Mercedes-Benz

Notes on tyre pressure

WARNING Risk of accident due to insufficient or excessive tyre pressure

Underinflated or overinflated tyres pose the following risks:

The tyres may burst, especially as the load and vehicle speed increase.
The tyres may wear excessively and/or unevenly, which may greatly impair tyre traction.
The driving characteristics, as well as steering and braking, may be greatly impaired.

Comply with the recommended tyre pressure and check the tyre pressure of all tyres including the spare wheel regularly:

at least once a month
when the load changes
before embarking on a longer journey
if operating conditions change, e. g. off-road driving

Adjust the tyre pressure as necessary.

Driving with tyre pressure that is too high or too low can:

Shorten the service life of the tyres.
Cause increased tyre damage.
Adversely affect handling characteristics and thus driving safety, e.g. due to aquaplaning.

WARNING Risk of accident from repeated tyre pressure drop

If the tyre pressure drops repeatedly, the wheel, valve or tyre may be damaged.

Insufficient tyre pressure can cause the tyres to burst.

Inspect the tyre for signs of foreign objects.

Check whether the wheel or valve has a leak.

If you are unable to rectify the damage, contact a qualified specialist workshop.

Information on the recommended tyre pressure for the vehicle's factory-fitted tyres can be found on the tyre pressure table on the driver's seat base or on the B‑pillar on the driver's side More.

Use a suitable pressure gauge to check the tyre pressure. The outer appearance of a tyre does not permit any reliable conclusion about the tyre pressure.

Vehicles with a tyre pressure monitor: you can also check the tyre pressure using the on-board computer.

Crewbuses with a GVWR of 3.0 t and 3.5 t: when changing from 245/65 R17XL tyres to one of the other approved tyre sizes and vice versa, the permissible pressure range of the tyre pressure monitor must be recoded. Contact a qualified Mercedes-Benz specialist workshop for this purpose.

Only check tyre pressures when the tyres are cold. Conditions for cold tyres:

The vehicle has been parked with the tyres out of direct sunlight for at least three hours.
The vehicle has travelled less than 1.6 km.

A rise in the tyre temperature of 10 °C increases the tyre pressure by approx. 10 kPa (0.1 bar/1.5 psi). Take this into account when checking the tyre pressure of warm tyres.

Notes on trailer operation

The applicable tyre pressure for the tyres of the rear axle is always the recommended tyre pressure for a full load.