Battery acid is caustic. Avoid contact
with the skin, eyes or clothing.
Wear suitable protective clothing, in
particular gloves, an apron and a
face mask.
Immediately rinse acid splashes off
with clean water. Consult a doctor if
necessary.
Wear eye protection.
Keep children away.
Observe this Owner's Manual.
For safety reasons, Mercedes-Benz recom-
mends that you only use batteries which have
been tested and approved for your vehicle by
Mercedes-Benz. These batteries provide
increased impact protection to prevent vehicle
occupants from suffering acid burns should the
battery be damaged in the event of an accident.
In order for the battery to achieve the maximum
possible service life, it must always be suffi-
ciently charged.
Like other batteries, the vehicle battery may
discharge over time if you do not use the vehicle.
In such cases, have the battery disconnected at
a qualified specialist workshop. You can also
charge the battery with a charger recommended
by Mercedes-Benz. For more information,
please contact a qualified specialist workshop.
Have the battery charge checked more fre-
quently if you use the vehicle mainly for short
trips or if you leave it standing idle for a lengthy
period. Consult a qualified specialist workshop
if you wish to leave your vehicle parked up for a
long period of time.
When you park the vehicle, remove the key if you
do not require any electrical consumers. The
vehicle will then use very little energy, thus con-
serving battery power.
PLUG-IN HYBRID vehicles: if the battery
charge is sufficient, the high-voltage battery can
also supply the 12 V battery. This only happens
if the battery charge of the 12 V battery requires
this, e.g. after using electrical consumers for an
extended period with the engine switched off.
As the on-board voltage is continuously moni-
tored this can also be performed when the
engine is switched off. The battery charge of the
12 V battery and the on-board voltage are
thereby kept stable for longer.
If the power supply has been interrupted, e.g. if
the battery was discharged, you will have to:
R
set the clock. Information on setting the clock
can be found in the Digital Owner's Manual.
On vehicles with a multimedia system and
navigation system, the clock is set automati-
cally.
R
reset the function for folding the exterior mir-
rors in/out automatically, by folding the mir-
rors out once (
Y
page 118).
High-voltage battery - important
safety notes
Only PLUG-IN HYBRID vehicles are equipped
with a high-voltage battery.
G
DANGER
The vehicle's high voltage electrical system is
under high voltage. If you modify components
in the vehicle's high-voltage electrical system
or touch damaged components, you may be
electrocuted. The components in the vehi-
cle's high-voltage electrical system may be
damaged in an accident, although the damage
is not visible. There is a risk of fatal injury.
Do not touch any high-voltage components
after an accident and never modify the vehi-
cle's high-voltage electrical system. Have the
vehicle towed away after an accident and the
vehicle's high-voltage electrical system
checked by a qualified specialist workshop.
G
WARNING
In the event of a vehicle fire, the internal pres-
sure of the high-voltage battery could exceed
a critical value. In this case, flammable gas
escapes through a vent valve in the vehicle's
underbody. The gas can ignite. There is a risk
of injury.
Leave the danger area immediately. Secure
the danger area at a suitable distance, whilst
observing legal requirements.
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Battery (vehicle)
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