2009 Mercedes CLS-Class Owner's Manual - Page 220

Operation Tires and wheels telltale illuminates, you should stop and check your tires as soon as possible. Driving on a significantly underinflated tire causes the tire to overheat and can lead to tire failure. Underinflation also reduces fuel efficiency and tire tread life, and may affect 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 underinflation has not reached the level to trigger illumination of the TPMS low tire pressure telltale. Tire pressure inquiries are made using the multifunction display. The present inflation pressures are displayed only after a few minutes' travel time. standard display appears in the multifunction display (Y page 126). X is mounted does not reflect the actual spare tire inflation pressure. Press button j or k until the current inflation pressures for each tire appear in the multifunction display. i Operating radio transmission equipment (e.g. wireless headsets, two-way radios) in or near the vehicle could cause the TPMS to malfunction. Tire inflation pressure warnings If the system detects a significant loss of tire inflation pressure in one or more than one tire, a message appears in the multifunction display. i When the vehicle has been parked for longer than 20 minutes, the message appears in the multifunction display. G Warning! 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 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. X X Example illustration The respective tire is indicated by a red rectangle. In addition, a warning signal sounds. Restarting Advanced TPMS Switch on the ignition. Press button è or ÿ on the multifunction steering wheel repeatedly until the G Warning! It is the driver's responsibility to calibrate the TPMS on the recommended cold infla- 218