizing solution.
The sanitizing procedure outlined above is in
conformance with the approved procedures of
RVIA ANSI A 119.2 and the U.S. Public Health
Drain Valve Locations (Lounge)
1 Water Heater
Bypass Valve
Under Driver Side
2 Drain Valves
Under Galley
2 Drain Valves Under
Curbside Lounge/Bed
The fresh water system has four fresh water line low point drain valves. There are two under the galley, accessed
by removing the drawer below the microwave. Two are located under the lounge, on the curbside, accessed by
removing the cup holders. The cup holders lift up and out of the armrest. The water heater bypass valve is located
under the lounge on the drivers side.
The fresh water tank drain plug is located on the front of the tank pan under the touring coach.
Drain Valve Locations (Grand Tour)
1 Water Heater
Bypass Valve
Under Driver Side
2 Drain Valves
Behind Panel
2 Drain Valves Under
Curbside Lounge/Bed
The fresh water system has four fresh water line low point drain valves. There are two below the refrigerator,
accessed by removing the vent below the refrigerator. These drain valves are also the exterior shower water lines
and the shower hose must be attached to drain. Two are located under the curbside lounge or bed, depending
on the model, accessed by removing the cup holders or lifting the mattress. The cup holders lift up and out of the
armrest. The water heater bypass valve is located under the lounge or bed on the drivers side.
2018 Interstate
Drain and Waste System
Your touring coach has a drain and waste system that
includes waste-holding tanks made from corrosionfree, molded plastic, with trouble-free dump valves.
The main (Black Water) holding tank enables you to
use the toilet for several days away from disposal
facilities. The wastewater from the sink, shower, bath,
and lavatory drains into the auxiliary (Gray Water)
holding tank.
Each tank has its own dump valve with both tanks
draining through a common outlet. Therefore, only one
sewer hose connection is needed when hooking up to
a dump station.
Almost all campgrounds will have dumping facilities.
Park directories, such as Woodalls and Rand McNally,
also list dumping stations. Furthermore, the navigation
systems GPS can be used to locate nearby dumping
stations or highlight stations along your route.
Check your monitor panel frequently (main Multiplex
control panel or Seelevel monitor). When the Black
Water holding tank is completely full, sewage cannot
be emptied from the toilet bowl. If the Gray Water
holding tank is overfilled, drain water will back up into
the shower floor pan and cause an unpleasant cleaning
job. Never drain the tanks at any place other than an
approved dumping station.
Never put wet strength paper towels or tissues
in your holding tank since they will not dissolve
and can catch in the mechanism of the dump
valve. Colored toilet tissue is slower to dissolve
than white. Most motorhome accessory stores
offer tissue designed for RVs that will completely
Macerator Pump
The portable waste pump is the ideal solution for
emptying holding tanks on touring coach’s and avoiding
dump stations. The macerator section grinds waste
down to a particle size of 1/8-in. maximum. The waste
pump will macerate and pump all waste and tissue
normally found in recreational vehicle waste systems.
The waste hose is pressurized when operating the
macerator pump. Secure the loose hose end at the
disposal facility with supplied inlet adaptors before
turning on pump.
2018 Interstate
The high-pressure waste hose is stored on an electric
hose reel and connected to the Discharge Port
Adaptor. It has a threaded, drip-proof valve with a
versatile, two-size, threaded adaptor allowing the valve
to be connected to 3 sizes of threaded inlets, including
an exterior home sewer clean-out. The adaptor snaps
over the valve threads. A rubber ring is also provided
to lodge into a non-threaded inlet. If the rubber ring
seems loose when used, Airstream recommends using
some type of weight to further secure the hose.
Each holding tank, the macerator pump, and macerator
pump electric hose reel have individual switches which
are located in the roadside utility compartment. Each
valve switch has a light that illuminates to let you know
the valve is opened. Pressing a dump valve switch and
holding it for 2-3 seconds until it is lit opens a holding
tank valve. Pressing it again for 2-3 seconds closes it.
The macerator pump has an ON/OFF toggle switch.
The reel has a switch for releasing and retracting
the hose, once the hose is released it is deployed
manually. To retract the hose, press and hold the
retract button while guiding the hose in place.
