Wheels and tires. Mercedes-Benz CLS 550 BlueEFFICIENCY, 2013 CLS Coupe, 2013, CLS, CLS Series
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326
Operation
Useful information i This Operator's Manual describes all models and all standard and optional equipment of your vehicle available at the time of publication of the Operator's
Manual. Country-specific differences are possible. Please note that your vehicle may not be equipped with all features described. This also applies to safetyrelated systems and functions.
i Read the information on qualified specialist workshops: ( Y page 24).
Before purchasing and using non-approved accessories, visit a qualified specialist workshop and inquire about:
R suitability
R legal stipulations
R factory recommendations
Information on the dimensions and types of wheels and tires for your vehicle can be found under "Wheel/tire combinations"
( Y page 353).
Information on air pressure for the tires on your vehicle can be found:
R on the vehicle's Tire and Loading
Information placard on the B-pillar
( Y page 337)
R on the tire pressure label on the fuel filler flap ( Y page 155)
R under "Tire pressure" ( Y page 329)
R in the "Tire pressure" section
Important safety notes
G WARNING
If wheels and tires of the wrong size are used, the wheel brakes or suspension components may be damaged. There is a risk of accident.
Always replace wheels and tires with those that fulfill the specifications of the original part (designation, manufacturer, model).
G WARNING
A flat tire severely impairs the driving, steering and braking characteristics of the vehicle. There is a risk of accident.
Tires without run-flat characteristics:
R do not drive with a flat tire.
R immediately replace the flat tire with your emergency spare wheel or spare wheel, or consult a qualified specialist workshop.
Tires with run-flat characteristics:
R pay attention to the information and warning notices on MOExtended tires (tires with run-flat characteristics).
Accessories that are not approved for your vehicle by Mercedes-Benz or are not being used correctly can impair the operating safety.
Operation
Information on driving
If the vehicle is heavily laden, check the tire pressures and correct them if necessary.
While driving, pay attention to vibrations, noises and unusual handling characteristics, e.g. pulling to one side. This may indicate that the wheels or tires are damaged. If you suspect that a tire is defective, reduce your speed immediately. Stop the vehicle as soon as possible to check the wheels and tires for damage. Hidden tire damage could also be causing the unusual handling characteristics.
If you find no signs of damage, have the tires and wheels checked at a qualified specialist workshop.
When parking your vehicle, make sure that the tires do not get deformed by the curb or other obstacles. If it is necessary to drive over curbs, speed humps or similar elevations, try to do so slowly and at an obtuse angle.
Otherwise, the tires, particularly the sidewalls, may be damaged.
Operation
327
Regular checking of wheels and tires
G WARNING
Damaged tires can cause tire inflation pressure loss. As a result, you could lose control of your vehicle. There is a risk of accident.
Check the tires regularly for signs of damage and replace any damaged tires immediately.
Regularly check the wheels and tires of your vehicle for damage at least once a month, as well as after driving off-road or on rough roads. Damaged wheels can cause a loss of tire pressure. Pay particular attention to damage such as:
R cuts in the tires
R punctures
R tears in the tires
R bulges on tires
R deformation or severe corrosion on wheels
Regularly check the tire tread depth and the condition of the tread across the whole width of the tire ( Y page 327). If necessary, turn the front wheels to full lock in order to inspect the inner side of the tire surface.
All wheels must have a valve cap to protect the valve against dirt and moisture. Do not mount anything onto the valve other than the standard valve cap or other valve caps approved by Mercedes-Benz for your vehicle.
Do not use any other valve caps or systems, e.g. tire pressure monitoring systems.
Regularly check the pressure of all the tires particularly prior to long trips. Adjust the tire pressure as necessary ( Y page 329).
Observe the notes on the emergency spare wheel ( Y page 357).
The service life of tires depends on the following factors amongst other things:
R
Driving style
R Tire pressure
R
Distance covered
Tire tread
G WARNING
Insufficient tire tread will reduce tire traction.
The tire is no longer able to dissipate water.
This means that on wet road surfaces, the risk of hydroplaning increases, in particular where speed is not adapted to suit the driving conditions. There is a risk of accident.
If the tire pressure is too high or too low, tires may exhibit different levels of wear at different locations on the tire tread. Thus, you should regularly check the tread depth and the condition of the tread across the entire width of all tires.
Minimum tire tread depth for:
R Summer tires: â in (3 mm)
R M+S tires: ã in (4 mm)
For safety reasons, replace the tires before the legally prescribed limit for the minimum tire tread depth is reached.
Bar indicator : for tread wear is integrated into the tire tread.
Tread wear indicators (TWI) are required by law. Six indicators are positioned on the tire tread. They are visible once the tread depth is approximately á in (1.6 mm). If this is the case, the tire is so worn that it must be replaced.
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328
Winter operation
Selecting, mounting and replacing tires
R Only mount tires and wheels of the same type and make.
R Only mount tires of the correct size onto the wheels.
R Break in new tires at moderate speeds for the first 60 miles (100 km). They only reach their full performance after this distance.
R
Do not drive with tires which have too little tread depth, as this significantly reduces the traction on wet roads (hydroplaning).
R Replace the tires after six years at the latest, regardless of wear.
Observe the notes on the emergency spare wheel ( Y page 357).
MOExtended tires (tires with run-flat properties)
With MOExtended tires (tires with run flat characteristics), you can continue to drive your vehicle even if there is a total loss of pressure in one or more tires.
MOExtended tires may only be used in conjunction with an active tire pressure loss warning system or with an active tire pressure monitor and on wheels specifically tested by
Mercedes-Benz.
Notes on driving with MOExtended tires with a flat tire ( Y page 313).
i Vehicles equipped with MOExtended tires are not equipped with a TIREFIT kit at the factory. It is therefore recommended that you additionally equip your vehicle with a
TIREFIT kit if you mount tires that do not feature run-flat properties, e.g. winter tires.
A TIREFIT kit can be obtained from a qualified specialist workshop.
Winter operation
General notes
Have your vehicle winterproofed at a qualified specialist workshop at the onset of winter.
Observe the notes in the "Changing a wheel" section ( Y page 348).
Driving with summer tires
At temperatures below 45 ‡ (+7 †), summer tires lose elasticity significantly, and therefore traction and braking power as well.
Change the tires on your vehicle to
M+S tires. Using summer tires at very cold temperatures could cause cracks to form, thereby damaging the tires permanently.
Mercedes-Benz cannot accept responsibility for this type of damage.
M+S tires
G WARNING
M+S tires with a tire tread depth of less than
ã in (4 mm) are not suitable for use in winter and do not provide sufficient traction. There is a risk of an accident.
M+S tires with a tread depth of less than ã in (4 mm) must be replaced immediately.
At temperatures below 45 ‡ (+7 †), use winter tires or all-weather tires. Both types of tire are identified by the M+S marking.
Only winter tires bearing the i snowflake symbol in addition to the M+S marking provide the best possible grip in wintry road conditions.
Only these tires will allow driving safety systems such as ABS and ESP ® to function optimally in winter. These tires have been developed specifically for driving in snow.
Use M+S tires of the same make and tread on all wheels to maintain safe handling characteristics.
Tire pressure
329
Always observe the maximum permissible speed specified for the M+S tires you have mounted.
Once the winter tires are mounted:
X
X
X
Check the tire pressures ( Y page 333).
Vehicles for Canada: restart the tire pressure loss warning system
( Y page 333).
Restart the tire pressure monitor
( Y page 334).
For more information on driving with the emergency spare wheel, see ( Y page 357).
Snow chains
G WARNING
If snow chains are installed to the front wheels, they may drag against the vehicle body or chassis components. This could cause damage to the vehicle or the tires.
There is a risk of an accident.
To avoid hazardous situations:
R never install snow chains to the front wheels
R always install snow chains in pairs to the rear wheels.
! On vehicles with AIRMATIC, you must drive at raised vehicle level if snow chains have been mounted. The vehicle may otherwise be damaged.
! On some tire sizes there is not enough space for snow chains. To avoid damage to the vehicle or tires, observe the "Wheel and tire combinations" section under "Tires and wheels".
For safety reasons, Mercedes-Benz recommends that you only use snow chains that have been specially approved for your vehicle by Mercedes-Benz, or are of a corresponding standard of quality.
If you intend to mount snow chains, please bear the following points in mind:
R
Snow chains may not be mounted on all wheel/tire combinations. Permissible wheel-tire combinations ( Y page 353).
R Only use snow chains when driving on roads completely covered by snow.
Remove the snow chains as soon as possible when you come to a road that is not snow-covered.
R
Local regulations may restrict the use of snow chains. Observe the appropriate regulations if you wish to mount snow chains.
R
Do not exceed the maximum permissible speed of 30 mph (50 km/h).
i You may wish to deactivate ESP ® when pulling away with snow chains installed
( Y page 67). This way you can allow the wheels to spin in a controlled manner, achieving an increased driving force
(cutting action).
