2009 Mercedes CLK-Class Owner's Manual - Page 352

Practical hints Jump starting ! Jump starting should only be performed using the jump-start terminals located in the engine compartment. Avoid repeated and lengthy starting attempts. Do not attempt to start the engine using a battery quick-charge unit. If the engine does not run after several unsuccessful starting attempts, have it checked at the nearest authorized Mercedes-Benz Center. Excessive unburned fuel generated by repeated failed starting attempts may damage the catalytic converter and may present a fire risk. Make sure the jumper cables do not have loose or missing insulation. Make sure the cable clamps do not touch any other metal part while the other end is still attached to a battery. If the battery is discharged, the engine can be started with jumper cables and the fully charged battery of another vehicle or an equivalent starter pack. Observe the following: RAccess to the battery is not possible on all vehicles. If you cannot access the battery in your vehicle provide jump start power by an external battery or starter pack. RJump X X starting should only be performed when the engine and catalytic converter are cold. not start the engine if the battery is frozen. Let the battery thaw out first. jump start from batteries with the same voltage rating (12 V). Jump starting with a more powerful battery could damage the vehicle's electrical system, which will not be covered by the Mercedes-Benz Limited Warranty. use jumper cables with sufficient cross-section and insulated terminal clamps. make sure the jumper cables are not on or near pulleys, fans or other parts that move when an engine is started or running. the battery be drained completely, let the donating power source charge the vehicle for several minutes before reattempting the starting process. RDo ROnly Make sure the two vehicles do not touch. Turn off all electrical consumers. X Apply the parking brake. X Make sure the automatic transmission is in park position P. X Open the hood. X Flip up cover from positive under hood terminal 2 in front of the filter box. ROnly RAlways RShould 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 The battery is located on the right side of the engine compartment. For jump starting, use the terminals in front of the battery. ! Never invert the terminal connections! 350