Do not run Macerator pump more than 15 minutes
continuously. Do not run the Macerator pump dry
for more than 30 seconds. THE MACERATOR WILL
NAPKINS OR RAGS. Never put wet strength paper
towels, tissues, or sanitary napkins in your holding
tank. They will not dissolve and will jam the
mechanism of the dump valve and the macerator
pump impeller.
Macerator Applications
Aux. Tank
Dump Station Holding Tank
or Home Sewer
• Empty holding tanks when no dump stations are
• Transfer waste from holding tank to an auxiliary tank.
• The macerator pump can be used to empty the
holding tank into any convenient sewer receiver such
as a sewer clean-out at your home.
Emptying the Black and Gray Water Holding Tanks
Macerator Impeller Release Feature
1. Remove the high pressure waste hose by opening
the hose reel compartment door and momentarily
pressing the “release” switch. Once released the
hose can be manually pulled out. Secure the hose
at the disposal facility inlet using the threaded or
rubber adaptor and open the drip proof valve on
the end of the hose.
After long periods of non-use, a stuck impeller can
be easily broken loose with a screwdriver inserted in
the motor shaft slot. Remove the rubber boot, turn the
shaft clockwise, and replace the rubber boot.
Manual Operation
In case of electric system failure, manually pull/push
the arm located under the vehicle to open and close
the valve.
The pressure from the macerator pump may push
the hose from the inlet if the hose is not secured
2. Open the Black Water valve. Empty the Black
Water tank first and the Gray Water tank second,
using the Gray Water to help flush the pump and
hose of Black Water sewage.
3. Turn on macerator pump to liquefy and pump out
the solids in the tank.
4. When black tank is empty, turn off the pump.
5. Open the Gray Water tank valve and turn on the
pump. Run until just before the pump runs dry. Any
trickle of gray water left will remain in discharge
hose behind drip proof valve and is typical.
Remember, running the pump dry for more than 30
seconds could damage the pump.
6. Turn the drip-proof valve off and remove the hose
adaptor from the dump station inlet. Retract the
hose into the hose reel by holding the switch in
the “retract” position. Be sure to guide the hose
back and forth onto the reel evenly. Close the
compartment door.
Watch all connections while dumping. Close dump
valve immediately, turn off pump, and close hose
drip-proof valve if a leak is noticed.
2018 Interstate
Extended Stays
When you are in a park with a disposal facility, empty
the tanks every few days or whenever they become
almost full. Pumping a large volume of liquid through
the tanks at a time will keep toilet paper and other
solids completely washed away. Remember to empty
the Black Water tank first and then the Gray Water tank
using the Gray Water to flush the system. This practice
will avoid the accumulation of solids in the tank, which
could lead to an unpleasant cleaning job.
Should solids accumulate, fill the tank about half full
with water with the black tank flush, and then drive
the touring coach for a few miles. Don’t wait until the
tank is packed solid. The turbulence and surging of the
water will usually dissolve the solids into a suspension
so the tank can be drained. Draining the tanks as
described will protect them from freezing during
Black Water Tank Flush
Inside the macerator hose reel utility compartment is
a water hose connector for the “black tank flush.” To
use, hook up a garden hose and turn it on. Within the
tank, a head with multiple holes will spray the interior
surface of the tank. Once the tank is about half full, turn
the garden hose off and flush the water from the tank
using the macerator pump. The gate valve should be
closed for the first couple of minutes, and then opened
to let the water out in a rush. Repeat as needed. It
is recommended the tank flush be used on a regular
basis or the holes on the spray head may become
Winterizing and Storage
When storing your touring coach, use the same
precautions as you would in your own home in regard
to perishables, ventilation, winterizing, and rain
protection. In addition, for prolonged storage periods,
flush out all the drain lines and waste holding tanks.
Also drain the entire water system, including the
water heater and the Fresh Water tank. Instructions
for draining the water system are explained in the
following paragraphs on winterizing.
Twice a year, or after a long storage period, we
suggest you take your unit into your Airstream dealer
for a check-up and cleaning of the gas-operated
The main consideration in winterizing is to guard
against freezing damage to the fresh water lines, the
waste drain lines, the waste holding tanks, the water
heater, and the batteries.
