2009 Mercedes CLS-Class Owner's Manual - Page 271

Practical hints Vehicle status messages in the multifunction display Display messages Tire Pressure Monitor Currently Unavailable Possible cause/consequence The TPMS (USA only) or Advanced TPMS (Canada only) is unable to monitor the tire pressure due to a nearby radio interference source or insufficient power supply. Vehicles with Advanced TPMS (Canada only): The tire pressure is too low in one or more tires. or The tire pressures of the individual tires differ from each other significantly. The tire pressure values are shown in the multifunction display. Vehicles with Advanced TPMS (Canada only): One or more tires are deflating. The respective tire is indicated in the multifunction display. Possible solution As soon as the causes of the malfunction have been removed, the TPMS or Advanced TPMS automatically becomes active again after a few minutes driving. X Please correct the tire pressure. Check and correct tire inflation pressure as required (Y page 212). Caution Tire Pressure Tire Defect X X Carefully bring the vehicle to a halt, avoiding abrupt steering and braking maneuvers. If necessary, change the wheel (Y page 314). Z 269