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First, remove the jumper cable/charging
cable from ground point 3 and the negative
pole of the donor battery, then from positive
clamp 2 and the positive pole of the donor
battery. Begin each time with the contacts
on your own vehicle first.
#
After removing the jumper cable/charging
cable, close cover 1 of positive clamp 2.
Further information can be obtained at a quali‐
fied specialist workshop.
Replacing the 12 V battery
#
Observe the notes on the 12 V battery
(/ page 302).
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:
R
Always replace a faulty battery with a battery
which meets the specific 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.
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Carry over detachable parts, such as vent
hoses, elbow fitting or terminal covers from
the battery being replaced.
R
Make sure that the vent hose is always con‐
nected to the original opening on the side of
the battery.
Install any existing or supplied cell caps.
Otherwise, gases or battery acid could
escape.
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Make sure that detachable parts are recon‐
nected in the same way.
Tow starting or towing away
Permitted towing methods
Plug-in hybrid: be sure to observe the notes in
the Supplement. You could otherwise fail to rec‐
ognize dangers.
*
NOTE Damage from automatic braking
If one of the following functions is switched
on, the vehicle brakes automatically in cer‐
tain situations:
R
Active Brake Assist
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Active Distance Assist DISTRONIC
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HOLD function
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Active Parking Assist
To avoid damage to the vehicle, deactivate
these systems in the following or similar sit‐
uations:
#
During towing
#
In a car wash
Breakdown assistance
307