Sprinter recommends disconnecting the current
to all chassis electric consumers using the battery
isolator switch if the vehicle sits for periods longer
than 2 months. It is located to the right of the
accelerator pedal in the driver’s foot well. Slide the
red release down and pull it off the post. This will
save jump starts, battery charge ups, and possible
battery damage and replacement. The MercedesBenz Sprinter Operator’s Manual describes its
location, operation, and cautions in detail.
In very cold weather, winterizing the motor coach
is recommended to prevent damage to the waste
systems. Use common sense and winterize as
Drain System Cleaning
The only cleaning agents that can be used without
causing harm to the system are household ammonia
and tri-sodium phosphate in small quantities. Do not
use any product that contains any portion of petroleum
distillates. This type of product will attack the rubber
seals of your toilet and dump valve. Also, do not use
any dish detergent or abrasive cleaners. All products
should be marked as approved for ABS drainage
2018 Interstate
Touring Coach Winterization
1. Level the touring coach from side to side and front
to rear, turn the water pump off, and disconnect the
city water.
2. Open all the hot and cold water faucets.
3. Open the low point drain valves for the hot
and cold water lines, the fresh water tank drain
valve, and water heater drain. There are four
fresh water line low point drain valves. Two are
located, depending on the model, under the galley
accessed by removing the drawer below the
microwave or below the refrigerator accessed by
removing the vent below the refrigerator. Two are
located under the curbside lounge accessed by
removing the cup holders. In the twin bed model
two are located under the curbside bed accessed
by lifting the mattress. The fresh water tank drain
plug is located on the front of the tank under the
touring coach. The water heater drain valve is
located on the water heater under the roadside
rear lounge or bed accessed by removing the
service panel.
8. Remove the house batteries from your touring
coach and store in a cool dry place where there
is no danger of freezing. It is very important for
optimum life of your battery to check it periodically
and to keep it fully charged. This is especially
true in winter months, when the temperature may
drop below freezing. If the period of storage is
for 30 days or less, you may turn off the battery
disconnect switch rather than remove the battery.
Continue to check and recharge the battery as
needed, at least weekly in severe weather.
For additional winterizing protection, add RV,
non-toxic antifreeze (approved for drinking water
systems) to your water lines using the following
1. Reconnect all lines except the one to the pump
inlet port and close all drain valves.
2. Turn the water heater bypass valve to its open
position, see diagram below. The valve is located
under the rear lounge or roadside bed depending
on the model.
4. Follow the winterizing instructions for your toilet in
this manual.
5. While the water is draining from the systems
remove, drain, and store the wet bath and the
exterior shower hoses and shower heads.
6. After the water has stopped running, apply at most
30 lb of air pressure at the city water inlet. This
can be accomplished at a service station if no air
compressor is available. Air fittings with regulators
can be purchased for the city water inlet. Be sure
the toilet flush valve, toilet shut off valve, all drain
valves, and all faucets are open and the pump
outlet hose is disconnected. 50 lb of air pressure
can be accomplished only if the water heater
bypass valve has been set to its bypass position. If
more than 30 lbs of pressure is used on the water
heater damage could occur.
7. Water pump: Remove quick-connect outlet fitting
from the pump and turn the pump on briefly to
pump out any remaining water from the pump head
and lines from the tank. Check the water pump
strainer to be sure no water remains. There should
be very little water if the tank is drained. Be sure
to have a catch pan or a rag under the pump to
prevent water from spilling into the touring coach.
Leave the fittings disconnected from the pump until
the system is ready to be used again. Leave a note
on the water pump switch that the plumbing is not
3. Attach a length of hose to the water pump inlet
port. This piece of hose should be long enough
for the free end to be inserted into and reach the
bottom of a RV, non-toxic antifreeze container.
4. Check that all interior water faucets are still open.
5. Insert hose length into container containing, RV,
non-toxic antifreeze, turn the pump on, and run
the water pump until the RV, non-toxic antifreeze
solution fills all water lines. Flush toilet.