For more information on driving with the emergency spare wheel, see ( Y page 357).
Tire pressure
Tire pressure specifications
Important safety notes
G WARNING
Tires with tire pressures that are too low or too high are associated with the following hazards:
R they can burst, in particular if the vehicle is heavily laden or when driven at high speeds.
R the tires can wear excessively and/or unevenly, which can severely impair tire traction.
R the driving, steering and braking characteristics may be severely impaired.
There is a risk of accident.
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330
Tire pressure
Follow recommended tire inflation pressures and check the pressure of all the tires including the spare wheel:
R monthly, at least
R if the load changes
R before beginning a long journey
R under different operating conditions, e.g.
off-road driving
If necessary, correct the tire pressure.
i The specifications on the sample Tire and
Loading Information placard and tire pressure tables are examples. Tire pressure specifications are vehicle-specific and may deviate from the data shown here.
The tire pressure specifications that are valid for your vehicle can be found on the
Tire and Loading Information placard and tire pressure table on the vehicle.
The Tire and Loading Information placard contains the recommended tire pressures for cold tires. The recommended tire pressures are valid for the maximum permissible load and up to the maximum permissible vehicle speed.
Tire pressure table
The tire pressure table is on the inside of the fuel filler flap.
General notes
The recommended tire pressures for the tires mounted at the factory can be found on the labels described here.
Operation with the emergency spare
wheel ( Y page 357).
Further information on tire pressures can be obtained at a qualified specialist workshop.
Tire and Loading Information placard
Example: tire pressure table for all tires permitted for this vehicle by the factory
The tire pressure table contains the recommended pressures for cold tires for various operating conditions, i.e. differing load and speed conditions.
:
Recommended tire pressures
The Tire and Loading Information placard is on the B-pillar on the driver's side
( Y page 337).
Example: tire pressure table with tire dimensions
If a tire size precedes a tire pressure, the tire pressure information following is only valid for that tire size. The load conditions "partially laden" and "fully laden" are defined in the table for different numbers of occupants and amounts of luggage. The actual number of seats may differ.
Tire pressure
331
Some tire pressure tables show only the rim diameters instead of the full tire size, e.g.
R18. The rim diameter is part of the tire size and can be found on the tire sidewall
( Y page 342).
If the tire pressures have been set to the lower values for lighter loads and/or lower road speeds, the pressures should be reset to the higher values:
R if you want to drive with an increased load and/or
R if you want to drive at higher road speeds.
i The tire pressures for increased loads and/or higher road speeds, shown in the tire pressure table, may have a negative effect on driving comfort.
If the tire pressure is not set correctly, this can lead to an excessive build up of heat and a sudden loss of pressure.
For more information, contact a qualified specialist workshop.
Important notes on tire pressure
G WARNING
If the tire pressure drops repeatedly, the wheel, valve or tire may be damaged. Tire pressure that is too low may result in a tire blow-out. There is a risk of an accident.
R Check the tire for foreign objects.
R
Check whether the wheel is losing air or the valve is leaking.
If you are unable to rectify the damage, contact a qualified specialist workshop.
G WARNING
If you fit unsuitable accessories onto tire valves, the tire valves may be overloaded and malfunction, which can cause tire pressure loss. Due to their design, retrofitted tire pressure monitors keep the tire valve open.
This can also result in tire pressure loss. There is a risk of an accident.
Only screw the standard valve cap or other valve caps approved by Mercedes-Benz for your vehicle onto the tire valve.
Use a suitable pressure gauge to check the tire pressure. The outer appearance of a tire does not permit any reliable conclusion about the tire pressure. On vehicles equipped with the electronic tire pressure monitoring system, the tire pressure can be checked using the on-board computer.
The tire temperature and pressure increase when the vehicle is in motion. This is dependent on the driving speed and the load.
Therefore, you should only correct tire pressures when the tires are cold.
The tires are cold:
R if the vehicle has been parked without direct sunlight on the tires for at least three hours and
R if the vehicle has been driven for less than
1 mile (1.6 km).
The tire temperature changes depending on the outside temperature, the vehicle speed and the tire load. If the tire temperature changes by 18 ‡ (10 †), the tire pressure changes by approximately 10 kPa (0.1 bar/
1.5 psi). Take this into account when checking the pressure of warm tires. Only correct the tire pressure if it is too low for the current operating conditions. If you check the tire pressure when the tires are warm, the resulting value will be higher than if the tires were cold. This is normal. Do not reduce the tire pressure to the value specified for cold
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332
Tire pressure tires. The tire pressure would otherwise be too low.
Observe the recommended tire pressures for cold tires:
R on the Tire and Loading Information placard on the B-pillar on the driver's side
R in the tire pressure table on the inside of the fuel filler flap
R on the yellow label on the emergency spare wheel (depending on the vehicle equipment)
Overinflated tires may:
R increase the braking distance
R have an adverse effect on handling characteristics
R wear quickly and unevenly
R have an adverse effect on ride comfort
R be more susceptible to damage
Maximum tire pressures
Underinflated or overinflated tires
Underinflation
G WARNING
Tires with pressure that is too low can overheat and burst as a consequence. In addition, they also suffer from excessive and/ or irregular wear, which can severely impair the braking properties and the driving characteristics. There is a risk of an accident.
Avoid tire pressures that are too low in all the tires, including the spare wheel.
Underinflated tires may:
R overheat, leading to tire defects
R have an adverse effect on handling characteristics
R wear quickly and unevenly
R have an adverse effect on fuel consumption
Overinflation
G WARNING
Tires with excessively high pressure can burst because they are damaged more easily by road debris, potholes etc. In addition, they also suffer from irregular wear, which can severely impair the braking properties and the driving characteristics. There is a risk of an accident.
Avoid tire pressures that are too high in all the tires, including the spare wheel.
:
Example: maximum permissible tire pressure
Never exceed the maximum permissible tire inflation pressure. Always observe the recommended tire pressure for your vehicle when adjusting the tire pressure
( Y page 329).
i The actual values for tires are vehiclespecific and may deviate from the values in the illustration.
Checking the tire pressures
Important safety notes
Observe the notes on tire pressure
( Y page 329).
Information on air pressure for the tires on your vehicle can be found:
R on the vehicle's Tire and Loading
Information placard on the B-pillar
( Y page 337)
R on the tire pressure label on the fuel filler flap ( Y page 155)
Tire pressure
333
R in the "Tire pressure" section
R under "Tire pressure" ( Y page 329)
Checking tire pressures manually
To determine and set the correct tire pressure, proceed as follows:
X
X
X
X
Remove the valve cap of the tire that is to be checked.
Press the tire pressure gauge securely onto the valve.
Read the tire pressure and compare it with the recommended value on the Tire and
Loading Information placard ( Y page 329).
If the tire pressure is too low, increase it to the recommended value.
X
X
X If the tire pressure is too high, release air by pressing down the metal pin in the valve.
Use the tip of a pen, for example. Then, check the tire pressure again using the tire pressure gauge.
Screw the valve cap onto the valve.
Repeat these steps for the other tires.
cannot be detected by the tire pressure loss warning system.
The tire pressure monitor is not able to warn you of a sudden loss of pressure, e.g. if the tire is penetrated by a foreign object. In the event of a sudden loss of pressure, bring the vehicle to a halt by braking carefully. Avoid abrupt steering maneuvers.
The function of the tire pressure loss warning system is limited or delayed if:
R snow chains are mounted to your vehicle's tires.
R road conditions are wintry.
R you are driving on sand or gravel.
R you adopt a very sporty driving style
(cornering at high speeds or driving with high rates of acceleration).
R you are driving with a heavy load (in the vehicle or on the roof).
Tire pressure loss warning system
(Canada only)
Important safety notes
While the vehicle is in motion, the tire pressure loss warning system monitors the set tire pressure using the rotational speed of the wheels. This enables the system to detect significant pressure loss in a tire. If the speed of rotation of a wheel changes as a result of a loss of pressure, a corresponding warning message will appear in the multifunction display.
The tire pressure warning system does not warn you of an incorrectly set tire pressure.
Observe the notes on the recommended tire pressure ( Y page 329).
The tire pressure loss warning system does not replace the need to regularly check your vehicle's tire pressures, since an even loss of pressure on several tires at the same time
Restarting the tire pressure loss warning system
Restart the tire pressure loss warning system if you have:
R changed the tire pressure
R changed the wheels or tires
R mounted new wheels or tires
X Before restarting, make sure that the tire pressures are set properly on all four tires for the respective operating conditions.
X
X
The recommended tire pressures can be found on the Tire and Loading Information placard on the B-pillar on the driver's side or the tire pressure table on the fuel filler flap. The tire pressure loss warning system can only give reliable warnings if you have set the correct tire pressure. If an incorrect tire pressure is set, these incorrect values will be monitored.
Also observe the notes in the section on tire pressures ( Y page 329).
Make sure that the SmartKey is in position 2 ( Y page 139) in the ignition lock.
