BMW 3 Series Owner's Manual page 275

Mobility
When mounting new tires or changing over
from summer to winter tires and vice versa,
mount run-flat tires for your own safety. In the
event of a flat, no spare wheel is available. Your
BMW center will be glad to advise you. Refer
also to New wheels and tires, page 252.
The tools for changing wheels are avail-
able as optional accessories from your
BMW center.<
Jack mounting points
The jacking points are at the positions shown in
the illustration.
Vehicle battery
Battery care
The battery is 100% maintenance-free, the
electrolyte will last for the life of the battery
when the vehicle is operated in a temperate
climate. Your BMW center will be glad to advise
in all matters concerning the battery.
Battery replacing
Only use vehicle batteries that have been
approved for your vehicle by the manu-
facturer; otherwise, the vehicle could be dam-
aged and systems or functions may not be fully
available.<
After a battery replacement, have the battery
registered on the vehicle by your service center
to ensure that all comfort functions are fully
available.
270
Replacing components
Online Edition for Part no. 01402911383 - © 06/13 BMW AG
Charging the battery
Note
Do not connect battery chargers to the
sockets installed in the vehicle at the
factory; otherwise you may cause damage to
the battery.<
General information
To guarantee the full service life of the battery,
ensure that the battery is always properly
charged.
It may be necessary to charge the battery in the
following situations:
> If frequent short trips are taken;
> If the vehicle is frequently parked for more
than a month.
Jump-starting terminals
Only charge the battery in the vehicle via the
terminals in the engine compartment with the
engine off. Connections, refer to Jump starting
on page 274.
Power failure
After a temporary power loss, the functioning of
some equipment may be limited and require
reinitialization. Individual settings may likewise
have been lost and will have to be programmed:
>
Time and date
These values must be updated, refer to
page 90.
> Radio
In some cases, stations may have to be
stored again, refer to page 170.
> Navigation system
You must wait until the system becomes
functional again.
>
Glass roof
It may happen that the roof can only be
tilted. The system must be initialized.
Please contact your BMW center.