6. Open exterior shower faucet until RV, non-toxic
antifreeze comes out of the hose, shut off the
valve, and remove the drain valve/hose assembly.
7. Close water fixtures as the RV, non-toxic antifreeze
begins to come out. Shut off the pump when
RV, non-toxic antifreeze has been distributed
throughout the system, and then reopen all faucets
to relieve pump pressure.
8. Disconnect the hose length from the pump inlet
fitting, and reconnect water system inlet line.
2018 Interstate
Water Heater Winterizing
Pump Winterizing
If the touring coach is to be stored during winter
months, the water heater system must be drained to
prevent damage from freezing. Once drained RV nontoxic antifreeze can be added.
Plan your winterizing and storage ahead, and be sure
the holding tanks are drained and flushed thoroughly.
This is very important, as the frozen sewage and water
could seriously damage the system. After dumping the
tanks, add a quart or two of RV, non-toxic antifreeze to
one of the holding tanks and start the macerator pump.
Run the pump until the RV, non-toxic antifreeze comes
out the end of the pump hose. Leave dump valves
open. As extra protection, open the toilet valve and add
a quart of RV, non-toxic antifreeze to the Black Water
tank and pour a quart of RV, non-toxic antifreeze into
a sink drain to protect the holding tanks, valves, and
pump from residual water freezing.
1. Turn off electrical power to water heater.
2. Shut off gas supply to water heater.
3. Turn off pressure pump on water system.
4. Open both hot and cold water faucets.
5. Remove service panel to access system drain
valve. The water heater is located under the
roadside rear lounge or bed.
Restoring Service
1. Re-install the fully charged house battery.
2. Close the low point drain valves, holding tank
dump valves, water faucets, and fresh water tank
3. Reconnect water pump line.
4. Add water to the fresh water tank.
5. Turn the water pump on.
6. Open and close faucet valves one at a time until
water runs clear at all faucets signaling RV, nontoxic antifreeze is flushed out of lines. Go back and
recheck water clarity at all faucets.
7. Turn off water pump.
6. Turn drain valve knob counterclockwise to drain.
7. Follow the Winterizing and Storage instructions for
draining entire water system.
8. Hook up city water, open faucet valves, and
recheck water clarity.
9. Close water heater drain valve and reset water
heater bypass valve to normal operating position.
System will have to be refilled with water and all air
removed from lines before unit will re-light.
2018 Interstate
Toilet Winterizing
If the bowl-sealing blade does not operate freely after
extended use, it may be restored to its original, smooth
operating condition by applying a light film of silicone
spray to the blade. To clean the toilet use Thetford
Aqua Bowl or any other high grade, non-abrasive
cleaner. Do not use highly concentrated or high acid
content household cleaners. They may damage the
rubber seals.
Draining Method: Turn off touring coach’s water supply.
Drain toilet bowl. Disconnect supply line at water valve.
Completely drain the toilet’s water supply line.
Antifreeze Method: Use RV, non-toxic antifreeze only.
To avoid damage when using air pressure to blow
water from the lines, make sure toilet valve is in the
open position.
If water is frozen in the toilet, do not attempt to
flush until the ice thaws. Never use automotive
type antifreeze.
1. Shut off water valve behind toilet or main water
supply and flush toilet.
2. Disconnect water supply line from toilet. You will
probably find a small mirror very useful.
3. Remove mounting nuts.
4. Cover riser or tank inlet with cardboard to prevent
debris from falling into tank.
Always replace flange seal when toilet has been
1. Leaks:
a. Back of toilet: check water supply line connection at water valve. Secure or tighten as necessary. If leak persists from water valve, replace.
b. Vacuum breaker leaks while flushing: replace
vacuum breaker or water module, depending
on model.
c. Between closet flange and toilet: check flange
nuts for tightness. If leak continues, remove
toilet and check flange height. Use Thetford
spacers to adjust, if necessary, to 7/16-in.
above floor. Replace flange seal.
2. Toilet won’t hold water:
a. Check for and remove any debris from bladeball seal track.
b. Check blade/ball seal compression mechanism. If blade/ball seal is worn, replace.
