2003 Mercedes CLK-Class Owner's Manual - Page 333

Practical hints Jump starting Connect the negative terminal 4 of the charged battery with the under hood terminal 3 in front of the discharged battery with the jumper cable. Clamp cable to charged battery 4 first. 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 the negative terminals 3 and 4 and then from the positive terminals 1 and 2. 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 258). The battery is located in the engine compartment on the right hand side. For jump starting use the terminals in front of the battery. Make sure that the two vehicles do not touch. Turn off all electrical consumers. Apply parking brake. Shift selector lever to position P. 1 Positive terminal of charged battery 2 Positive under hood terminal in front of discharged battery 3 Negative under hood terminal in front of discharged battery 4 Negative terminal of charged battery Connect the positive terminal 1 of the charged battery with the under hood terminal 2 in front of the discharged battery with the jumper cable. Clamp cable to charged battery 1 first. Let the engine of the assisting vehicle run at idle speed. i The vehicle cannot be started via tow-start. 333