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using the jump lead/charging cable. Always
begin with positive contact
2
vehicle rst.
During st
Dur
ing star arting assist
ting assistance:
ance: start the engine of
#
the donor vehicle and run at idle speed.
Connect the negative terminal of the donor
#
battery and earth point
3
of your own vehicle
by using the jump lead/charging cable. Begin
with the donor battery rst.
During st
Dur
ing star arting assist
ting assistance:
ance: start the engine of
#
your own vehicle.
During t
Dur
ing the c
he char
harging pr
ging process:
ocess: start the charg-
#
ing process.
During st
Dur
ing star arting assist
ting assistance:
ance: let the engines run
#
for several minutes.
Dur
During st
ing star arting assist
ting assistance:
ance: before disconnect-
#
ing the jump lead, switch on an electrical con-
sumer on your own vehicle, e.g. the rear win-
dow heater or lighting.
When the starting assistance/charging process is
complete:
First, remove the jump lead/charging cable
#
on your own
from earth point
of the donor battery, then from positive con-
tact
2
and the positive terminal of the donor
battery. Begin each time with the contacts on
your own vehicle rst.
A er removing the jump lead/charging cable,
#
close cover
Further information can be obtained at a quali ed
specialist workshop.
R R eplacing t
eplacing the 12 V batt
he 12 V battery
Observe the notes on the 12 V battery
#
(
page 377).
/
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.
3
and the negative terminal
1
of positive contact 2.
ery
Breakdown assistance 381
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 a eece battery.
Full vehicle functionality is only guaranteed
with a eece battery. For safety reasons,
Mercedes-Benz recommends that you only
use batteries which have been tested and
approved for your vehicle by Mercedes-Benz.
Use detachable parts such as vent hoses,
R
elbow ttings or terminal covers from the bat-
tery which is to be 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.
Otherwise, gases or battery acid could
escape.
Make sure that detachable parts are recon-
R
nected in the same way.
381
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