2011 Mercedes E-Class Owner's Manual - Page 309

Tire pressures pressure can be checked in the on-board computer. 307 G Warning! Should the tire pressure drop repeatedly: Rcheck the tire for foreign bodies. Rcheck whether the wheel is losing air or the valve is leaking. Rmake sure that only a valve cap approved by Mercedes-Benz is installed on the tire valve. tire pressure that is too low have a negative effect on vehicle safety, which could lead you to cause an accident. Only correct tire pressures when the tires are cold. The tires are cold when the vehicle has been parked for at least three hours or has been driven less than 1 mile (1.6 km) in this time. The tire temperature changes depending on the outside temperature, the vehicle speed and the tire load. A change in tire temperature of 18 ‡ (10 †) changes the tire pressure by approximately 10 kPa (0.1 bar/1.5 psi). Take this into account when checking the pressure of warm tires and 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. Comply with the recommended tire pressure specifications for cold tires on the Tire and Load Information placard on the B-pillar on the driver's side of your vehicle. On the Tire and Load Information placard you will find recommended tire pressure information : for cold tires on a fully laden vehicle. The tire pressure information is applicable to all tires mounted at the factory. Important notes on tire pressures G Warning If the tire pressure drops repeatedly, check the tires for punctures from foreign objects and/or whether air is leaking from the valves or from around the rim. i The following data on the Tire and Load Information placard is given as an example. Tire pressure specifications are vehiclespecific and may deviate from the data shown here. The tire pressures applicable to your vehicle can be found on the Tire and Loading Information placard on your vehicle. The tire temperature and pressure increase when the vehicle is in motion. This is dependent on the driving speed and the load. If you wish to drive at high speeds of 100 mph (160 km/h) or higher when this is allowed, use the tire pressure table on the inside of the fuel filler flap to set the correct tire pressures when the wheels are cold. If the tire pressure is not set correctly, this can lead to an excessive build up of heat and a sudden loss of pressure. For more information, contact a qualified specialist workshop, e.g. an authorized Mercedes-Benz Center. i Ride comfort may be affected if the tire pressure is adjusted to the recommended value for speeds of over 100 mph (160 km/h). Make sure that the tire pressure for normal speeds is adopted again. Z Tires and wheels