2007 Mercedes GL-Class Owner's Manual - Page 405

Operation Tires and wheels Reactivating Advanced TPMS* The TPMS must be reactivated when you have adjusted the tire inflation pressure to a new level (e.g. because of different load or driving conditions). The TPMS is then recalibrated to the current tire inflation pressures. Warning! Underinflation also reduces fuel efficiency and tire tread life, and may effect the vehicle's handling and stopping ability. Please note that the TPMS is not a substitute for proper tire maintenance, and it is the driver's responsibility to maintain correct tire pressure, even if under-inflation has not reached the level to trigger illumination of the TPMS low tire pressure telltale. i Reactivate the TPMS after adjusting the tire inflation pressure to the inflation pressure recommended for the vehicle operating condition. Tire pressure should only be adjusted on cold tires. Observe the recommended tire inflation pressure on the Tire and Loading Information placard on the driver's door B-pillar ( page 389). Some vehicles may have supplemental tire inflation pressure information for driving at high speeds ( page 395) or for vehicle loads less than the maximum loaded vehicle condition ( page 395). If such information is provided, it can be found on the inside of the fuel filler flap. G i Operating radio transmission equipment (e.g. wireless headsets, two-way radios) in or near the vehicle could cause the TPMS to malfunction. 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. Using the Tire and Loading Information placard on the driver's door B-pillar ( page 389) or, if available, the supplemental tire inflation pressure information on the inside of the fuel filler flap ( page 375), make sure the tire inflation pressure of all four tires is correct. Press button è or ÿ on the multifunction steering wheel repeatedly until the standard display menu appears in the multifunction display ( page 157). Press the j or k button repeatedly until you see the current inflation pressures for each tire appear in the display or the following message appears in the display 404