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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 are 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 which have been tested and recommended for Mercedes-Benz, characteristics such as handling, noise levels and fuel consumption could be adversely affected. In addition, when driving with a load or when using snow chains, dimensional variations and different tyre deformation characteristics could cause the tyres to make contact with the bodywork and axle components. 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. Any such modifications would invalidate the vehicle's general operating permit.
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 rims 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 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 potholes, try to do so slowly and at an obtuse angle. Otherwise the tyres, particularly the sidewalls, could get damaged.
Notes on cleaning the wheels
Do not use powerful cleaning devices such as high-pressure cleaning equipment, as this could damage the tyres.
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Do not clean your wheel rims with acidic wheel cleaner as this will cause the wheel bolts and, if the wheels are fitted at the time, the brakes and brake discs to rust. You can obtain details about acid-free wheel cleaner as well as further information on wheel care at your Mercedes Benz Service Centre.
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Direction of rotation
Tyres with a specified direction of rotation have additional benefits, e.g. if there is a risk of aquaplaning. These benefits will only be available to you 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 must only be used in conjunction with the tyre pressure loss warning system* and on wheels specifically tested by Mercedes-Benz.
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 depth.
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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 active 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.
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*.
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If a tyre's pressure drops repeatedly:
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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 indoors 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. Warm tyres always have higher pressures than cold tyres.
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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has 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. However, ride comfort will be impaired to some degree.
Also check the tyre pressure of the spare wheel*.
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 | Environmental note |
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Check the tyre pressure regularly, and at least every 14 days.
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Tyre pressure loss warning system
While the vehicle is in motion, the tyre pressure loss warning system monitors the set tyre pressure using the 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 towing a very heavy or large trailer
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you are driving with a heavy load (in car, boot or on roof)
| 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. following penetration 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 this.
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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 has been set, this incorrect value will be used for monitoring purposes.
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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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You will see the following message in the multi-function display:
Restart Run Flat Indicator?
Cancel Yes
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If you wish to confirm the restart:
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Press the  button.
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You will see the following message 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 goes out.
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The tyre pressure values stored at the last restart will continue to be monitored.
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Interchanging the wheels
| Risk of accident |
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Interchange the front and rear wheels only if they have the same dimensions, for example size, offset, etc.
After every wheel interchange/change, have the tightening torque checked at a qualified specialist workshop that has the necessary specialist knowledge and tools to carry out the work required. Mercedes-Benz recommends that you use a Mercedes-Benz Service Centre for this purpose. In particular, work relevant to safety or on safety-related systems must be carried out at a qualified specialist workshop.
The wheels could work loose if they are not tightened to a tightening torque of 110 Nm.
For safety reasons, Mercedes-Benz recommends that you only use wheel bolts of the correct size which have been approved for Mercedes-Benz vehicles.
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The wheels may be interchanged every 5,000 km to 10,000 km depending on the degree of tyre wear, provided that the vehicle has the same size front and rear tyres. Do not reverse the direction of tyre rotation.
The wear patterns on the front and rear tyres differ depending on the operating conditions. Interchange the wheels before a clear wear pattern has formed on the tyres. The front tyres typically wear more on the shoulders and the rear tyres in the centre.
Clean the contact surfaces of the wheel and the brake disc thoroughly every time a wheel is interchanged. Check the tyre pressure and, if necessary, restart the tyre pressure loss warning system*.
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