2011 Mercedes CL-Class Owner's Manual - Page 449

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. For each tire that is affected by a significant loss of pressure, the tire pressure is shown in yellow. 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. Restart the tire pressure monitor after you have set the tire pressure to the value recommended for the desired driving situation (Y page 441). 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 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 447 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 changed handling or load characteristics, for example). The TPMS then monitors the new tire pressure values. Press the a button. The Tire Pressure 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. Press the % button. The tire pressure values stored at the last restart will continue to be monitored. If you wish to cancel the restart: X i Canada only: in most cases, the tire pressure monitor recognizes the new reference values automatically. However, you can also define reference values manually as described here. Z Tires and wheels 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.