2007 Mercedes CLS-Class Owner's Manual - Page 425

Practical hints Jump starting The main battery is located in the trunk underneath the luggage box ( page 395). Only jump start the vehicle from the battery in the trunk. Make sure the two vehicles do not touch. Turn off all electrical consumers. Apply parking brake ( page 59). Make sure the gear selector lever is set to position P. Open the trunk. 1 Positive terminal of discharged battery 2 Negative terminal of discharged battery 3 Positive terminal of charged battery 4 Negative terminal of charged battery Connect positive terminals 1 and 3 of the batteries with the jumper cable. Clamp cable to charged battery 3 first. Connect negative terminals 4 and 2 of the batteries with the jumper cable. Clamp cable to charged battery 4 first. Start the engine of the disabled vehicle. You can now turn on the electrical consumers. Do not switch on the headlamps under any circumstances. Remove the jumper cables first from negative terminals 2 and 4 and then from positive terminals 1 and 3. You can now switch on the headlamps. Have the battery checked at the nearest authorized Mercedes-Benz Center. ! Never invert the terminal connections! Start engine of the vehicle with the charged battery and run at idle speed. 424