Mercedes-Benz GLS Operator's Manual page 350

Jump-starting
348
Make sure that:
The jumper cables are not damaged.
R
Bare parts of the terminal clamp do not come into contact with other metal parts while the jumper
R
cables are connected to the battery.
The jumper cables cannot come into contact with parts which can move when the engine is
R
running, such as the V-belt pulley or the fan.
Secure the vehicle by applying the electric parking brake.
X
Shift the transmission to position j.
X
Make sure that the ignition is switched off. All indicator lamps in the instrument cluster must be
X
off. When using the SmartKey, turn the SmartKey to position u in the ignition lock and remove it
( page 140).
Y
Switch off all electrical consumers, e.g. rear window defroster, lighting, etc.
X
Open the hood.
X
i
Right-hand-drive vehicle: the jump-starting connection points may be located on the other
side of the vehicle.
Position number B identifies the charged battery of the other vehicle or an equivalent jump-starting
device.
Slide cover : of positive terminal ; in the direction of the arrow.
X
Connect positive terminal ; on your vehicle to positive terminal = of donor battery B using the
X
jumper cable, always begin with positive terminal ; on your own vehicle first.
Start the engine of the donor vehicle and run it at idling speed.
X
Connect negative terminal ? of donor battery B to ground point A of your vehicle using the
X
jumper cable, beginning with donor battery B first.
Start the engine.
X
Before disconnecting the jumper cables, let the engine run for several minutes.
X
First, remove the jumper cables from ground point A and negative terminal ?, then from pos-
X
itive terminal ; and positive terminal =. Begin each time at the contacts on your own vehicle
first.
Close cover : of positive terminal ; after removing the jumper cables.
X
Have the battery checked at a qualified specialist workshop.
X
Jump-starting is not considered to be a normal operating condition.