2007 Mercedes G-Class Owner's Manual - Page 291

Operation Tires and wheels The TPMS 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.The present inflation pressures are displayed only after a few minutes travel time. Switch on the ignition ( page 39). Press button j or k until the current inflation pressures for each tire appear in the multifunction display. Warning! G It is the driver's responsibility to calibrate the TPMS on the recommended cold inflation pressure. Underinflated tires affect the ability to steer or brake the vehicle. You might lose control over the vehicle. i With a spare wheel mounted, the system may still indicate the tire inflation pressure of the removed road wheel for some minutes. If this happens, keep in mind that the indicated value where the spare wheel is mounted does not reflect the actual spare tire inflation pressure. Example illustration 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. Usually the readings issued by the control system are more precise. i When the vehicle has been parked for longer than 20 minutes, the message Tire pressure displayed only after driving for a few minutes appears in the multifunction display. 290