Mercedes-Benz S-Class 2014 Owners Manual - Manual (Page 377)

Position number D identifies the charged battery of the other vehicle or an equivalent jump-
starting device.
X 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
using the jumper cable. Always begin with positive terminal = on your own vehicle first.
X
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
the jumper cable, connecting the jumper cable to donor battery D first.
X 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
positive clamp = and positive terminal ?. Begin each time at the contacts on your own
vehicle first.
X 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
precisely beneath the corresponding recesses in the cover.
X Press fasteners : into the mountings until they engage.
X Have the battery checked at a qualified specialist workshop.
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
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Breakdown
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