Mercedes-Benz S-Class Operator's Manual page 377

Position number D identifies the charged battery of the other vehicle or an equivalent jump-
starting device.
Slide cover C of positive terminal = in the direction of the arrow.
X
Connect positive terminal = on your vehicle to positive terminal ? of donor battery D
X
using the 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 A of donor battery D to earth point B of your vehicle using
X
the jumper cable, connecting the jumper cable to donor battery D first.
Start the engine.
X
Before disconnecting the jumper cables, let the engine run for several minutes.
X
First, remove the jumper cables from earth point B and negative terminal A, then from
X
positive clamp = and positive terminal ?. Begin each time at the contacts on your own
vehicle first.
Close cover C of positive clamp = after removing the jumper cables.
X
Replace the earth point cover. Make sure all mountings for the fasteners are positioned
X
precisely beneath the corresponding recesses in the cover.
Press fasteners : into the mountings until they engage.
X
Have the battery checked at a qualified specialist workshop.
X
i
Jump-starting is not considered to be a normal operating condition.
i
Jumper cables and further information regarding jump-starting can be obtained at any
qualified specialist workshop.
Jump-starting
Z
375