2011 Mercedes C-Class Owner's Manual - Page 281

Tire pressures i If a spare wheel/emergency spare wheel is mounted, the system may continue to show the tire pressure of the wheel that has been removed for a few minutes. If this occurs, note that the value displayed for the position where the spare wheel is mounted is not the same as the spare wheel/emergency spare wheel's current tire pressure. TPMS warning messages If the tire pressure monitor detects a significant pressure loss on one or more tires, a warning message is shown in the multifunction display. A warning tone also sounds and the tire pressure warning lamp lights up in the instrument cluster. Each tire that is affected by a significant loss of pressure is highlighted by a red rectangle. If the Correct Tire Pressure message appears in the multifunction display: X Check the tire pressure on all four wheels and correct it if necessary. changed handling or load characteristics, for example). The TPMS then monitors the new tire pressure values. Restart the tire pressure monitor after you have set the tire pressure to the value recommended for the desired driving situation (Y page 272). Only correct tire pressures on cold tires. Comply with the recommended tire pressures on the Tire and Loading Information placard on the B-pillar on the driver's side Additional tire pressure values for driving at high speeds or with heavy loads can be found in the Tire Pressure table on the inside of the fuel filler flap. X Make sure that the tire pressure is correct on all four wheels. X Make sure that the SmartKey is in position 2 in the ignition lock. X Press the = or ; button to select the Service menu. X Press the 9 or : button to select Tire Pressure. X Press the a button. The current tire pressure of each wheel or the Tire pressures will be displayed after driving a few minutes message is shown in the multifunction display. X Press the : button. The Use Current Pressures as New Reference Values message appears in the multifunction display. If you wish to confirm the restart: X 279 i If the wheel positions on the vehicle are interchanged, the tire pressures may be displayed for the wrong positions for a short time. This is rectified after a few minutes of driving, and the tire pressures are displayed for the correct positions. Restarting the tire pressure monitor G Warning It is the driver's responsibility to set the tire inflation pressure to the recommended cold tire inflation pressure. Underinflated tires affect the ability to steer or brake the vehicle. You might lose control over the vehicle. When you restart the tire pressure monitor, all existing warning messages are deleted and the warning lamps go out. The monitor uses the currently set tire pressures as the reference values for monitoring. The TPMS must be restarted when you set the tire pressure to a new value (as a result of Press the a button. The Tire Press. Monitor Restarted message appears in the multifunction display. After driving for a few minutes, the system checks whether the current tire pressures are within the specified range. The new tire pressures are then accepted as reference values and monitored. Z Tires and wheels