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Battery (vehicle)
52
Battery (vehicle)
Important safety notes
Your vehicle is equipped with a 12 V battery and
a high-voltage battery.
For the 12 V battery, observe the notes under
"Battery (vehicle)" in the vehicle Operator's
Manual.
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.
Following an accident, do not touch any high-
voltage components and never modify the
vehicle'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 could ignite. There is a
risk of injury.
In cases of unusual smells developing, smoke
or burn marks, stop the charging process
immediately.
Leave the danger area immediately. Secure
the danger area at a suitable distance.
Contact a qualified specialist workshop.
G
WARNING
If the housing of the high-voltage battery has
been damaged, electrolyte and gases may
leak out. These are poisonous and caustic.
There is a risk of injury.
Avoid contact with skin, eyes or clothing.
Immediately rinse electrolyte splashes off
with water and seek medical attention
straight away.
!
Exhaustive discharge caused by the vehicle
standing idle for lengthy periods can damage
the high-voltage battery. If the vehicle is idle
for lengthy periods leave the high-voltage bat-
tery connected to a charging station.
If the battery charge is sufficient, the high-volt-
age battery can also supply the 12 V battery with
energy. This happens only 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 monitored 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.
Consult a qualified specialist workshop if you
wish to leave your vehicle parked for a long
period of time.
Charging the high-voltage battery
while the vehicle is stationary
G
DANGER
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases is hazardous to health
and can result in poisoning. There is a risk of
fatal injury. Therefore, never leave the engine
running in an enclosed space without ade-
quate ventilation.
!
Only charge the high-voltage battery in the
"Charging when stationary" mode. Do not
connect any battery chargers to the high-volt-
age battery. This could damage the vehicle's
high-voltage electrical system.
Bring the vehicle to a stop with the engine
X
running.
The engine powers the electric motor. The
electric motor operates as an alternator. The
high-voltage battery is being charged.
If the high-voltage battery has been discharged
excessively, charge the high-voltage battery to
at least 60%. In the "Charging when stationary"
operating mode, you can observe the condition
of charge of the high-voltage battery up to a
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