Mercedes-Benz GLB 2023 Operator's Manual page 311

Slide cover 1 of positive contact
#
jump-starting connection point in the direction
of the arrow.
Connect positive contact 2 on your vehicle
#
to the positive terminal of the donor battery
using the jumper cable/charging cable.
Always begin with positive contact
own vehicle first.
During starting assistance: start the engine of
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the donor vehicle and run it at idle speed.
Connect the negative terminal of the donor
#
battery and ground point
cle using the jumper cable/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 jumper cable, switch on an electrical
consumer in your own vehicle, e.g. the rear
2 on the
window defroster or lighting.
When the starting assistance/charging process is
complete:
First, remove the jumper cables/charging
#
cables from ground point
2 on your
terminal of the donor battery, then from posi-
tive contact 2 and the positive terminal of
the donor battery. Begin each time with the
contacts on your own vehicle first.
After removing the jumper cables/charging
#
3 of your own vehi- cables, 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
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( page 305).
/
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:
Always replace a faulty battery with a battery
R
that meets the specific vehicle requirements.
The vehicle is equipped with a fleece battery.
3
and the negative
Full vehicle functionality is only guaranteed
with a fleece battery. For safety reasons,
Mercedes-Benz recommends that you only
Breakdown assistance 309
1 of positive contact 2.