Tyres and wheels
Points to remember
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For safety reasons,
Mercedes-Benz recommends that you only use tyres and wheels which have been
approved by Mercedes-Benz specifically for your vehicle. These tyres have been
specially adapted for use with the control systems, such as ABS or ESP®,
and are marked as follows:
Mercedes-Benz Original Extended
tyres* should only be used on
wheels that have been specifically approved by Mercedes-Benz.
If you use other tyres and
wheels, Mercedes-Benz cannot accept any responsibility for damage that may
result from this. Further information about tyres, wheels and approved
combinations can be obtained from any Mercedes-Benz Service Centre.
If you use tyres other than those
tested and recommended for Mercedes-Benz vehicles, characteristics such as
handling, vehicle noise emissions and fuel consumption may be adversely
affected. In addition, the wheels may come into contact with the body or axle
components when heavily loaded or when driving with snow chains. This could
result in damage to the tyres or the vehicle.
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Retreaded tyres are neither tested nor recommended by Mercedes-Benz, since previous damage cannot always be detected on retreaded tyres. As a result, Mercedes-Benz cannot guarantee vehicle safety if retreaded tyres are fitted. Do not fit used tyres if you have no information about their previous usage.
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 | Risk of accident |
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If wheels or tyres other than those which have been tested are fitted:
This could cause an accident.
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Modification work on the brake system and wheels is not permitted, nor is the use of spacer plates or brake dust shields. This invalidates the General Operating Permit for the vehicle.
Notes on selecting, fitting and replacing tyres
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Only fit tyres and wheels of the same type and make.
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Only fit tyres of the correct size onto the wheels.
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After fitting new tyres, run them in at moderate speeds for the first 100 km as they only reach their full performance after this distance.
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Fit new tyres on the front wheels first if tyres of the same size are required on the front and rear wheels.
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Replace the tyres after six years at the latest, regardless of wear. This also applies to the spare wheel*.
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Do not drive with tyres which have too little tread depth as this significantly reduces the traction on wet roads (aquaplaning).
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Store tyres that are not being used in a cool, dry and preferably dark place. Protect the tyres against oil, grease, petrol and diesel.
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Notes on regularly inspecting wheels and tyres
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Regularly check the wheels and tyres of your vehicle for damage (e.g. cuts, punctures, tears, bumps on tyres and deformation, cracks or severe corrosion on wheels), at least every 14 days, as well as after off-road trips or after travelling on rough roads. Damaged wheels could cause a loss of tyre pressure.
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Regularly check the tyre tread depth and the condition of the tread across the whole width of the tyre more. If necessary, turn the front wheels to full lock in order to inspect the inner side of the tyre surface.
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All wheels must have a valve cap to protect the valve against dirt and moisture.
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Regularly check the pressure of all your tyres (including the spare tyre*), particularly prior to long trips, and correct the pressure as necessary more.
Notes on driving
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While driving, pay attention to vibrations, noises and unusual handling characteristics, e.g. pulling to one side. This may indicate that the wheels or tyres are damaged. If you suspect that a tyre is defective, reduce your speed and stop the vehicle as soon as possible to check the wheels and tyres for damage. Hidden tyre damage could also be causing the unusual handling characteristics. If you find no signs of damage, have the wheels and tyres inspected at a specialist workshop, for example at a Mercedes-Benz Service Centre.
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When parking your vehicle, make sure that the tyres do not get deformed by the kerb or other obstacles. If it is necessary to drive over kerbs, speed humps or similar, try to do so slowly and at an obtuse angle. Otherwise, the tyres, particularly the sidewalls, could get damaged.
Direction of rotation
Direction of rotation
Tyres with a specified direction of rotation have additional benefits, e.g. if there is a risk of aquaplaning. You will only gain these benefits if the correct direction of rotation is observed.
An arrow on the sidewall of the tyre indicates its correct direction of rotation.
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You may fit a spare tyre* against the direction of rotation.
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MOExtended run-flat system*
The MOExtended run-flat system allows you to continue driving the vehicle even when one or more tyres lose all air pressure.
The MOExtended run-flat system may only be used in conjunction with the tyre pressure loss warning system or the tyre pressure monitor* and on wheels specifically tested by Mercedes-Benz.
