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Vehicle battery
Maintenance
The battery is maintenance-free, i.e., the elec‐
trolyte will last for the life of the battery in tem‐
perate climate conditions.
The service center will be happy to answer any
questions on the battery.
Battery replacement
Use approved vehicle batteries
Only use vehicle batteries that have been
approved for your vehicle by the manufacturer;
otherwise, the vehicle could be damaged and
systems or functions may not be fully availa‐
ble.◀
Have the vehicle battery registered by the serv‐
ice center after it is replaced to ensure that all
comfort functions are available without restric‐
tions and that any associated Check Control
messages are no longer displayed.
Charging the battery
Note
Do not connect the charger to the socket
Do not connect the battery charger to the
socket installed in the vehicle at the factory as
this could damage the battery.◀
Only charge the battery in the vehicle when the
engine is switched off. Connections, refer to
page 248.
General information
Ensure that the battery is sufficiently charged to
achieve the full battery life.
It may be necessary to charge the battery in
the following cases:
▷ When the vehicle is frequently used to
travel short distances.
▷ When the vehicle has not been driven for
more than one month.
Power failure
After a temporary power failure, some equip‐
ment will be restricted in its use and will need
to be reinitialized. In addition, certain individual
settings will be lost and must be updated:
▷ Time and date: the values must be up‐
dated, refer to page 72.
▷ Radio: the stations need to be stored again,
refer to page 159.
▷ Onboard monitor: full functionality will be
restored after some time.
▷ Glass sunroof, electrical: it may only be pos‐
sible to tilt the roof. The system needs to be
initialized. Contact the service center.
Indicator/warning lamps
Lights up red: the vehicle battery is no
longer being charged. Alternator mal‐
function.
Switch off all unnecessary electrical consumers.
Have the battery checked immediately.
Lights up yellow: the battery charge
level is very low, the battery is old, or it
is not securely connected.
Charge the battery by taking a long drive or us‐
ing an external charger. If the indicators appear
again, have the battery checked as soon as
possible.
Disposing of old batteries
Have used batteries disposed of by the
service center after they are replaced or
take them to a recycling center.
Maintain the battery in an upright position for
transport and storage. Secure the battery so
that it does not tip over during transport.
Seite 246
Mobility
Replacing components
246
Online Edition for Part no. 01 40 2 911 544 - VI/13
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