2003 Mercedes G-Class Owner's Manual - Page 167

Controls in detail Driving systems Warning indicator Visual signals indicate to the driver the relative distance between the sensors and an obstacle. The warning indicator is located next to the tailgate. An intermittent acoustic warning will sound as the fourth segment lights up and a constant acoustic warning lasting a maximum of three seconds will sound for the sixth segment. Rear Park Assist malfunction There is a malfunction in the Rear Park Assist system if: a low warning tone sounds while the vehicle is reversing The Rear Park Assist sensors are dirty or malfunctioning. Warning indicator no segments light up and no warning sounds The Rear Park Assist is malfunctioning. Have the Rear Park Assist system checked by an authorized Mercedes-Benz Light Truck Center as soon as possible. Malfunction may also be caused by interference from other radio or ultrasonic signals. Check the Rear Park Assist operation at another location to rule out interference from outside radio or ultrasonic signals. Clean the Rear Park Assist system sensors ( page 234). Switch on the ignition again. As your vehicle approaches an object, one or more segments will light up, depending on the distance. When the sixth segment lights, you have reached the minimum distance. 167