Mercedes-Benz S-Class, Operator'S Manual

Page: 351 / 586

using the jumper cable. Start with the donor
vehicle first.
#
Start the engine of your own vehicle.
#
Let the engines run for several minutes.
#
Before disconnecting the jumper cables,
switch on an electrical consumer in your own
vehicle, e.g. the rear window heater or the
lighting.
When starting assistance has finished:
#
First remove the jumper cable from the
ground point of your own vehicle and the
negative terminal of the donor battery, then
remove the jumper cable from the positive
contacts of both vehicles. Always start with
your own vehicle first.
#
Close protective cover 2 of positive contact
3 and close cover 1 .
Further information can be obtained at a quali‐
fied specialist workshop.
Charging the 12 V battery
#
Connect the positive contacts of the vehicle
and the charger with the charging cable.
Start with the vehicle first.
#
Connect the negative contact of the charger
and ground point 4 on the vehicle with the
charging cable. Start with the charger first.
#
Start the charging process.
When the charging process is complete:
#
Remove the charging cable from ground
point 4 on the vehicle and the negative con‐
tact of the charger first and then from the
positive contacts on the vehicle and charger.
Always start with the vehicle first.
#
Close protective cover 2 of positive contact
3 and close cover 1 .
Replacing the 12 V battery
#
Observe the notes on the 12 V battery
(
/
page 344).
Mercedes-Benz recommends that you have the
12 V battery replaced at a qualified specialist
workshop, e.g. at an authorized Mercedes-Benz
Center.
Observe the following notes if you want to
replace the battery yourself:
R
Always replace a faulty battery with a battery
which meets the specific vehicle require‐
ments.
The vehicle is equipped with an AGM technol‐
ogy battery (Absorbent Glass Mat) or a lith‐
ium-ion battery. Full vehicle functionality is
only guaranteed with an AGM battery or lith‐
ium-ion battery. For safety reasons,
Mercedes-Benz recommends that you only
use batteries which have been tested and
approved for your vehicle by Mercedes-Benz.
R
Carry over detachable parts, such as vent
hoses, elbow fitting or terminal covers from
the battery being replaced.
R
Make sure that the vent hose is always con‐
nected to the original opening on the side of
the battery.
Install any existing or supplied cell caps.
Otherwise, gases or battery acid could
escape.
Breakdown assistance 349