Mercedes-Benz S-Class Coupe Operator's Manual page 316

Jump-starting
314
Make sure that:
the jumper cables are not damaged.
R
when the jumper cables are connected to the battery, uninsulated sections of the terminal clamp
R
do not come into contact with other metal sections.
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 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 136).
Y
Switch off all electrical consumers, e.g. rear window defroster, lighting, etc.
X
Open the hood.
X
Example: ground point cover
Turn fasteners : one Õ turn and remove.
X
Remove the cover while pressing down on cap ; of the washer fluid reservoir.
X
Position number D identifies the charged battery of the other vehicle or an equivalent jump-starting
device.