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334
Tire pressure
X Press = or ; on the steering wheel to select the Serv.
menu.
X
X
Press the 9 or : button to select
Tire Pressure .
Press the a button.
The Run Flat Indicator Active
Press OK to Restart message appears in the multifunction display.
If you wish to confirm the restart:
X
X
X
Press the a button.
The Tire Pressure Now OK?
message appears in the multifunction display.
Press the 9 or : button to select
Yes .
Press the a button.
The Run Flat Indicator Restarted message appears in the multifunction display.
After a teach-in period, the tire pressure loss warning system will monitor the set tire pressures of all four tires.
If you wish to cancel the restart:
X Press the % button.
or
X When the Tire Pressure Now OK?
message appears, press the 9 or : button to select Cancel .
X Press the a button.
The tire pressure values stored at the last restart will continue to be monitored.
Tire pressure monitor
Important safety notes
G WARNING
Each tire, including the spare (if provided), should be checked at least once a month when cold and inflated to the pressure recommended by the vehicle manufacturer on the Tire and Loading Information placard on the driver's door B-pillar or the tire pressure label on the inside of the fuel filler flap. If your vehicle has tires of a different size than the size indicated on the Tire and Loading
Information placard or the tire pressure label, you should determine the proper tire pressure for those tires.
As an added safety feature, your vehicle has been equipped with a tire pressure monitoring system (TPMS) that illuminates a low tire pressure telltale when one or more of your tires are significantly underinflated.
Accordingly, when the low tire pressure telltale illuminates, you should stop and check your tires as soon as possible, and inflate them to the proper pressure. Driving on a significantly underinflated tire causes the tire to overheat and can lead to tire failure.
Underinflation also reduces fuel efficiency and tire tread life, and may affect the vehicle's handling and stopping ability.
Please note that the TPMS is not a substitute for proper tire maintenance, and it is the driver's responsibility to maintain correct tire pressure, even if underinflation has not reached the level to trigger illumination of the
TPMS low tire pressure telltale.
USA only:
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate if the system is not operating properly. The TPMS malfunction indicator is combined with the low tire pressure telltale. When the system detects a malfunction, the warning lamp will flash for approximately a minute and then remain continuously illuminated. This sequence will be repeated every time the vehicle is started as long as the malfunction exists.
When the malfunction indicator is illuminated, the system may not be able to detect or signal low tire pressure as intended. TPMS malfunctions may occur for a variety of reasons, including the installation of incompatible replacement or alternate tires or wheels on the vehicle that prevent the
TPMS from functioning properly. Always check the TPMS malfunction telltale after
Tire pressure
335 replacing one or more tires or wheels on your vehicle to ensure that the replacement or alternate tires and wheels allow the TPMS to continue to function properly.
It is the driver's responsibility to set the tire pressure to that recommended for cold tires which is suitable for the operating situation
( Y page 329). Note that the correct tire pressure for the current operating situation must first be taught-in to the tire pressure monitor. If there is a substantial loss of pressure, the warning threshold for the warning message is aligned to the reference values taught-in. Restart the tire pressure monitor after adjusting the pressure of the cold tires ( Y page 336). The current pressures are saved as new reference values.
As a result, a warning message will appear if the tire pressure drops significantly.
The tire pressure monitor does not warn you of an incorrectly set tire pressure. Observe the notes on the recommended tire pressure
( Y page 329).
The tire pressure monitor is not able to warn you of a sudden loss of pressure, e.g. if the tire is penetrated by a foreign object. In the event of a sudden loss of pressure, bring the vehicle to a halt by braking carefully. Avoid abrupt steering maneuvers.
If a tire pressure monitor system is installed, the vehicle's wheels have sensors installed that monitor the tire pressures in all four tires.
The tire pressure monitor warns you if the pressure drops in one or more of the tires. The tire pressure monitor only functions if the correct sensors are installed on all wheels.
The tire pressure monitor has a yellow warning lamp in the instrument cluster for indicating pressure loss/malfunctions (USA) or pressure loss (Canada). Whether the warning lamp flashes or lights up indicates whether a tire pressure is too low or the tire pressure monitor is malfunctioning:
R if the warning lamp is lit continuously, the tire pressure on one or more tires is significantly too low. The tire pressure monitor is not malfunctioning.
R
USA only: if the warning lamp flashes for around a minute and then remains lit constantly, the tire pressure monitor is malfunctioning.
Information on tire pressures is displayed in the multifunction display. After a few minutes of driving, the current tire pressure of each tire is shown in the multifunction display.
USA only: if there is a malfunction with the tire pressure monitor it can take more than ten minutes until the malfunction is shown by the tire pressure warning lamp flashing for approximately one minute and then lighting up continuously. When the malfunction has been rectified, the tire pressure warning lamp goes out after a few minutes of driving.
The tire pressure values indicated by the onboard computer may differ from those measured at a gas station with a pressure gauge. The tire pressures shown by the onboard computer refer to those measured at sea level. At high altitudes, the tire pressure values indicated by a pressure gauge are higher than those shown by the on-board computer. In this case, do not reduce the tire pressures.
The operation of the tire pressure monitor can be affected by interference from radio transmitting equipment (e.g. radio headphones, two-way radios) that may be being operated in or near the vehicle.
i USA only:
This device complies with part 15 of the
FCC Rules. Operation is subject to the following two conditions:
1. This device may not cause interference, and
2. this device must accept any interference received, including interference that may cause undesired operation of the device.
Any unauthorized modification to this device could void the user's authority to operate the equipment.
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336
Tire pressure i Canada only:
This device complies with RSS-210 of
Industry Canada. Operation is subject to the following two conditions:
1. This device may not cause interference, and
2. this device must accept any interference received, including interference that may cause undesired operation.
Any unauthorized modification to this device could void the user's authority to operate the equipment.
Checking tire pressure electronically
X
X
Make sure that the SmartKey is in position 2 ( Y page 139) in the ignition lock.
Press the = or ; button on the steering wheel to select the Serv.
menu.
X
X
Press the 9 or : button to select
Tire Pressure .
Press button a.
The current tire pressure for each wheel will be displayed in the multifunction display.
If the vehicle was parked for longer than
20 minutes the Tire pressures will be displayed after driving a few minutes message is shown.
After a teach-in period, the tire pressure monitor automatically recognizes new wheels or new sensors. If a clear allocation of the tire pressure values to the individual wheels is not possible, the Tire Pressure Monitor
Active message is shown instead of the tire pressure display. The tire pressures are already being monitored.
i If an emergency spare wheel is mounted, the system may continue to show the tire pressure of the wheel that has been removed for a few minutes. If this occurs, note that the value displayed for the position where the spare wheel is mounted is not the same as the current tire pressure of the emergency spare wheel.
Tire pressure monitor warning messages
If the tire pressure monitor detects a significant pressure loss on one or more tires, a warning message is shown in the multifunction display. A warning tone also sounds and the tire pressure warning lamp lights up in the instrument cluster.
Each tire that is affected by a significant loss of pressure is highlighted in the pressure display.
X If the Correct Tire Pressure message appears in the multifunction display, check the tire pressure on all four wheels and correct it if necessary.
i If the wheel positions on the vehicle are interchanged, the tire pressures may be displayed for the wrong positions for a short time. This is rectified after a few minutes of driving, and the tire pressures are displayed for the correct positions.
Restarting the tire pressure monitor
When you restart the tire pressure monitor, all existing warning messages are deleted and the warning lamps go out. The monitor uses the currently set tire pressures as the reference values for monitoring. In most cases, the tire pressure monitor will automatically detect the new reference values after you have changed the tire pressure. However, you can also define reference values manually as described here.
The tire pressure monitor then monitors the new tire pressure values.
X Set the tire pressure to the value recommended for the corresponding driving situation on the Tire and Loading
Information placard on the driver's side
B-pillar ( Y page 329).
Additional tire pressure values for different loads can also be found on the tire pressure
Loading the vehicle
337
X
X
X
X
X
X table on the inside of the fuel filler flap
( Y page 329).
Make sure that the tire pressure is correct on all four wheels.
Make sure that the SmartKey is in position
2 in the ignition lock.
Press the = or ; button on the steering wheel to select the Serv.
menu.
Press the 9 or : button to select
Tire Pressure .
Press the a button.
The multifunction display shows the current tire pressure for each tire or the
Tire pressures will be displayed after driving a few minutes message.
Press the : button.
The multifunction display shows the Use
Current Pressure Values as New
Reference Values message.
If you wish to confirm the restart:
X Press the a button.
The Tire Pressure Monitor
Restarted message appears in the multifunction display.
After driving for a few minutes, the system checks whether the current tire pressures are within the specified range. The new tire pressures are then accepted as reference values and monitored.
If you wish to cancel the restart:
X Press the % button.
The tire pressure values stored at the last restart will continue to be monitored.
steering and driving characteristics and lead to brake failure. There is a risk of accident.
Observe the load rating of the tires. The load rating must be at least half of the GAWR of your vehicle. Never overload the tires by exceeding the maximum load.
