2003 Mercedes ML-Class Owner's Manual - Page 264

Practical hints Jump starting Jump starting Warning! If the battery is discharged, the engine can be started with jumper cables and the battery of another vehicle. Observe the following: Jump starting should only be performed when the engine and catalytic converter are cold. Do not start the engine if the battery is frozen. Let the battery thaw out first. Only jump start from batteries with the same voltage rating (12V). 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 only jumper cables with sufficientcross-section, insulated terminal clamps and polarity reversal protection. G i Jumper cables with polarity reversal protection are available at any authorized Mercedes-Benz Light Truck Center. Failure to follow these directions will cause damage to the electronic components, and can lead to a battery explosion and severe injury or death. Never lean over batteries while connecting or jump starting, you might get injured. Battery fluid contains sulfuric acid. Do not allow this fluid to come in contact with eyes, skin or clothing. In case it does, immediately flush affected area with water, and seek medical help if necessary. A battery will also produce hydrogen gas, which is flammable and very explosive. Keep flames or sparks away from battery, avoid improper connection of jumper cables, smoking etc. Attempting to jump start a frozen battery can result in it exploding, causing personal injury. Read all instructions before proceeding. 264