3. Harder than normal pedal or hand lever operation:
Apply light film of Thetford Toilet Seal Lubricant &
Conditioner or silicone spray to blade/ball. (Note:
To avoid damage, do not use spray lubricants other
than silicone.)
4. Poor flush: Pedals or hand levers must be held
fully open during flush. A good flush should be
obtained within 2 to 3 seconds. If problem persists,
remove the water supply line and check flow rate.
The flow rate should be at least 10 qt (9.5 L) per
2018 Interstate
A/S# 386275 & 386277
WARNING: (Service)
2018 Interstate
2 DPDT 5
1 MOM.
CIR. #
Note #1O
Note #2O
Electrical Diagrams
12-Volt Main Schematic
12-Volt Schematic
2018 Interstate
12-Volt Schematic
2018 Interstate
12-Volt Schematic
2018 Interstate
12-Volt Schematic
2018 Interstate
12-Volt Schematic
2018 Interstate
12-Volt Schematic
2018 Interstate
12-Volt Standard Parts List
2018 Interstate
2018 Interstate
120VAC 60Hz
A/C (OPT.)
30-Amp 120-Volt Schematic
30-Amp 120-Volt Standard Parts list
2018 Interstate
2 (YEL)
M4e (RED)
N/C A1
N/C A2
N/C A3
TERM. 58D A6
TERM. 15R A7
1 (+R.F. SPKR)
2 (+L.F. SPKR)
4 (+12V BAT.)
5 (-R.F. SPKR)
6 (-L.F. SPKR)
8 (PWR ANT.)
9 (N/C)
(+R.R. SPKR)
(+R.L. SPKR)
(-R.R. SPKR)
(-R.L. SPKR)
ref. 513013
(for CATV connection (w/ roof Sat. install))
(for roof Sat. install)
TVa2 is removed to install a
Satellite receiver option.
RED 4 +12
WHT(150) BLK 1 GND
N/C 2 NC
TVa2a (SAT. OPT.)
(for SAT. connection (w/ Ground Sat. install))
2018 Interstate
TVa2b (SAT. OPT.)
Audio/Video Schematic
Audio/Video Standard Parts List
2018 Interstate
Standard 30-Amp Circuit Breaker Layout
20 20 20 20
Circuit 1. 30 amp, main
Circuit 2. 20 amp, water heater
Circuit 3. 20 amp, air conditioner
Circuit 4. 20 amp, inverter
Circuit 5. 20 amp, microwave, EMS
Circuit 6. 20 amp, GFCI receptacles.
Breaker label content may vary.
2018 Interstate
Multiplex Circuit Control Board Layout
2018 Interstate
Multiplex Networking Diagram and Switch Panel Layout
2018 Interstate
Solar Panel Wiring
Locations for solar panel wiring
A manual on the use of the solar system is included
with the Airstream Owner’s Packet. Please read and
understand all information before operating the system.
All wires are located, depending on the model, under
the roadside jumper seat or the roadside twin bed. To
access remove the decorative door at the bottom of the
jumper seat or lift up the mattress to gain access to a
door below the twin bed.
The charge controller senses the actual battery charge
and regulates the charging to prevent over charging.
The system requires the 12-volt feed from the battery
to operate.
The following diagram depicts the way Airstream wires
the solar system and is the recommended wiring for
replacement solar systems.
10. Ga. Yellow
10 Ga. Green
Ground Buss
10 amp Fuse
6 Ga. Red
6 Ga. Black
6 Ga. Black
12 Ga. Black
6 Ga. Red
Solar Panel
12 Ga. Red
50 Amp Breaker
Battery Breaker
Buss bar
10 Amp Inline Fuse within
12” of battery
Cat Five Patch Cable
2018 Interstate
FAQs and Answers
1. When I hit my 12-volt remote kill switch, at the
sliding door, it does not turn on the 12-volt
Answer: There could be two issues here. The first is
that the batteries are below 8 VDC. If this is the case,
there is not enough power to activate the switch. The
second issue is that the remote is in the disabled
position at the manual knob under the lounge. (Refer to
Section 5 - Interior, for more information.)
