2005 Mercedes G-Class Owner's Manual - Page 355

Practical hints Jump starting Warning! G Connect the positive terminals 2 of the batteries with the jumper cable. Clamp cable to charged battery first. Start engine of the vehicle with the charged battery and run at idle speed. Connect negative terminals 3 of the batteries with the jumper cable. Clamp cable to charged battery first. 1 Cover 2 Positive (+) terminal 3 Negative (-) terminal Open cover 1 of the positive terminal of both vehicles. Start the engine of the disabled vehicle. 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. You can now turn on the lights. Have the battery checked at the nearest authorized Mercedes-Benz Light Truck Center. Keep flames or sparks away from battery. Do not smoke. Observe all safety instructions and precautions when handling automotive batteries ( page 351). The jump-start contacts are located in the engine compartment. Make sure the two vehicles do not touch. Turn off all electrical consumers. Apply parking brake. Shift gear selector lever to position P. 355