2020 MERCEDES-BENZ S-CLASS SALOON LONG light

dashboard warning lights MPG navigation tow bar battery wiring diagram

Page 376 of 609

MERCEDES-BENZ S-CLASS SALOON LONG 2020 Owners Manual using
the jump lead. Start with the donor
ve hicle firs t. #
Start the engine of your ow nve hicle. #
Let the engines runfo r se veral minutes. #
Before disconnecting the jump leads, switch
on an elec

using
the jump lead. Start with the donor
ve hicle firs t. #
Start the engine of your ow nve hicle. #
Let the engines runfo r se veral minutes. #
Before disconnecting the jump leads, switch
on an electrical consumer in your ow nve hi‐
cle, e.g. there ar wind owheater or the light‐
ing.
When starting assistance has finished: #
Firstremo vethe jump lead from the ear th
point of your ow nve hicle and the negative
te rm inal of the donor batter y,then remo ve
th e jump lead from the positive conta cts of
bo th vehicles. Alw aysst art with your own
ve hicle firs t. #
Close pr otective co ver2 of positive contact
3 and close co ver1.
Fu rther information can be obtained at a quali‐
fi ed specialist workshop. Charging
the12 V battery #
Connect the positive conta cts oftheve hicle
and thech arge r with thech arging cable.
St art with theve hicle firs t. #
Connect the negative conta ct ofthech arger
and ear thpoint 4ontheve hicle with the
ch arging cable. Start with thech arge rfirs t. #
Start thech arging process.
When thech arging process is comple te: #
Remo vethech arging cable from ear thpoint
4 ontheve hicle and the negative conta ct
of thech arge rfirs t and then from the posi‐
tive conta cts ontheve hicle and charge r.
Alw aysst art with theve hicle firs t. #
Close pr otective co ver2 of positive contact
3 and close co ver1. Re
placing the 12V battery #
Obser vethe no tes on the12 V battery
(/ page 368).
Mercedes-Benz recommends that you ha vethe
12 V battery replaced at a qualified specialist wo
rkshop, e.g. at a Mercedes-Benz Service
Centre.
Obser vethefo llowing no tes if youwa ntto
re place the battery yourself:
R Alw aysre place a faulty bat tery with a battery
which meets the specific vehicle require‐
ments.
The vehicle is equipped with an AGMtech nol‐
ogy battery (Absorbent Glass Mat) or a li th‐
ium-ion batter y.Fu llve hicle functionality is
only guaranteed with an AGM battery or lith‐
ium-ion batter y.Fo r saf etyre asons,
Mercedes-Benz recommends that you on ly
use bat teries which ha vebeen tested and
appr ovedfo ryo ur vehicle byMercedes-Benz.
R Carryove r de tach able parts, such as vent
hoses, elbow fittings or term inal co vers from
th e battery being replaced.
R Make sure that theve nt hose is al ways con‐
nected tothe original opening on the side of
th e batter y.
Fit any existing or supplied cell caps.
Otherwise, gases or battery acid could
escape. Breakdown assis
tance 373