2. What should I do to maintain my generator?
Answer: During the initial break in period, you will need
to check your oil every 4 hours during the first 20 hours
of operation. Once you reach 20 hours of operation,
you will need to change the oil. (Refer to the Onans
Owner’s manual for more information)
3. My generator stalls out or quits running if I turn
a corner.
Answer: Make sure you check the oil level. There is a
sensor built into the generator that will shut the engine
down if it is too low. Turning the corner or stopping
quickly while oil is low can cause this to happen.
4. What size batteries are in my Airstream
Answer: Interstate models have Lifeline GPL-24T
5. My generator will not run properly while I am
showing I have ¼ tank of LPG; however, it runs
fine when tank is showing ½ or more.
Answer: This could be a demand issue. If you are
using other appliances, the outside temperature is
below 32°F, and the BTU output is lower than at 72°F,
the generator will not run properly. This would cause
the generator to stall out or run poorly by not creating
the proper 120 volts of power.
6. What is the battery disconnect switch function?
Answer: The switch is used to cut power when the
Interstate is not being used or put into storage to
preserve battery charge. It disengages or engages
the 12-volt power supply from the house batteries to
everything but the LPG detector, CO detector, tank
heaters, power lounge, and Magnum invertor.
2018 Interstate
7. Do you recommend using a surge protector
when plugged into shore power?
Answer: Your Airstream is breaker protected. However,
with the use of more personal electronic devices and
the number of motorhome users in parks, added
protection is always a plus.
8. What is my 1000-watt Magnum inverter
Answer: It is powering both the front and rear TVs and
the Blu-Ray DVD player. There is an additional outlet
behind the driver’s seat as well. This plug is designed
for no more than 1000 watts combined power, and is
intended for charging things such as laptops, phones,
and TV usage. Plugging in items such as vacuums,
hairdryers, etc. may harm the system.
9. I have an alarm going off at my sliding door.
Answer: Make sure your step and awnings are
completely closed. If either of these are not properly
closed, and the engine is running, it will cause the
alarm to sound.
1. Do I need a water regulator?
Answer: No, your Airstream is equipped with a built in
regulator rated for 50 psi.
2. How do I get fresh water into my Interstate?
Answer: You can use the on board fresh water tank
and 12-volt pump for your water supply when camping
in a remote area, or hook to an external water source
via potable water hose to exterior water inlet when
parked at a campground.
3. What is the difference between a Gray Water
tank and the Black Water tank?
Answer: The Gray Water tank holds water from shower
and sink drains. The Black Water tank holds sewer
water from the toilet.
4. Can I run the macerator pump if there is no
water going through it?
Answer: No, it will burn the macerator up if it is run dry
for more the 10-30 seconds. Also, you should not run it
more than 15 minutes continuously.
5. How do I use my Black Water tank flush?
3. Where can I find my Interstate’s serial number?
Answer: First, empty your Black Water tank, and then
close your Black Water tank valve. Hook up your hose
to the external hookup, run water through for a couple
minutes, and then open the valve. Turn macerator
pump on to empty the tank. Do this a couple times until
the tank is clear. (Do not run macerator pump if tank is
Answer: A label is attached on the roadside D B-pillar
or the passenger’s door. This label will also provide the
inflation pressure of the tires and weight specifications.
6. My Gray Water valve will not open while I have
the Black Water valve open.
Answer: Turn the power on and set the thermostat
between 3 and 4. You can make further adjustments
to suit your personal requirements after the box has
cooled down. Allow the refrigerator to come down to
temperature before loading with product. Setting the
thermostat to a higher setting, e.g. 7, will not decrease
the time required for the unit to cool down to its normal
operating temperature. AC/DC units cool at the same
rate on DC as on AC. Normal refrigerator operating
temperatures are 34ºF to 40ºF.
Answer: True, you can only have one valve open at a
1. My TV reception is poor. What can I check?
Answer: Verify if your antenna booster is set to proper
selection (On- for antenna and Off- for cable satellite).
You should also make sure connections are tight on
your TV.
2. Will my TVs and Blu-Ray player operate while
traveling down the highway?
1. I am planning for a trip in my Airstream. How
should I get the refrigerator cooled down?
