2003 Mercedes SL-Class Owner's Manual - Page 236
2003 Mercedes SL-Class Manual
Page 236 highlights
Operation Tires and wheels Regularly check your tire pressure at intervals of no more than 14 days. Tire pressure changes by approximately 1.5 psi (0.1 bar) per 18°F (10°C) of air temperature change. Keep this in mind when checking tire pressure where the temperature is different from the outside temperature. The tire temperature and with it the tire pressure is increased also while driving, depending on the driving speed and the tire load. Checking tire pressure electronically* The tire inflation pressure monitor only functions on wheels that are equipped with the proper electronic sensors. It monitors the tire inflation pressure, as selected by the driver, in all four tires. A warning is issued to alert you to a decrease in pressure in one or more of the tires. Tire pressure inquiries are made using the multifunction display ( page 110). The present inflation pressures are displayed only after a few minutes travel time. You can select the unit of measure used for the tire inflation pressure by changing the setting in the control system ( page 129). i Possible differences between the readings of a tire pressure gauge of an air hose, e.g. gas station equipment, and the vehicle's control system can occur. The readings issued by the control system are more precise. Switch on ignition. Press k button until the current inflation pressures for each tire appear in the tachometer display field. Warning! G The tire inflation pressure monitor does not indicate a warning for wrongly selected inflation pressures. Always adjust tire inflation pressure according to the label on the fuel filler flap. The tire inflation pressure monitor is not able to issue a warning due to a sudden loss of pressure (e.g. tire puncture caused by a foreign object). In the event of a sudden loss of pressure, bring the vehicle to a halt by carefully applying the brakes and avoiding abrupt steering maneuvers. 236