2010 Mercedes ML-Class Owner's Manual - Page 339

Jump starting damage the catalytic converter31 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 337 with a more powerful battery could damage the vehicle's electrical system. Such damage will not be covered by the Mercedes-Benz Limited Warranty. ROnly 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. RAlways to the battery is not possible on all vehicles. If you cannot access the battery of the other vehicle, provide jump start power by an external battery or starter pack. starting should only be performed when the engine and catalytic converter32 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 RJump RDo ROnly The jump-start contacts are located in the engine compartment on the passenger side. X Make sure the two vehicles do not touch. X Switch off all electrical consumers. X Engage the parking brake. X Make sure the automatic transmission is in park position P. X Open the hood (Y page 213). 31 Vehicles 32 Vehicles with gasoline engine only. with gasoline engine only. Z Practical hints RShould the battery be drained completely, let the donating power source charge the vehicle for several minutes before reattempting the starting process.