2. My air conditioner freezes up. What is the
3. Will the rear TV at the lounge play through the
head phone jacks?
Answer: In high humidity conditions, the AC
manufacturer recommends you operate your AC
(manual mode) on the high fan setting and all vents
should be open to have maximum air flow over the
coils; this helps reduce icing. Also, dirty AC filters can
restrict air flow and cause the AC to ice up.
Answer: No, only the front TV will play through the
jacks if the speaker switch is turned off behind it.
1. Can I have my awning out with heavy winds?
4. Does the TV play through the dash stereo?
Answer: No this may cause damage if it is too windy.
However, the awning does have a built in sensor that
will automatically retract the awning.
Answer: Yes, if you have your inverter turned on, the
front and rear TVs will operate.
Answer: No, the TV’s audio is not connected to the
dash radio.
1. Where is my spare tire located and how do I
lower it?
Answer: The spare tire is located under the rear of
the Interstate. The crank access is in the rear storage
compartment under the lounge. The wrench and socket
are located in the Mercedes tool kit at passenger area.
2. How do I jack the Interstate up to change a tire?
2. I want to clean the exterior of my Airstream.
What do you suggest?
Answer: Airstream recommends washing the Interstate
using a mild, auto detergent, safe for clear coated
surfaces. Airstream recommends washing based on
operating conditions, and waxing a minimum of twice
a year. Any automotive wax designed specifically
for clear coated surfaces will provides good wax
Answer: Please refer to the Mercedes owner’s manual.
2018 Interstate
2018 Interstate
2018 Interstate
Air Conditioner 5-18
Air Ride Suspension 7-10
Alarms 2-3
TV 5-16
Satellite 5-17
Appliances 5-18
Awning 6-11
Effects Of Prolonged Occupancy 3-8
Electrical 5-8
Electrical Diagrams 9-17
Emergency Exit 2-9
Energy Management System 5-11
Display Panel 5-12
Exterior Shower 6-4
Exhaust Fan 5-19
Backing Up 8-8
Cleaning 9-6
Storage 9-6
Battery Disconnect Switches 5-13
Battery Separator 5-13
Black Water Tank Flush 9-13
FAQs and Answers 9-33
Faucets 5-5
Fire Extinguisher 2-9
Floor Plans 4-2
Furnace 5-20
Generator 5-12
Camping 3-6
Chemical Sensitivity 2-2
Child Safety Seat 8-4
City Water Hookup 6-5
Exterior 6-2
Interior 5-3
Converter 5-14
Drain Systems 3-10
Drain Valve Locations 9-10
Hitch 8-5
Hitch Cover 6-12
Hydraulic Leveling System 6-5
Inverter/Charger 5-14
Jack 7-7
Loading 8-2
LPG System 9-7
Detector 2-7
Regulator 9-8
Remote Fill 9-7
2018 Interstate
Macerator Pump 9-11
Maintenance Schedules 9-2
Microwave Ovens 5-20
Molds 2-2, 3-9
Monitor Panel 5-14
Toilet 5-5
Winterizing 9-16
A Trailer 8-6
Your Touring Coach 8-9
Tires 7-3
Care 9-5
Changing 7-5
Rotation 7-9
Overnight Stop 3-7
Plumbing 9-8
Power Center 5-9
Power Shades 5-7
Vent 5-19
Ventilation 2-2
Range 5-20
Receptacles 5-16
Refrigerator 5-20
Warranty 3-2
Waste Water System 3-9
Water Heater 5-22
Winterizing 9-15
Water Pump 9-9
Strainer Cleaning 9-9
Winterizing 9-15
Weight Distribution 8-3
Winterizing and Storage 9-13
Winter Traveling 3-10
Safety 2-1, 3-11, 8-4
Screen Doors 6-10
Seat Belts 8-4
Service 3-5
Shoreline Power Supply 6-4
Solar System 5-22
Spare Tire Carrier 7-6
Specification Chart 4-3
Step 6-4
REV# 03
2018 Interstate
428 West Pike Street
P.O. Box 629
Jackson Center, OH. 45334-0629
Phone: (937) 596-6111 Fax: (937) 596-6539