Replacing the 12 V battery
#
Observe the notes on the 12 V battery
(/ page 425).
Mercedes-Benz recommends that you have the
12 V battery replaced at a qualied 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
that meets the specic vehicle requirements.
The vehicle is equipped with a battery using
AGM (Absorbent Glass Mat) technology or a
lithium-ion battery. Full vehicle functionality is
guaranteed only with an AGM battery or lith-
ium-ion battery. For safety reasons, Mercedes-
Benz recommends that you use only batteries
that have been tested and approved for your
vehicle by Mercedes-Benz.
R
Carry over detachable parts, such as vent
hoses, elbow tting 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.
R
Make sure that detachable parts are recon-
nected in the same way.
Tow starting or towing away
Permitted towing methods (not plug-in hybrid)
*
NOTE Damage from automatic braking
If one of the following functions is activated,
the vehicle will brake automatically in certain
situations:
R
Active Brake Assist
R
Active Distance Assist DISTRONIC
R
HOLD function
R
Active Parking Assist
To avoid damage to the vehicle, deactivate
these systems in the following or similar situa-
tions:
#
During towing.
#
In a car wash.
Mercedes-Benz recommends transporting your
vehicle in the case of a breakdown, rather than
towing it away.
For towing with both axles on the ground, use a
tow rope or tow rod. Do not use tow bar systems
(/ page 320).
*
NOTE Damage to the vehicle due to tow-
ing away incorrectly
#
Observe the instructions and notes on
towing away.
Towing with a raised axle: towing should be per-
formed by a towing company.
432
Breakdown assistance
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