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Vehicles with MOExtended run-flat system are not equipped with the TIREFIT kit*
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It is therefore recommended to additionally equip your vehicle with the TIREFIT kit* when fitting tyres that do not feature run-flat properties, e.g. winter tyres.
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A TIREFIT kit* is available from any qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.
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You will find notes on driving with a flat tyre in the "Practical advice" section more.
Tyre tread
| Risk of accident |
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Bear in mind that:
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tyre grip decreases rapidly on wet roads when the tread depth is less than 3 mm. You should thus replace tyres that have insufficient tread.
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winter tyres should be replaced when the tread depth is 4 mm or less because otherwise they no longer provide adequate grip.
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the tread on a tyre may not wear evenly. You should thus regularly check the tread depth and the condition of the tread across the entire width of all tyres. If necessary, turn the steering wheel so that you can see the tyre tread more easily.
You could otherwise lose control of the vehicle and cause an accident due to the reduced grip of the tyres on the road.
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Tyre pressures
| Risk of accident |
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Tyre pressure that is either too high or too low has a negative effect on the vehicle’s driving safety, which could lead you to cause an accident. You should therefore regularly check the pressure of all your tyres (including the spare tyre*), particularly prior to long trips, and correct the pressure as necessary.
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To test tyre pressure, use a suitable pressure gauge. The outer appearance of a tyre does not permit any reliable conclusion about the tyre pressure. On vehicles fitted with the electronic tyre pressure monitor*, the tyre pressure can be checked in the on-board computer.
If the vehicle is to be heavily laden or driven at high speeds, the tyre pressure must be adapted according to the specifications given in the fuel filler flap more.
Use the highest specified tyre pressure for the spare wheel*.
| Risk of accident |
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Should the tyre pressure drop repeatedly:
Tyre pressure that is too low has a negative effect on the vehicle’s active safety, which could lead to your causing an accident.
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Tyre pressure changes by approximately 0.1 bar for every 10 °C change in ambient temperature.
If you measure the tyre pressure in enclosed spaces where the temperature differs from the outside temperature, you will have to correct the measured value accordingly.
When the vehicle is driven, the tyre temperature, and with it the tyre pressure, will increase depending on the road speed and the load on the tyres.
Therefore, you should only correct tyre pressures when the tyres are cold.
The pressure of warm tyres should only be corrected if it is too low for the current operating conditions.
You will find a table of tyre pressures for various operating conditions on the inside of your vehicle's fuel filler flap.
Driving with tyre pressure that is too high or too low can:
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shorten the service life of the tyres
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cause increased tyre damage
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have a negative effect on handling characteristics (e.g. by causing aquaplaning)
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The tyre pressure values given for low loads are minimum values which offer you good ride comfort characteristics.
You can, however, also use the values given for higher loads. These are permissible and will not adversely affect the running of the vehicle.
Also check the tyre pressure of the spare wheel*.
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 | Environmental note |
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Check the tyre pressure regularly, at least every 14 days.
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Tyre pressure loss warning system
| Risk of accident |
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The tyre pressure loss warning system does not warn you of an incorrectly set tyre pressure. The table on the inside of the fuel filler flap will help you decide whether the tyre pressures should be corrected.
The tyre pressure loss warning system does not replace the need to regularly check your vehicle's tyre pressures, since an even loss of pressure on several tyres at the same time cannot be detected by the tyre pressure loss warning system.
The tyre pressure loss warning system is not able to warn you of a sudden loss of pressure, e.g. if the tyre is penetrated by a foreign object.
In the event of a sudden loss of pressure, bring the vehicle to a halt by braking carefully. Do not make any sudden steering movements when doing so.
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While the vehicle is in motion,
the tyre pressure loss warning system monitors the set tyre pressure using the
rotational speed of the wheels. This enables the system to detect
significant pressure loss in a tyre. 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 multi-function display.
