Useful information about wheels and tyres
Introduction to the topic
The tyres are the most heavily loaded and most underestimated parts of a vehicle. Tyres are very
important as the narrow tyre surfaces are the only contact between the vehicle and the road.
The service life of tyres is dependent on tyre pressure, driving style, handling and correct fitting.
WARNING
New tyres or tyres which are old, worn down or damaged cannot provide full levels of vehicle
control and braking efficiency.
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Incorrect handling of wheels and tyres can reduce vehicle safety and cause accidents and
serious injuries.
All four wheels must be fitted with radial tyres of the same type, size (rolling circumference)
and the same tread pattern.
New tyres will have to be run in as they will initially have reduced grip and braking effect.
Drive particularly carefully for the first 600 km in order to prevent accidents and serious
injury.
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Check tyre pressures regularly when the tyres are cold, and always keep to the specified
value. If the tyre pressure is too low, it is possible that the tyre temperature will increase to
such an extent when driving that the tread peels off and the tyre bursts.
Never drive with worn tyres or tyres that are damaged (i.e. they have holes, cuts, cracks or
blisters). Driving with tyres in this condition can result in burst tyres, accidents and serious
injuries. Worn or damaged tyres must be replaced as soon as possible.
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Never exceed the top speed and load permitted for the fitted tyres.
The effectiveness of the driver assist systems and brake support systems depends on the
tyre grip.
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If you notice unusual vibrations or if the vehicle pulls to one side when driving, stop the car
immediately and check the wheels and tyres for damage.
In order to reduce the risk of losing control of the vehicle, and the risk of accident and
serious injury, never loosen the bolts on rims with bolted-on rim rings.
Do not use wheels or tyres if you do not know their history. Used wheels and tyres could be
damaged, even if the damage is not visible.
Even if they have not been used, old tyres can suddenly lose pressure or burst, especially at
high speeds, and thus cause accidents and serious injuries. Avoid using tyres that are more
than six years old. If you have no alternative, drive slowly and with extra care at all times.
WARNING
If the wheels are incorrectly fastened or if wheel bolts are missing, the wheels could come
loose, leading to a loss of control of the vehicle, causing accidents and serious injuries.
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Never drive if wheel bolts are missing or loose.
Always use wheel bolts that match the wheel rims and the vehicle type.
Always tighten the wheel bolts with the correct tightening torque. If you do not have a
torque wrench available, tighten the wheel bolts with the wheel bolt wrench and have the
torque checked without delay by the nearest qualified workshop.