2006 Mercedes SLK-Class Owner's Manual - Page 426

Practical hints Jump starting Start the engine of the vehicle with the charged battery and run at idle speed. Connect negative terminal 4 of the charged battery with negative under hood terminal 3 in front of the water tray with the second jumper cable. Clamp the cable to negative terminal 4 of the charged battery first. 1 Positive terminal of charged battery 2 Positive under hood terminal in front of water tray 3 Negative under hood terminal in front of water tray 4 Negative terminal of charged battery Connect positive terminal 1 of the charged battery with positive under hood terminal 2 in front of the water tray with one jumper cable. Clamp the cable to positive terminal 1 of the charged battery 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 3 and 4 and then from positive terminals 2 and 1. You can now turn on the lights. 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 314). Make sure the two vehicles do not touch. Turn off all electrical consumers. Apply parking brake. Shift gear selector lever* to position P (manual transmission to Neutral). Open the hood ( page 307). Flip up cover from positive under hood terminal 2 in front of water tray 1 ( page 422). ! Never invert the terminal connections. i Vehicles with automatic transmission*: Do not tow-start vehicle. 425