Two instruction labels on your vehicle show the maximum possible load.
(1) The Tire and Loading Information placard is on the B-pillar on the driver's side. The
Tire and Loading Information placard shows the maximum permissible number of occupants and the maximum permissible vehicle load. It also contains details of the tire sizes and corresponding pressures for tires installed at the factory.
(2) The vehicle identification plate is on the
B-pillar on the driver's side. The vehicle identification plate informs you of the gross vehicle weight rating. It is made up of the vehicle weight, all vehicle occupants, the fuel and the cargo. You can also find information about the maximum gross axle weight rating on the front and rear axle.
The maximum gross axle weight rating is the maximum weight that can be carried by one axle (front or rear axle). Never exceed the maximum load or the maximum gross axle weight rating for the front or rear axle.
Loading the vehicle
Instruction labels for tires and loads
G WARNING
Overloaded tires can overheat, causing a blowout. Overloaded tires can also impair the
: B-pillar, driver's side
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338
Loading the vehicle
Maximum permissible gross vehicle weight rating
travel in the vehicle. This information can be found on the Tire and Loading Information placard.
i The specifications shown on the Tire and
Loading Information placard in the illustration are examples. The number of seats is vehicle-specific and can differ from the details shown. The number of seats in your vehicle can be found on the Tire and
Loading Information placard.
X Specification for maximum gross vehicle weight : is listed in the Tire and Loading
Information placard: "The combined weight of occupants and cargo should never exceed XXX kilograms or XXX lbs."
The gross weight of all vehicle occupants, load and luggage must not exceed the specified value.
i The specifications shown on the Tire and
Loading Information placard in the illustration are examples. The maximum permissible gross vehicle weight rating is vehicle-specific and may differ from that in the illustration. You can find the valid maximum permissible gross vehicle weight rating for your vehicle on the Tire and
Loading Information placard.
Number of seats
Determining the correct load limit
Step-by-step instructions
The following steps have been developed as required of all manufacturers under Title 49,
Code of U.S. Federal Regulations, Part 575 pursuant to the "National Traffic and Motor
Vehicle Safety Act of 1966".
X
X
Step 1: Locate the statement "The combined weight of occupants and cargo should never exceed XXX kg or XXX lbs." on your vehicle’s Tire and Loading Information placard.
Step 2: Determine the combined weight of the driver and passengers that will be riding in your vehicle.
X Step 3: Subtract the combined weight of the driver and passengers from XXX kilograms or XXX lbs.
X
X
Step 4: The resulting figure equals the available amount of cargo and luggage load capacity. For example: at a sum “XXX” of
1400 lbs and five occupants each weighing
150 lbs, the amount of available cargo and luggage load capacity is 650 lbs (1400 -
750 (5 x 150) = 650 lbs).
Step 5: Determine the combined weight of luggage and cargo being loaded on the vehicle. That weight may not safely exceed the available cargo and luggage load capacity calculated in step 4.
Maximum number of seats : indicates the maximum number of occupants allowed to
Loading the vehicle
339
Example: steps 1 to 3
The following table shows examples on how to calculate total and cargo load capacities with varying seating configurations and number and size of occupants. The following examples use a load limit of 1500 lbs
(680 kg). This is for illustration purposes
only. Make sure you are using the actual load limit for your vehicle stated on your vehicle's
Tire and Loading Information placard
( Y page 337).
The higher the weight of all the occupants, the smaller the maximum load for luggage.
Step 1
Exampl e 3
1500 lbs
(680 kg)
Combin ed maximu m weight of occupa nts and cargo
(data from the Tire and
Loading
Informa tion placard)
Exampl e 1
1500 lbs
(680 kg)
Exampl e 2
1500 lbs
(680 kg)
Step 2
Gross weight of all occupa nts
Exampl e 1
5 Number
of people in the vehicle
(driver and occupa nts)
Distribu tion of the occupa nts
Weight of the occupa nts
Front: 2
Rear: 3
Exampl e 2
3
Front: 1
Rear: 2
Exampl e 3
1
Front: 1
Occupan t 1:
150 lbs
(68 kg)
Occupan t 2:
180 lbs
(82 kg)
Occupan t 3:
160 lbs
(73 kg)
Occupan t 4:
140 lbs
(63 kg)
Occupan t 5:
120 lbs
(54 kg)
750 lbs
(340 kg)
Occupan t 1:
200 lbs
(91 kg)
Occupan t 2:
190 lbs
(86 kg)
Occupan t 3:
150 lbs
(68 kg)
540 lbs
(245 kg)
Occupan t 1:
150 lbs
(68 kg)
150 lbs
(68 kg)
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All about wheels and tires
Step 3
Permiss ible load
(maxim um gross vehicle weight rating from the Tire and
Loading
Informa tion placard minus the gross weight of all occupa nts)
Exampl e 1
1500 lbs
(680 kg)
Ò750 lbs
(340 kg)
=
750 lbs
(340 kg)
Exampl e 2
1500 lbs
(680 kg)
Ò540 lbs
(245 kg)
=
960 lbs
(435 kg)
Exampl e 3
1500 lbs
(680 kg)
Ò150 lbs
(68 kg) =
1350 lbs
(612 kg)
To ensure that your vehicle does not exceed the maximum permissible values (gross vehicle weight and maximum gross axle weight rating), have your loaded vehicle
(including driver, occupants, cargo, and full trailer load if applicable) weighed on a suitable vehicle weighbridge.
All about wheels and tires
Uniform Tire Quality Grading
Standards
Overview of Tire Quality Grading
Standards
Vehicle identification plate
Even if you have calculated the total load carefully, you should still make sure that the gross vehicle weight rating and the gross axle weight rating are not exceeded. Details can be found on the vehicle identification plate on the B-pillar on the driver's side of the vehicle
( Y page 337).
Permissible gross vehicle weight: the gross weight of the vehicle, all passengers, load and trailer load/noseweight (if applicable) must not exceed the permissible gross vehicle weight.
Gross axle weight rating: the maximum permissible weight that can be carried by one axle (front or rear axle).
Uniform Tire Quality Grading Standards are
U.S. government specifications. Their purpose is to provide drivers with uniform reliable information on tire performance data.
Tire manufacturers have to grade tires using three performance factors: : tread wear grade, ; traction grade and = temperature grade. These regulations do not apply to
Canada. Nevertheless, all tires sold in North
America are provided with the corresponding quality grading markings on the sidewall of the tire.
Where applicable, the tire grading information can be found on the tire sidewall between the tread shoulder and maximum tire width.
Example:
R
Treadwear grade: 200
R
Traction grade: AA
R
Temperature grade: A
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341
All passenger car tires must conform to the statutory safety requirements in addition to these grades.
i The actual values for tires are vehiclespecific and may deviate from the values in the illustration.
Treadwear
The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified
U.S. government course. For example, a tire graded 150 would wear one and one-half times as well on the government course as a tire graded 100.
The relative performance of tires depends upon the actual conditions of their use, however, and may depart significantly from the norm, due to variations in driving habits, service practices and differences in road characteristics and climate conditions.
Traction
G WARNING
The traction grade assigned to this tire is based on straight-ahead braking traction tests, and does not include acceleration, cornering, hydroplaning, or peak traction characteristics.
! Avoid wheelspin. This can lead to damage to the drive train.
The traction grades, from highest to lowest, are AA, A, B, and C. Those grades represent the tire's ability to stop on a wet surface as measured under controlled conditions on specified government test surfaces of asphalt and concrete. A tire marked C may have poor traction performance.
The safe speed on a wet, snow covered or icy road is always lower than on dry road surfaces.
You should pay special attention to road conditions when temperatures are around freezing point.
Mercedes-Benz recommends a minimum tread depth of ã in (4 mm) on all four winter tires. Observe the legally required minimum tire tread depth ( Y page 327). Winter tires can reduce the braking distance on snow-covered surfaces in comparison with summer tires.
The braking distance is still much further than on surfaces that are not icy or covered with snow. Take appropriate care when driving.
Further information on winter tires (M+S tires) ( Y page 328).
Temperature
G WARNING
The temperature grade for this tire is established for a tire that is properly inflated and not overloaded. Excessive speed, underinflation, or excessive loading, either separately or in combination, can cause excessive heat build-up and possible tire failure.
The temperature grades are A (the highest),
B, and C. These represent the tire's resistance to the generation of heat and its ability to dissipate heat when tested under controlled conditions on a specified indoor laboratory test wheel. Sustained high temperature can cause the material of the tire to degenerate and reduce tire life, and excessive temperature can lead to sudden tire failure. The grade C corresponds to a level of performance which all passenger car tires must meet under the Federal Motor Vehicle
Safety Standard No. 109. Grades B and A represent higher levels of performance on the laboratory test wheel than the minimum required by law.
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342
All about wheels and tires
Tire labeling
Overview
Therefore, only use tire types and sizes approved for your vehicle model. Observe the tire load rating and speed rating required for your vehicle.
