2004 Mercedes ML-Class Owner's Manual - Page 154

Controls in detail Driving systems Monitoring reach of sensors The sensors must be free of dirt, ice and snow or they will be unable to function properly. Clean the sensors regularly without scratching or damaging them. Front sensors Center Corners Rear sensors Center Corners approx. 47 in (120 cm) approx. 32 in (80 cm) approx. 39 in (100 cm) approx. 24 in (60 cm) Minimum distance Center Corners approx. 8 in (20 cm) approx. 6 in (15 cm) When an obstacle is located in this area, all warning displays will light up and a warning tone will sound. If the vehicle moves closer than the minimum distance to an object, the distance may no longer be displayed. i During parking maneuvers, pay special attention to objects located above or below the height of the sensors (e.g. planters or trailer hitches). The Parktronic system will not detect such objects at close range and damage to your vehicle or the object may result. Ultrasonic signals from outside sources (e.g. truck air brakes or jackhammers) may impair the operation of the Parktronic system. 154