2011 Mercedes E-Class Owner's Manual - Page 314

312 Tire pressures then remain illuminated. This sequence will continue upon subsequent vehicle start-ups as long as the malfunction exists. When the malfunction indicator is lit, the system may not be able to detect or signal low tire pressure as intended. TPMS malfunctions may occur for a variety of reasons, including the installation of incompatible replacement or alternate tires or wheels on the vehicle that prevent the TPMS from functioning properly. Always check the TPMS malfunction indicator after replacing one or more tires or wheels on your vehicle to ensure that the replacement or alternate tires and wheels allow the TPMS to continue to function properly. i This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: 1. This device may not cause harmful interference, and 2. This device must withstand any interference received, including interference that may cause undesired operation. Any unauthorized modification to this device could void the user's authority to operate the equipment. Checking the tire pressure electronically X Tires and wheels i If the tire pressure monitoring system malfunctions, it may take up to 10 minutes before the malfunction is displayed to you by the tire pressure warning lamp flashing for 60 seconds and then remaining lit. When the error has been rectified, the tire pressure warning lamp goes out after a few minutes of driving. Information on tire pressures is displayed in the multifunction display. After a few minutes of driving, the current tire pressure of each tire is shown in the multifunction display. Make sure that the key is in position 2(Y page 151) in the ignition lock. X Using = or ;, select the Serv. menu. X Using 9 or :, select Tire Pressure. X Press the a button. The current tire pressure of each tire is shown in the multifunction display. If the vehicle has been parked for longer than 20 minutes and subsequently you have not driven faster than 15 mph (25 km/h), the Tire pressures will be displayed after driving for a few minutes message is shown. After a teach-in process, the tire pressure monitor automatically detects new wheels or new sensors. As long as it is not possible to allocate tire pressure values to individual wheel positions, the Tire Pressure Monitor Active message appears instead of the tire pressure display. The tire pressures are already being monitored. i The tire pressure values in the on-board computer may deviate from the inflation pressure as measured using a tire pressure checker at the filling station. The tire pressures shown in the on-board computer refer to pressures at sea level. At high altitudes, a tire pressure checker will display a higher tire pressure than the onboard computer. In this case do not reduce the tire pressure. i If radio transmitting equipment (e.g. radio headphones, a two-way radio) is operated in or near the vehicle, this can lead to the function of the tire pressure monitor being impaired. i If a spare wheel is installed, 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 emergency spare wheel/spare wheel is