:
;
=
?
A
B
C
D
E
Uniform Tire Quality Grading Standard
( Y page 346)
DOT, Tire Identification Number
( Y page 345)
Maximum tire load ( Y page 344)
Maximum tire pressure ( Y page 332)
Manufacturer
Tire material ( Y page 345)
Tire size designation, load-bearing capacity and speed index ( Y page 342)
Load index ( Y page 344)
Tire name
The markings described above are on the tire in addition to the tire name (sales designation) and the manufacturer's name.
i Tire data is vehicle-specific and may deviate from the data in the example.
Tire size designation, load-bearing capacity and speed rating
G WARNING
Exceeding the stated tire load-bearing capacity and the approved maximum speed could lead to tire damage or the tire bursting.
There is a risk of accident.
:
;
=
?
A
B
Tire width
Nominal aspect ratio in %
Tire code
Rim diameter
Load bearing index
Speed rating
General: depending on the manufacturer's standards, the size imprinted in the tire wall may not contain any letters or may contain one letter that precedes the size description.
If there is no letter preceding the size description (as shown above): these are passenger vehicle tires according to
European manufacturing standards.
If "P" precedes the size description: these are passenger vehicle tires according to U.S.
manufacturing standards.
If "LT" precedes the size description: these are light truck tires according to U.S.
manufacturing standards.
If "T" precedes the size description: these are compact emergency spare wheels at high tire pressure, to be used only temporarily in an emergency.
Tire width: tire width : shows the nominal tire width in millimeters.
Height-width ratio: aspect ratio ; is the size ratio between the tire height and tire width and is shown in percent. The aspect
All about wheels and tires
343 ratio is calculated by dividing the tire width by the tire height.
Tire code: tire code = specifies the tire type.
"R" represents radial tires; "D" represents diagonal tires; "B" represents diagonal radial tires.
Optionally, tires with a maximum speed of over 149 mph (240 km/h) may have a “ZR” in the size description, depending on the manufacturer (e.g. 245/40 ZR 18).
Rim diameter: rim diameter ? is the diameter of the bead seat, not the diameter of the rim flange. The rim diameter is specified in inches (in).
Load-bearing index: load-bearing index A is a numerical code that specifies the maximum load-bearing capacity of a tire.
Do not overload the tires by exceeding the specified load limit. The maximum permissible load can be found on the vehicle's Tire and Loading Information placard on the B-pillar on the driver's side
( Y page 337).
Example:
The load bearing index 91 is equivalent to a maximum load of 1356 lb (615 kg) that the tire can carry. For further information on the maximum tire load in kilograms and lbs, see
( Y page 344).
For further information on the load bearing index, see "Load index" ( Y page 344).
Speed rating: speed rating B specifies the approved maximum speed of the tire.
i Tire data is vehicle-specific and may deviate from the data in the example.
Regardless of the speed rating, always observe the speed limits. Drive carefully and adapt your driving style to the traffic conditions.
Summer tires
Index
Q
R
Speed rating up to 100 mph (160 km/h) up to 106 mph (170 km/h)
T
H
Index
S
V
W
Y
ZR...Y
Speed rating up to 112 mph (180 km/h) up to 118mph (190 km/h) up to 130mph (210 km/h) up to 149 mph (240 km/h) up to 168 mph (270 km/h) up to 186mph (300 km/h) up to 186mph (300 km/h)
ZR...(..Y) over 186 mph (300 km/h)
ZR over 149 mph (240 km/h)
R
Optionally, tires with a maximum speed of over 149 mph (240 km/h) may have a “ZR” in the size description, depending on the manufacturer (e.g. 245/40 ZR18).
The service specification is made up of load-bearing index A and speed rating
B.
R
If the size description of your tire includes
"ZR" and there are no service specifications, ask the tire manufacturer in order to find out the maximum speed.
If a service specification is available, the maximum speed is limited according to the speed rating in the service specification.
Example: 245/40 ZR 18 97 Y. In this example, "97 Y" is the service specification.
The letter "Y" represents the speed rating and the maximum speed of the tire is limited to 186 mph (300km/h).
R
Every tire that has a maximum speed of more than 186 mph (300 km/h) must have a "ZR" in the size description and the service specification must be given in parentheses. Example:
275/40 ZR 18 (99 Y). The speed rating "(Y)" indicates that the maximum speed of the tire is over 186 mph (300 km/h). Ask the tire manufacturer about the maximum speed.
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All about wheels and tires
All-weather tires and winter tires
Index
Q M+S 3
Speed rating up to 100 mph (160 km/h)
T M+S 3 up to 118mph (190 km/h)
H M+S 3 up to 130mph (210 km/h)
V M+S 3 up to 149 mph (240 km/h)
Load index
i Not all tires with the M+S marking provide the driving characteristics of winter tires.
In addition to the M+S marking, winter tires also have the i snowflake symbol on the tire wall. Tires with this marking fulfill the requirements of the Rubber
Manufacturers Association (RMA) and the
Rubber Association of Canada (RAC) regarding the tire traction on snow. They have been especially developed for driving on snow.
An electronic speed limiter prevents your vehicle from exceeding the following speeds:
R all vehicles (except AMG vehicles):
130 mph (210 km/h)
R
AMG vehicles: 155 mph (250 km/h)
R
AMG vehicles with Performance Package:
186 mph (300 km/h)
R
The speed rating of tires mounted at the factory may be higher than the maximum speed that the electronic speed limiter permits.
Make sure that your tires have the required speed rating, e.g. when buying new tires. The required speed rating for your vehicle can be found in the "Tires" section ( Y page 353).
Further information about reading tire data can be obtained from any qualified specialist workshop.
In addition to the load bearing index, load index : may be imprinted after the letters that identify speed index B on the sidewall of the tire ( Y page 342).
R
If no specification is given: no text (as in the example above), represents a standard load (SL) tire
R
XL or Extra Load: represents a reinforced tire
R
Light Load: represents a light load tire
R
C, D, E: represents a load range that depends on the maximum load that the tire can carry at a certain pressure i Tire data is vehicle-specific and may deviate from the data in the example.
Maximum load rating
Maximum tire load : is the maximum permissible weight for which the tire is approved.
3 Or M+Si for winter tires.
All about wheels and tires
345
Do not overload the tires by exceeding the specified load limit. The maximum permissible load can be found on the vehicle's Tire and Loading Information placard on the B-pillar on the driver's side
( Y page 337).
i The actual values for tires are vehiclespecific and may deviate from the values in the illustration.
DOT, Tire Identification Number (TIN)
U.S. tire regulations prescribe that every tire manufacturer or retreader must imprint a TIN in or on the sidewall of every tire produced.
Tire size: identifier = describes the tire size.
Tire type code: tire type code ? can be used by the manufacturer as a code to describe specific characteristics of the tire.
Date of manufacture: date of manufacture
A provides information about the age of a tire. The first and second positions represent the week of manufacture, starting with "01" for the first calendar week. Positions three and four represent the year of manufacture.
For example, a tire that is marked with
"3208", was manufactured in week 32 in
2008.
i Tire data is vehicle-specific and may deviate from the data in the example.
Tire characteristics
The TIN is a unique identification number. The
TIN enables the tire manufacturers or retreaders to inform purchasers of recalls and other safety-relevant matters. It makes it possible for the purchaser to easily identify the affected tires.
The TIN is made up of manufacturer identification code ;, tire size =, tire type code ? and manufacturing date A.
DOT (Department of Transportation): tire symbol : indicates that the tire complies with the requirements of the U.S. Department of Transportation.
Manufacturer identification code: manufacturer identification code ; provides details on the tire manufacturer. New tires have a code with two symbols. Retreaded tires have a code with four symbols.
For further information about retreaded tires, see ( Y page 326).
This information describes the type of tire cord and the number of layers in sidewall : and under tire tread ;.
i Tire data is vehicle-specific and may deviate from the data in the example.
Definition of terms for tires and loading
Tire ply composition and material used
Describes the number of plies or the number of layers of rubber-coated fabric in the tire tread and sidewall. These are made of steel, nylon, polyester and other materials.
Bar
Metric unit for tire pressure.
14.5038 pounds per square inch (psi) and
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346
All about wheels and tires
100 kilopascals (kPa) are the equivalent of
1 bar.
DOT (Department of Transportation)
DOT marked tires fulfill the requirements of the United States Department of
Transportation.
Normal occupant weight
The number of occupants for which the vehicle is designed multiplied by
68 kilograms (150 lb).
Uniform Tire Quality Grading Standards
A uniform standard to grade the quality of tires with regards to tread quality, tire traction and temperature characteristics. Ratings are determined by tire manufacturers using U.S.
government testing procedures. The ratings are molded into the sidewall of the tire.
Recommended tire pressure
The recommended tire pressure applies to the tires mounted at the factory.
The Tire and Loading Information placard contains the recommended tire pressures for cold tires on a fully loaded vehicle and for the maximum permissible vehicle speed.
