2002 Mercedes ML-Class Owner's Manual - Page 237

Instruments and controls Parking system Operation Driving Instrument cluster display Practical hints Car care Technical data Index 234 Parktronic switch All yellow and one or both red segments light up. Additionally, there is an acoustic warning lasting approximately 3 seconds. The obstacle may not be recognized if outside the shaded sensor field, and no longer be indicated when approaching it any closer (warning indicators go out). Parktronic malfunction All red segments of the warning indicators light up, and a warning sounds for 3 seconds, if Parktronic does not function properly. A dirty sensor or other ultrasonic signals could be the reason. See page 301 for instructions on cleaning the sensors in the bumpers. After cleaning the sensors, turn electronic key in steering lock to position 2. If a malfunction continues to be displayed, have the system checked at your authorized Mercedes-Benz Center. 3 The switch is located on the center console. 1 Parktronic switched off 2 Parktronic switched on 3 Indicator lamp - comes on when Parktronic is switched off The parktronic system is switched on again when turning the electronic key in steering lock position 2.