2006 Mercedes SL-Class Owner's Manual - Page 421

Practical hints Jump starting Start the engine of the vehicle with the charged battery and run at idle speed. Connect negative terminals 1 and 2 of the batteries with the jumper cables. Clamp cable to charged battery 1 first. Start the engine of the disabled vehicle. 1 Negative terminal of charged battery 2 Negative terminal of discharged battery 3 Positive terminal of discharged battery 4 Positive terminal of charged battery Connect positive terminals 3 and 4 of the batteries with the jumper cables. Clamp cable to charged battery 4 first. 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 1 and then from positive terminals 3 and 4. You can now turn on the lights. Have the battery checked at the nearest 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 279). The starter battery is located on the right side of the engine compartment. Make sure the two vehicles do not touch. Turn off all electrical consumers. Apply the parking brake ( page 59). Shift gear selector lever to position P. Open the hood ( page 272). Remove the red cover from positive terminal on both vehicles ( page 413). ! Never invert the terminal connections. ! Do not tow-start the vehicle. 420