The tire pressure table contains the recommended pressures for cold tires for various operating conditions, i.e. differing load and speed conditions.
Increased vehicle weight due to optional equipment
This is the combined weight of all standard and optional equipment available for the vehicle, regardless of whether it is actually installed on the vehicle or not.
Rim
This is the part of the wheel on which the tire is mounted.
GAWR (Gross Axle Weight Rating)
The GAWR is the maximum gross axle weight rating. The actual load on an axle must never exceed the gross axle weight rating. The gross axle weight rating can be found on the vehicle identification plate on the B-pillar on the driver's side.
Speed rating
The speed rating is part of the tire identification. It specifies the speed range for which the tire is approved.
GVW (Gross Vehicle Weight)
The gross vehicle weight includes the weight of the vehicle including fuel, tools, the spare wheel, accessories installed, occupants, luggage and the drawbar noseweight, if applicable. The gross vehicle weight must not exceed the gross vehicle weight rating GVWR as specified on the vehicle identification plate on the B-pillar on the driver's side.
GVWR (Gross Vehicle Weight Rating)
The GVWR is the maximum permissible gross weight of a fully loaded vehicle (the weight of the vehicle including all accessories, occupants, fuel, luggage and the drawbar noseweight, if applicable). The gross vehicle weight rating is specified on the vehicle identification plate on the B-pillar on the driver's side.
Maximum loaded vehicle weight
The maximum weight is the sum of:
R the curb weight of the vehicle
R the weight of the accessories
R the load limit
R the weight of the factory installed optional equipment
Kilopascal (kPa)
Metric unit for tire pressure. 6.9 kPa corresponds to 1 psi. Another unit for tire pressure is bar. There are 100 kilopascals
(kPa) to 1 bar.
Load index
In addition to the load-bearing index, the load index may also be imprinted on the sidewall of the tire. This specifies the load-bearing capacity more precisely.
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347
Curb weight
The weight of a vehicle with standard equipment including the maximum capacity of fuel, oil and coolant. It also includes the airconditioning system and optional equipment if these are installed in the vehicle, but does not include passengers or luggage.
Maximum load rating
The maximum tire load is the maximum permissible weight in kilograms or lbs for which a tire is approved.
Maximum permissible tire pressure
Maximum permissible tire pressure for one tire.
Maximum load on one tire
Maximum load on one tire. This is calculated by dividing the maximum axle load of one axle by two.
PSI (pounds per square inch)
A standard unit of measure for tire pressure.
Aspect ratio
Relationship between tire height and tire width in percent.
Tire pressure
This is pressure inside the tire applying an outward force to each square inch of the tire's surface. The tire pressure is specified in pounds per square inch (psi), in kilopascal
(kPa) or in bar. The tire pressure should only be corrected when the tires are cold.
Cold tire pressure
The tires are cold:
R if the vehicle has been parked without direct sunlight on the tires for at least three hours and
R if the vehicle has been driven for less than
1 mile (1.6 km).
Tread
The part of the tire that comes into contact with the road.
Bead
The tire bead ensures that the tire sits securely on the wheel. There are several steel wires in the bead to prevent the tire from coming loose from the wheel rim.
Sidewall
The part of the tire between the tread and the bead.
Weight of optional extras
The combined weight of those optional extras that weigh more than the replaced standard parts and more than 2.3 kilograms (5 lbs).
These optional extras, such as highperformance brakes, level control, a roof rack or a high-performance battery, are not included in the curb weight and the weight of the accessories.
TIN (Tire Identification Number)
This is a unique identifier which can be used by a tire manufacturer to identify tires, for example for a product recall, and thus identify the purchasers. The TIN is made up of the manufacturer's identity code, tire size, tire type code and the manufacturing date.
Load bearing index
The load bearing index (also load index) is a code that contains the maximum load bearing capacity of a tire.
Traction
Traction is the result of friction between the tires and the road surface.
Treadwear indicators
Narrow bars (tread wear bars) that are distributed over the tire tread. If the tire tread is level with the bars, the wear limit of á in
(1.6 mm) has been reached.
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348
Changing a wheel
Occupant distribution
The distribution of occupants in a vehicle at their designated seating positions.
Total load limit
Rated cargo and luggage load plus
68 kilograms (150 lb) multiplied by the number of seats in the vehicle.
Changing a wheel
Flat tire
You can find information on what to do in the event of a flat tire in the "Breakdown assistance" section ( Y page 313).
Instructions for driving with MOExtended tires in the event of a flat tire are also provided there.
The "Breakdown assistance" section
( Y page 313) contains information and notes on how to deal with a flat tire. Instructions for driving with MOExtended tires in the event of a flat tire are also provided there.
Always observe the instructions and safety notes in the "Mounting a wheel" section
( Y page 349).
The wear patterns on the front and rear tires differ, depending on the operating conditions.
Rotate the wheels before a clear wear pattern has formed on the tires. Front tires typically wear more on the shoulders and the rear tires in the center.
If your vehicle's tire configuration allows, you can rotate the wheels according to the intervals in the tire manufacturer's warranty book in your vehicle documents. If this is not available, the tires should then be replaced every 3,000 to 6,000 miles (5,000 to
10,000 km), or earlier if the tire wear requires this. Do not change the direction of wheel rotation.
Clean the contact surfaces of the wheel and the brake disc thoroughly every time a wheel is interchanged. Check the tire pressure and, if necessary, restart the tire pressure loss warning system or the tire pressure monitor.
Interchanging the wheels
G WARNING
Interchanging the front and rear wheels may severely impair the driving characteristics if the wheels or tires have different dimensions.
The wheel brakes or suspension components may also be damaged. There is a risk of accident.
Rotate front and rear wheels only if the wheels and tires are of the same dimensions.
! On vehicles equipped with a tire pressure monitor, electronic components are located in the wheel.
Tire-mounting tools should not be used near the valve. This could damage the electronic components.
Only have tires changed at a qualified specialist workshop.
Direction of rotation
Tires with a specified direction of rotation have additional benefits, e.g. if there is a risk of hydroplaning. You will only gain these benefits if the correct direction of rotation is maintained.
An arrow on the sidewall of the tire indicates its correct direction of rotation.
Storing wheels
Store wheels that are not being used in a cool, dry and preferably dark place. Protect the tires from oil, grease, gasoline and diesel.
Cleaning the wheels
G WARNING
The water jet from a circular jet nozzle (dirt blasters) can cause invisible exterior damage
to the tires or chassis components.
Components damaged in this way may fail unexpectedly. There is a risk of an accident.
Do not use power washers with circular jet nozzles to clean the vehicle. Have damaged tires or chassis components replaced immediately.
Changing a wheel
349
Securing the vehicle to prevent it from rolling away
Mounting a wheel
Preparing the vehicle
X Park the vehicle on firm, non-slippery and level ground.
X
X
X
X
X
X
Apply the parking brake.
Bring the front wheels into the straightahead position.
Shift the transmission to position P.
Vehicles with AIRMATIC: make sure that
"normal" level is selected ( Y page 180).
Switch off the engine.
Vehicles without KEYLESS-GO: remove the SmartKey from the ignition lock.
X Vehicles with KEYLESS-GO: open the driver's door.
The on-board electronics have status 0, which is the same as the SmartKey having been removed.
X
X
X
Vehicles with KEYLESS-GO: remove the
Start/Stop button from the ignition lock
( Y page 139).
If included in the vehicle equipment, take the tire-change tool kit out of the vehicle.
Secure the vehicle to prevent it from rolling away.
If your vehicle is equipped with a wheel chock, it can be found in the tire-change tool kit
( Y page 312).
The folding wheel chock is an additional securing measure to prevent the vehicle from rolling away, for example when changing a wheel.
X Fold both plates upwards :.
X Fold out lower plate ;.
X Guide the lugs on the lower plate fully into the openings in base plate =.
Securing the vehicle on level ground
X On level ground: place chocks or other suitable items under the front and rear of the wheel that is diagonally opposite the wheel you wish to change.
Z
350
Changing a wheel
Securing the vehicle on slight downhill gradients
X On light downhill gradients: place chocks or other suitable items in front of the wheels of the front and rear axle.
Raising the vehicle
G WARNING
If you do not position the jack correctly at the appropriate jacking point of the vehicle, the jack could tip over with the vehicle raised.
There is a risk of injury.
Only position the jack at the appropriate jacking point of the vehicle. The base of the jack must be positioned vertically, directly under the jacking point of the vehicle.
! The jack is designed exclusively for jacking up the vehicle at the jacking points.
Otherwise, your vehicle could be damaged.
The following must be observed when raising the vehicle:
R to raise the vehicle, only use the vehiclespecific jack that has been tested and approved by Mercedes-Benz. If used incorrectly, the jack could tip over with the vehicle raised.
R the jack is designed only to raise and hold the vehicle for a short time while a wheel is being changed. It is not suited for performing maintenance work under the vehicle.
