Mercedes-Benz GLE COUPE Operator's Manual page 317

If the battery is fully discharged, leave the battery that is being used to jump-start connected for
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a few minutes before attempting to start. This charges the battery slightly.
Make sure that the two vehicles do not touch.
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Make sure that:
The jumper cables are not damaged.
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Bare parts of the terminal clamp do not come into contact with other metal parts while the jumper
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cables are connected to the battery.
The jumper cables cannot come into contact with parts which can move when the engine is
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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 P.
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 0 in the ignition lock and remove it
( page 125).
Y
Switch off all electrical consumers, e.g. rear window defroster, lighting, etc.
X
Open the hood.
X
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
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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, connecting the jumper cable to battery of other vehicle 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-
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itive clamp ; 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.
Jump-starting
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315