2006 Mercedes R-Class Owner's Manual - Page 279

Controls in detail Driving systems Parktronic system malfunction If only the red distance segments illuminate and an acoustic warning sounds, there is a malfunction in the Parktronic system. The Parktronic system will automatically switch off after 20 seconds and the indicator lamp in the Parktronic switch comes on. Have the Parktronic system checked by an authorized Mercedes-Benz Light Truck Center as soon as possible. If only the red distance segments illuminate and no acoustic warning sounds, the Parktronic system sensors are dirty (e.g. slush, snow or ice) or there is an interference from other radio or ultrasonic signals (e.g. working jackhammers, car wash or the air brakes of trucks). The Parktronic system will automatically switch off after 20 seconds and the indicator lamp in the Parktronic switch comes on. Switch off the ignition ( page 38). Clean the Parktronic system sensors ( page 399). Switch on the ignition ( page 38). or Check the Parktronic system operation at another location to rule out interference from outside radio or ultrasonic signals. 278