BMW 3 Series Owner's Manual page 361

sages displayed which relate to comfort features
will disappear.
Charging the battery
General information
Make sure that the battery is always sufficiently
charged to guarantee that the battery remains
usable for its full service life.
A discharged battery is indicated by a red
indicator light.
Charge the battery when acceleration is insuffi‐
cient.
The following circumstances can have a negative
effect on the performance of the battery:
▷ Frequent short-distance drives.
▷ The vehicle is not used for more than a
month.
Safety information
NOTICE
Battery chargers that charge the vehicle battery
via sockets or cigarette lighters in the vehicle
may overload or damage the 12 V electrical
system. There is a risk of damage to property,
among other potential damage. Only connect
battery chargers for the vehicle battery to the
starting aid terminals in the engine compart‐
ment.
Charging the battery
Charge the battery only when the engine is off
and via the starting aid terminals in the engine
compartment.
With Mild Hybrid technology: charge the battery
only when the hood is opened.
Additional information:
Starting aid terminals, refer to page 367.
Replacing components
Online Edition for Part no. 01405A38F56 - VI/21
Power interruption
After a power interruption, some equipment
needs to be newly initialized or individual settings
updated, for example:
▷ With Memory function: store the positions
again.
▷ Time: update.
▷ Date: update.
▷ Glass sunroof: initialize the system.
Mild Hybrid technology
Principle
Part of the Mild Hybrid technology is a battery
that works with a voltage of 48 volts. Mild Hybrid
technology can lower the fuel consumption.
Mild Hybrid technology influences the following
functions.
Additional information:
▷ Auto Start/Stop function, refer to page 130.
▷ Engine-Off Coasting, refer to page 311.
Safety information
DANGER
Contact with live components can lead to an
electric shock. There is a risk of injury or danger
to life. Do not touch any components that are
under voltage.
MOBILITY
361