Important notes on tire pressure
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.
• Check the tire for foreign objects.
• 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.
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:
• if the vehicle has been parked without
direct sunlight on the tires for at least three
hours and
• 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 º F (10 º C), 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 tires. The tire pressure would otherwise be too low.
Observe the recommended tire pressures for
cold tires:
• on the Tire and Loading Information placard
on the B-pillar on the driver's side
• in the tire pressure table on the inside of
the fuel filler flap
Observe the following for the tire pressure on
the spare wheel:
• the tire and loading information table on
the B-pillar on the driver's side.
• the tire pressure sticker on the inside of the fuel filler flap.
See also:
M+S tires
WARNING
M+S tires with a tire tread depth of less than
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 tr ...
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