2003 Mercedes G-Class Owner's Manual - Page 298

Practical hints Jump starting Now you can again turn on the electrical consumers. Do not turn on the lights under any circumstances. Remove the jumper cables first from negative terminals 3 of the batteries and then from positive terminals 2. Have the battery checked at the nearest authorized Mercedes-Benz Light Truck Center. 1 Cover 2 Positive (+) terminal 3 Negative (-) terminal Open cover 1 of the positive terminal of both vehicles. Connect the positive terminals 2 of the batteries with the jumper cable. Clamp cable to discharged battery first. Connect negative terminals 3 of the batteries with the jumper cable. Clamp cable to charged battery first. Start the engine of the disabled vehicle. Warning! G Keep flames or sparks away from battery. Do not smoke. Observe all safety instructions and precautions when handling automotive batteries ( page 295). The jump-start contacts are located in the engine compartment. Make sure that the two vehicles do not touch. Turn off all electrical consumers. Apply parking brake. Shift selector lever to position P. Start engine of the vehicle with the charged battery and run at idle speed. 298