R avoid changing the wheel on uphill and downhill slopes.
R before raising the vehicle, secure it from rolling away by applying the parking brake and inserting wheel chocks. Never disengage the parking brake while the vehicle is raised.
R the jack must be placed on a firm, flat and non-slip surface. On a loose surface, a large, load-bearing underlay must be used.
On a slippery surface, a non-slip underlay must be used, e.g. rubber mats.
R do not use wooden blocks or similar objects as a jack underlay. Otherwise, the jack will not be able to achieve its loadbearing capacity due to the restricted height.
R the maximum clearance between the underside of the tire and the ground must be 1.2 in (3 cm).
R never place your hands and feet under the raised vehicle.
R never lie under the raised vehicle.
R never start the engine when the vehicle is raised.
R never open or close a door or the trunk lid when the vehicle is raised.
R make sure that no persons are present in the vehicle when the vehicle is raised.
X Using lug wrench :, loosen the bolts on the wheel you wish to change by about one full turn. Do not unscrew the bolts completely.
Changing a wheel
351
Removing a wheel
! AMG vehicles: during removal and repositioning of the wheel, the wheel rim can strike the ceramic-brake disc and damage it. Therefore, take precautions and get a second person to assist you.
Alternatively, you can use a second alignment bolt.
! Do not place wheel bolts in sand or on a dirty surface. The bolt and wheel hub threads could otherwise be damaged when you screw them in.
X Position jack = at jacking point ;.
X Unscrew the uppermost wheel bolt completely.
X
X
X Screw alignment bolt : into the thread instead of the wheel bolt.
Unscrew the remaining wheel bolts fully.
Remove the wheel.
Example
X Make sure the foot of the jack is directly beneath the jacking point.
X Turn crank ? clockwise until jack = sits completely on jacking point ; and the base of the jack lies evenly on the ground.
X Turn crank ? until the tire is raised a maximum of 1.2 in (3 cm) off the ground.
Mounting a new wheel
G WARNING
Oiled or greased wheel bolts or damaged wheel bolts/hub threads can cause the wheel bolts to come loose. As a result, you could lose a wheel while driving. There is a risk of accident.
Never oil or grease wheel bolts. In the event of damage to the threads, contact a qualified specialist workshop immediately. Have the damaged wheel bolts or hub threads replaced/renewed. Do not continue driving.
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352
Changing a wheel
G WARNING
If you tighten the wheel bolts or wheel nuts when the vehicle is raised, the jack could tip over. There is a risk of injury.
Only tighten the wheel bolts or wheel nuts when the vehicle is on the ground.
Always pay attention to the instructions and safety notes in the "Changing a wheel" section ( Y page 348).
Only use wheel bolts that have been designed for the wheel and the vehicle. For safety reasons, Mercedes-Benz recommends that you only use wheel bolts which have been approved for Mercedes-Benz vehicles and the respective wheel.
! AMG vehicle with ceramic brake
discs: during removal and repositioning of the wheel, the wheel rim can strike the ceramic-brake disc and damage it.
Therefore, take precautions and have a second person assist you. Alternatively, you can use a second alignment bolt.
! To prevent damage to the paintwork, hold the wheel securely against the wheel hub while screwing in the first wheel bolt.
X
X
X
Unscrew the alignment bolt.
Tighten the last wheel bolt until it is fingertight.
Vehicles with a collapsible spare
wheel: inflate the collapsible spare wheel
( Y page 359).
Only then lower the vehicle.
Lowering the vehicle
G WARNING
The wheels could work loose if the wheel nuts and bolts are not tightened to the specified tightening torque. There is a risk of accident.
Have the tightening torque immediately checked at a qualified specialist workshop after a wheel is changed.
! Vehicles with a collapsible spare
wheel: before lowering the vehicle, inflate the collapsible spare wheel with the tire inflation compressor. The wheel rim could otherwise be damaged.
Positioning a wheel (example: vehicle with emergency spare wheel)
X
X
X
Clean the wheel and wheel hub contact surfaces.
Slide the wheel to be mounted onto the alignment bolt and push it on.
Tighten the wheel bolts until they are finger-tight.
Tightening wheel bolts (example: vehicle with emergency spare wheel)
X
X
Turn the crank of the jack counterclockwise until the vehicle is once again standing firmly on the ground.
Place the jack to one side.
X
X
Tighten the wheel bolts evenly in a crosswise pattern in the sequence indicated (: to A). The tightening torque must be 96 lb-ft (130 Nm).
Turn the jack back to its initial position.
Wheel and tire combinations
353
X
X
Stow the jack and the rest of the vehicle tools in the trunk again.
Check the tire pressure of the newly mounted wheel and adjust it if necessary.
Observe the recommended tire pressure
( Y page 329).
i Vehicles with tire pressure monitor: all wheels mounted must be equipped with functioning sensors.
Wheel and tire combinations
General notes
! For safety reasons, Mercedes-Benz recommends that you only use tires and wheels which have been approved by
Mercedes-Benz specifically for your vehicle.
These tires have been specially adapted for use with the control systems, such as ABS or ESP ® , and are marked as follows:
R
MO = Mercedes-Benz Original
R
MOE = Mercedes-Benz Original Extended
(tires featuring run-flat characteristics)
R
MO1 = Mercedes-Benz Original (only certain AMG tires)
Mercedes-Benz Original Extended tires may only be used on wheels that have been specifically approved by Mercedes-Benz.
Only use tires, wheels or accessories tested and approved by Mercedes-Benz.
Certain characteristics, e.g. handling, vehicle noise emissions or fuel consumption, may otherwise be adversely affected. In addition, when driving with a load, tire dimension variations could cause the tires to come into contact with the bodywork and axle components. This could result in damage to the tires or the vehicle.
Mercedes-Benz accepts no liability for damage resulting from the use of tires, wheels or accessories other than those tested and approved.
Information on tires, wheels and approved combinations can be obtained from any qualified specialist workshop.
Overview of abbreviations used in the following tire tables:
R BA: both axles
R
FA: front axle
R RA: rear axle
The recommended pressures for various operating conditions can be found:
R on the Tire and Loading Information placard with the recommended tire pressures on the B-pillar on the driver's side
R in the tire pressure table on the inside of the fuel filler flap
Observe the notes on recommended tire pressures under various operating conditions
( Y page 329).
Check tire pressures regularly, and only when the tires are cold. Comply with the maintenance recommendations of the tire manufacturer in the vehicle document wallet.
Notes on the vehicle equipment – always equip the vehicle with:
R tires of the same size on a given axle (left/ right)
R the same type of tires at a given time
(summer tires, winter tires, MOExtended tires)
Vehicles with MOExtended tires are not equipped with a TIREFIT kit at the factory. It is therefore recommended that you additionally equip your vehicle with a TIREFIT kit if you mount tires that do not feature runflat properties, e.g. winter tires. A TIREFIT kit may be obtained from a qualified specialist workshop.
i Not all wheel and tire combinations are available at the factory for all countries.
i On the following pages, you can find information on approved wheel rims and tire sizes for equipping your vehicle with winter tires. Winter tires are not available
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354
Wheel and tire combinations at the factory as standard equipment or optional extras.
If you would like to equip your vehicle with approved winter tires, you may also, in certain circumstances, require rims of the appropriate size. The sizes of the approved winter tires may deviate from that of the standard tires. This is dependent on the model and the equipment installed at the factory.
The tires and wheel rims, as well as further information, can be obtained at a qualified specialist workshop.
Wheel and tire combinations
355
Tires
CLS 550 BlueEFFICIENCY
Summer tires
R18
Tires
FA: 255/40 R18 99 Y XL MOExtended 4
RA: 285/35 R18 97 Y MOExtended 4, 5
Alloy wheels
FA: 8.5 J x 18 H2
Wheel offset: 1.36 in (34.5 mm)
RA: 9.5 J x 18 H2
Wheel offset: 1.89 in (48 mm)
R19
Tires
FA: 255/35 R19 96 Y XL
RA: 285/30 R19 98 Y XL 5
Alloy wheels
FA: 8.5 J x 19 H2
Wheel offset: 1.36 in (34.5 mm)
RA: 9.5 J x 19 H2
Wheel offset: 1.89 in (48 mm)
All-weather tires
R18
Tires
FA: 255/40 R18 99 H XL M+S
RA: 285/35 R18 97 H M+S 5
Alloy wheels
FA: 8.5 J x 18 H2
Wheel offset: 1.36 in (34.5 mm)
RA: 9.5 J x 18 H2
Wheel offset: 1.89 in (48 mm)
Winter tires
R18
Tires
BA: 255/40 R19 99 V XL M+Si
BA: 255/40 R18 99 V
M+SiMOExtended 4
Alloy wheels
BA: 8.5 J x 18 H2
Wheel offset: 1.36 in (34.5 mm)
BA: 8.5 J x 18 H2
Wheel offset: 1.36 in (34.5 mm)
4
5
MOExtended tires (tires featuring run-flat characteristics) only in combination with an active tire pressure loss warning system or tire pressure monitor.
