2003 Mercedes SL-Class Owner's Manual - Page 324

Practical hints Jump starting Connect the negative terminals 1 and 2 of the batteries with the jumper cables. Start with the charged battery. 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. 1 Negative terminal of charged battery 2 Negative terminal of discharged battery 3 Positive terminal of discharged battery 4 Positive terminal of charged battery Remove the red cover from positive terminal on both vehicles ( page 319). Connect the positive terminals 3 and 4 of the batteries with the jumper cables. Start with the charged battery. Start the engine of the vehicle with the charged battery and run at idle speed. Remove the jumper cables first from the negative terminals 1 and 2 of the batteries and then from the positive terminals 3 and 4. Have the battery checked at the nearest Mercedes-Benz Center. Warning! G Never lean over the battery while connecting or jump starting. Warning! G Keep flames or sparks away from battery. Do not smoke. Observe all safety instructions and precautions when handling automotive batteries ( page 232). The starter battery is located in the engine compartment. Make sure that the two vehicles do not touch. Turn off the engine. Turn off all electrical consumers. Apply parking brake. Shift selector lever to position P. i The vehicle cannot be started via tow-start. 324