Mercedes-Benz S-Class Maybach Owner's Manual page 381

378 Breakdown assistance
378
the jump lead. Start with the donor vehicle
rst.
Start the engine of your own vehicle.
#
Let the engines run for several minutes.
#
Before disconnecting the jump leads, switch
#
on an electrical consumer in your own vehicle,
e.g. the rear window heater or the lighting.
When starting assistance has nished:
First, remove the jump lead from the earth
#
point of your own vehicle and the negative ter-
minal of the donor battery, then remove the
jump lead from the POSITIVE contacts of both
vehicles. Always start with your own vehicle
rst.
Close protective cover 2 of POSITIVE con-
#
tact 3 and close cover 1.
Further information can be obtained at a quali ed
specialist workshop.
Charging t Char ging the 12 V batt he 12 V battery ery
Connect the POSITIVE contacts of the vehicle
#
and the charger with the charging cable. Start
with the vehicle rst.
Connect the NEGATIVE contact of the charger
#
and earth point 4 on the vehicle with the
charging cable. Start with the charger rst.
Start the charging process.
#
When the charging process is complete:
Remove the charging cable from earth point
#
4 on the vehicle and the NEGATIVE contact
of the charger rst and then from the POSI-
TIVE contacts on the vehicle and charger.
Always start with the vehicle rst.
Close protective cover 2 of POSITIVE con-
#
tact 3 and close cover 1.
R R eplacing t eplacing the 12 V batt he 12 V battery ery
Observe the notes on the 12 V battery
#
( page 373).
/
Mercedes-Benz recommends that you have the
12 V battery replaced at a quali ed specialist
workshop, e.g. at a Mercedes-Benz Service
Centre.
Observe the following notes if you want to replace
the battery yourself:
Always replace a faulty battery with a battery
R
which meets the speci c 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.
Carry over detachable parts, such as vent
R
hoses, elbow ttings or terminal covers from
the battery being replaced.
Make sure that the vent hose is always con-
R
nected to the original opening on the side of
the battery.
Fit any existing or supplied cell caps.