Use of snow chains is not permitted. Observe the notes under "Snow chains".
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Wheel and tire combinations
CLS 550 4MATIC BlueEFFICIENCY
Summer tires
R18
Tires
FA: 255/40 R18 99 Y XL MOExtended 4
RA: 285/35 R18 97 Y MOExtended 4, 5
Alloy wheels
FA: 8.5 J x 18 H2
Wheel offset: 1.36 in (34.5 mm)
RA: 9.5 J x 18 H2
Wheel offset: 1.89 in (48 mm)
R19
Tires
FA: 255/35 R19 96 Y XL
RA: 285/30 R19 98 Y XL 5
Alloy wheels
FA: 8.5 J x 19 H2
Wheel offset: 1.36 in (34.5 mm)
RA: 9.5 J x 19 H2
Wheel offset: 1.89 in (48 mm)
All-weather tires
R18
Tires
FA: 255/40 R18 99 H XL M+S
RA: 285/35 R18 97 H M+S 5
Alloy wheels
FA: 8.5 J x 18 H2
Wheel offset: 1.36 in (34.5 mm)
RA: 9.5 J x 18 H2
Wheel offset: 1.89 in (48 mm)
Winter tires
R18
Tires
BA: 255/40 R19 99 V XL M+Si
BA: 255/40 R18 99 V
M+SiMOExtended 4
Alloy wheels
BA: 8.5 J x 18 H2
Wheel offset: 1.36 in (34.5 mm)
BA: 8.5 J x 18 H2
Wheel offset: 1.36 in (34.5 mm)
4
5
MOExtended tires (tires featuring run-flat characteristics) only in combination with an active tire pressure loss warning system or tire pressure monitor.
Use of snow chains is not permitted. Observe the notes under "Snow chains".
Emergency spare wheel
357
CLS 63 AMG
Summer tires
R19
Tires
VA: 255/35 ZR19 (96 Y) XL
RA: 285/30 ZR19 (98 Y) XL 5
Alloy wheels
FA: 9.0 J x 19 H2
Wheel offset: 1.46 in (37 mm)
RA: 10.0 J x 19 H2
Wheel offset: 1.85 in (47 mm)
Winter tires
R19
Tires
FA: 255/35 R19 96 V XL M+Si
RA: 255/35 R19 96 V XL M+Si
FA: 255/35 R19 96 V XL M+Si
RA: 285/30 R19 98 V XL M+Si 5
Alloy wheels
FA: 9.0 J x 19 H2
Wheel offset: 1.46 in (37 mm)
RA: 9.5 J x 19 H2
Wheel offset: 2.05 in (52 mm)
FA: 9.0 J x 19 H2
Wheel offset: 1.46 in (37 mm)
RA: 10.0 J x 19 H2
Wheel offset: 1.85 in (47 mm)
Emergency spare wheel
Important safety notes
G WARNING
The wheel or tire size as well as the tire type of the spare wheel or emergency spare wheel and the wheel to be replaced may differ.
Mounting an emergency spare wheel may severely impair the driving characteristics.
There is a risk of an accident.
To avoid hazardous situations:
R adapt your driving style accordingly and drive carefully.
R never install more than one spare wheel or emergency spare wheel that differs in size.
R only use a spare wheel or emergency spare wheel of a different size briefly.
R do not switch ESP ® off.
R have a spare wheel or emergency spare wheel of a different size replaced at the nearest qualified specialist workshop.
Observe that the wheel and tire dimensions as well as the tire type must be correct.
When using an emergency spare wheel or spare wheel of a different size, you must not exceed the maximum speed of 50 mph
(80 km/h).
Snow chains must not be mounted on emergency spare wheels.
5 Use of snow chains is not permitted. Observe the notes under "Snow chains".
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358
Emergency spare wheel
General notes
You should regularly check the pressure of the emergency spare wheel, particularly prior to long trips, and correct the pressure as necessary ( Y page 329). The applicable value is found on the wheel or under "Technical data" ( Y page 361).
An emergency spare wheel may also be mounted against the direction of rotation.
Observe the time restriction on use as well as the speed limitation specified on the emergency spare wheel.
Replace the tires after six years at the latest, regardless of wear. This also applies to the emergency spare wheel.
i When you are driving with the collapsible spare wheel mounted, the tire pressure loss warning system or the tire pressure monitor cannot function reliably. Only restart the tire pressure loss warning system/the tire pressure monitor when the damaged wheel has been replaced with a new wheel.
Vehicles with tire pressure monitor: after mounting an emergency spare wheel, the system may still display the tire pressure of the removed wheel for a few minutes. The value displayed for the mounted emergency spare wheel is not the same as the current tire pressure of the emergency spare wheel.
"Minispare" emergency spare wheel/ collapsible spare wheel
Removing the "Minispare" emergency spare wheel
The emergency spare wheel can be found in the stowage well under the trunk floor.
X
X
Lift the trunk floor upwards ( Y page 275).
Turn stowage tray ; counter-clockwise and remove together with vehicle tool kit tray :.
X Remove "Minispare" emergency spare wheel =.
Removing the collapsible spare wheel
(AMG vehicles)
The emergency spare wheel can be found in the stowage well under the trunk floor.
X
X
X
Lift the trunk floor upwards ( Y page 275).
Reach into cutout : in the tool holder and lift it up.
Remove collapsible spare wheel ;.
Emergency spare wheel
359
For further information on changing and mounting a wheel, see ( Y page 349).
Stowing a used collapsible spare wheel
! Only place the collapsible spare wheel in the vehicle when it is dry. Otherwise, moisture may get into the vehicle.
Take the following steps to stow a used collapsible spare wheel. It will not otherwise install into the spare wheel well. Mercedes-
Benz recommends that you have this work performed at a qualified specialist workshop, e.g. at an authorized Mercedes-Benz Center.
X Unscrew the valve cap from the valve.
X Use the back of the valve cap to unscrew the valve insert from the valve and release the air.
i Fully deflating the tires can take a few minutes.
X
X
X
Screw the valve insert back into the valve.
Screw the valve cap back on.
Remove the protective sheet from the vehicle tool kit and pull it over the collapsible spare wheel.
X Stow the collapsible spare wheel in the emergency spare wheel well under the trunk.
Inflating the collapsible spare wheel
! Inflate the collapsible spare wheel using the tire inflation compressor before lowering the vehicle. The wheel rim could otherwise be damaged.
! Do not operate the tire inflation compressor for longer than eight minutes at a time without a break. It may otherwise overheat.
The tire inflation compressor can be operated again once it has cooled down.
X Mount the collapsible spare wheel as described ( Y page 348).
The collapsible spare wheel must be mounted before it is inflated.
X
X
X
Pull connector ? and the air hose out of the housing.
Remove the cap from the valve on the collapsible spare wheel.
Screw union nut : on the air hose onto the valve.
X
X
X
X
Make sure on/off switch A of the tire inflation compressor is set to 0.
Insert connector ? into the cigarette lighter socket or into a 12 V socket in your vehicle.
Observe the notes on the cigarette lighter
( Y page 280). Observe the notes on sockets ( Y page 281).
Turn the SmartKey to position 1 in the ignition lock ( Y page 139).
Press on/off switch A on the tire inflation compressor to I.
The tire inflation compressor is switched on. The tire is inflated. The tire pressure is shown on pressure gauge =.
X Inflate the tire to the specified tire pressure.
X
The specified tire pressure is printed on the yellow label of the emergency spare wheel.
When the specified tire pressure has been reached, press on/off switch A on the electric air pump to 0.
The tire inflation compressor is switched off.
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360
Emergency spare wheel
X
X
Turn the SmartKey to position 0 in the ignition lock.
If the tire pressure is higher than the specified pressure, press pressure release button ; until the correct tire pressure has been reached.
X
X
X
Unscrew union nut : on the air hose from the valve.
Screw the valve cap onto the collapsible spare wheel valve again.
Stow plug ? and the air hose in the lower section of the blower housing.
X Stow the tire inflation compressor in the vehicle.
Emergency spare wheel
361
Technical data
All vehicles (except AMG vehicles)
"Minispare" emergency spare wheel
Tires
T 155/60 R18 107 M
Tire pressure: 420 kPa (4.2 bar/61 psi)
AMG vehicles
Collapsible spare wheel
Tires
175/50 – 19 97 P
Tire pressure: 350 kPa (3.5 bar/51 psi)
Alloy wheels
4.5 B x 18 H2
Wheel offset: 1.42 in (36 mm)
Alloy wheels
6.5 B x 19 H2
Wheel offset: 0.55 in (14 mm)
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Useful information ............................ 364
Information regarding technical
data .................................................... 364
Genuine Mercedes-Benz parts ......... 364
Warranty ............................................ 364
Identification plates ......................... 365
Service products and filling capaci-
ties ..................................................... 366
Vehicle data ...................................... 371
363

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