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using the jump lead/charging cable. Always
begin with positive contact
vehicle first.
During starting assistance: start the engine of
#
the donor vehicle and run at idle speed.
Connect the negative terminal of the donor
#
battery and earth point
3
by using the jump lead/charging cable. Begin
with the donor battery first.
During starting assistance: start the engine of
#
your own vehicle.
During the charging process: start the charg-
#
ing process.
During starting assistance: let the engines run
#
for several minutes.
During starting assistance: 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
#
2
on your own
from earth point
of the donor battery, then from positive con-
tact
2
battery. Begin each time with the contacts on
your own vehicle first.
After removing the jump lead/charging cable,
#
of your own vehicle
close cover
Further information can be obtained at a qualified
specialist workshop.
Replacing the 12 V battery
Observe the notes on the 12 V battery
#
(
page 381).
/
Mercedes-Benz recommends that you have the
12 V battery replaced at a qualified specialist
workshop, e.g. at a Mercedes-Benz Service
Centre.
3
and the negative terminal
and the positive terminal of the donor
1
of positive contact 2.
Breakdown assistance 385
Observe the following notes if you want to replace
the battery yourself:
Always replace a faulty battery with a battery
R
which meets the specific vehicle require-
ments.
The vehicle is equipped with a fleece battery.
Full vehicle functionality is only guaranteed
with a fleece 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 fittings 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.
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