The function of the tyre pressure
loss warning system is limited or delayed if:
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snow chains are fitted to your
vehicle's tyres
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road conditions are
wintry
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you are driving on sand or
gravel
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you adopt a very sporty driving
style (cornering at high speeds or driving with high rates of
acceleration)
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you are driving with a heavy load
(in the vehicle or on the roof)
Restarting the tyre pressure
loss warning system
Restart the tyre pressure loss
warning system if you have:
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changed the tyre
pressure
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changed the wheels or
tyres
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fitted new wheels or
tyres
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Before restarting, consult the
table of tyre pressures on the inside of the fuel filler flap to ensure that
the tyre pressure in all four tyres is set correctly for the operating
conditions concerned.
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Also observe the notes in the
section on tyre pressures
more.
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| Risk of accident |
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The tyre pressure loss warning system can only give reliable warnings if you have set the correct tyre pressure.
If an incorrect tyre pressure is set, these incorrect values will be monitored.
A tyre with insufficient pressure results in an instability of the vehicle when driving, thus increasing the risk of an accident.
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Make sure that the key is in
position 2 in the ignition lock.
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The standard display appears in
the multi-function display
more.
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Press
 or
 to select the
tyre pressure function:
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Run Flat Indicator active
Menu: R-Button
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Press the reset button on the
left of the instrument cluster.
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The following message appears in
the multi-function display:
Restart Run Flat Indicator?
Yes
Cancel
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If you
wish to confirm the restart:
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Press the
button.
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The following message appears in
the multi-function display:
Run
Flat Indicator restarted
After a teach-in period, the tyre
pressure loss warning system will monitor the set tyre pressures of all four
tyres.
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If you
wish to cancel the restart:
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Press the
button.
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Wait until the message
Restart Run Flat Indicator?
Yes Cancel disappears.
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The tyre pressure values stored
at the last restart will continue to be monitored.
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Checking the tyre pressure electronically*
The tyre pressure monitor only functions if the correct wheel electronics are fitted to all wheels. These monitor the pressure in all four tyres, which you have set when restarting the tyre pressure monitor. The monitor warns you when the pressure drops in one or more of the tyres.
| Risk of accident |
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The tyre pressure monitor does not warn you of an incorrectly set tyre pressure. The table on the inside of the fuel filler flap will help you decide whether the tyre pressures should be corrected.
The tyre pressure monitor is not able to warn you of a sudden loss of pressure, e.g. if the tyre is penetrated by a foreign object. In the event of a sudden loss of pressure, bring the vehicle to a halt by braking carefully. Do not make any sudden steering movements when doing so.
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The operation of the tyre 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.
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If you are carrying a deflated tyre in the vehicle, you may only reactivate the tyre pressure monitor if:
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Calling up the tyre pressure using the on-board computer
The current tyre pressure for each wheel will be displayed.
If the vehicle has been parked for longer than 20 minutes or you have not driven faster than 25 km/h since the vehicle was parked, the following message appears:
Tyre pressure displayed only after driving for a few minutes
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The tyre pressure values indicated by the on-board computer may differ from those measured at a filling station with a pressure gauge. The tyres pressures shown by the on-board computer refer to those measured at sea level. The tyre pressure values indicated by the on-board computer may differ when the vehicle is at high altitude. In this case, do not reduce the tyre pressures.
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Tyre pressure warning
If the tyre pressure on one or more wheels drops significantly, a message appears in the multi-function display.
The tyre pressure of the affected wheel(s) will be displayed in a red rectangle. You will also hear a warning tone.
Restarting the tyre pressure monitor
In most cases, the tyre pressure monitor will automatically detect the new reference values, e.g. if you have:
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changed the tyre pressure
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changed the wheels or tyres
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fitted new wheels or tyres
If you wish to define the new reference values manually:
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Use the table on the inside of the fuel filler flap to ensure that the tyre pressure is set correctly in all four tyres for the current operating conditions.
Also observe the notes in the section on tyre pressures more.
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Make sure that the key is in position 2 in the ignition lock.
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The standard display appears in the multi-function display more.
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Press the or button to select the Tyre pressure function or wait until the following message appears:
Tyre pressure displayed only after driving for a few minutes
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Press the reset button on the left of the instrument cluster more.
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The following message appears in the multi-function display: Check current tyre pressure?
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Press the button.
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The following message appears in the multi-function display:
Tyre pressure monitor restarted
The tyre pressure monitor has stored the pressure of the tyres as a new reference value.
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If you wish to cancel the restart:
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Press the button.
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