2003 Mercedes CL-Class Owner's Manual - Page 317

Practical hints Jump starting Connect negative terminals 2 and 4 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 turn on the lights 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 turn on the lights. 1 Positive terminal of discharged battery 2 Negative terminal of discharged battery 3 Positive terminal of charged battery 4 Negative terminal of charged battery Have the battery checked at the nearest authorized Mercedes-Benz Center. Warning! G Keep flames or sparks away from battery. Do not smoke. Observe all safety instructions and precautions when handling automotive batteries ( page 243). The battery is located on the right side of the trunk under the battery cover ( page 313). Make sure that the two vehicles do not touch. Turn off all electrical consumers. Apply parking brake. Shift gear selector lever to position P. Open the trunk lid. Remove battery cover. Connect positive terminals 1 and 3 of the batteries with the jumper cable. Clamp cable to charged battery 3 first. ! Do not tow-start the vehicle. ! Never invert the terminal connections. Start engine of the vehicle with the charged battery and run at idle speed. 317