Mercedes-Benz GL-Class 2013 Owners Manual - Manual (Page 394)

Do not start the vehicle using a rapid charging device. If your vehicle's battery is discharged,
the engine can be jump-started from another vehicle or from a second battery using jumper
cables. Observe the following points:
R The battery is not accessible in all vehicles. If the other vehicle's battery is not accessible,
jump-start the vehicle using a second battery or a jump-starting device.
R You may only jump-start the vehicle when the engine and exhaust system are cold.
R Do not start the engine if the battery is frozen. Let the battery thaw first.
R Only jump-start from batteries with a 12 V voltage rating.
R Only use jumper cables which have a sufficient cross-section and insulated terminal clamps.
R If the battery is fully discharged, leave the battery that is being used to jump-start connected
for a few minutes before attempting to start. This charges the battery slightly.
R Make sure that the two vehicles do not touch.
Make sure that:
R the jumper cables are not damaged.
R when the jumper cables are connected to the battery, uninsulated sections of the terminal
clamp do not come into contact with other metal sections.
R the jumper cables cannot come into contact with parts such as the V-belt pulley or the fan.
These parts move when the engine is started and while it is running.
X Secure the vehicle by applying the electric parking brake.
X
Shift the transmission to position P.
X Turn the SmartKey to position 0 in the ignition lock and remove it (
Y
page 163). On vehicles
with KEYLESS-GO, make sure the ignition is switched off (
Y
page 163). All indicator lamps
in the instrument cluster must be off.
X Switch off all electrical consumers (e.g. radio, blower, etc.).
X Open the hood (
Y
page 366).
Position number B identifies the charged battery of the other vehicle or an equivalent jump-
starting device.
392
Jump-starting
Breakdown
assistance