BMW M4 COUPE Owner's Handbook Manual page 234

Mobility
More information regarding the battery can be
obtained from a Service Partner of the manu‐
facturer or another qualified Service Partner or
a specialist workshop.
Replacing the vehicle battery
General
The manufacturer of your vehicle recommends
having a Service Partner of the manufacturer
or another qualified Service Partner or a spe‐
cialist workshop register the vehicle battery to
the vehicle after the battery has been replaced.
Once the battery has been registered again, all
comfort functions will be available without re‐
striction and any Check Control messages re‐
lating to the comfort functions will no longer be
displayed.
Safety note
NOTE
Vehicle batteries that are classified as
unsuitable may damage systems or result in
functions no longer being carried out. There is
a danger of damage to property. Only use vehi‐
cle batteries that have been classified as suita‐
ble by the vehicle manufacturer.◀
Charging the battery
General
Ensure the battery is sufficiently charged to
guarantee the entire lifetime of the battery.
The battery may need to be charged in the
following cases:
▷ When making frequent short journeys.
▷ If the vehicle is not used for periods of lon‐
ger than one month.
234
Replacing parts
Online Edition for Part no. 01402981699 - VI/17
Safety notes
NOTE
Incompatible external battery chargers
can damage the vehicle. There is a danger of
damage to property. Use battery chargers that
have been categorised as suitable for the re‐
spective vehicle type by the vehicle manufac‐
turer. Observe the maximum charge voltage.◀
Maximum charge voltage: 14.4 Volt.
NOTE
Battery chargers for the vehicle battery
can operate with high voltages and high cur‐
rents, which can overload or damage the 12-
volt on-board network. There is a danger of
damage to property. Only connect battery
chargers for the vehicle battery to the jump-
starting connections in the engine compart‐
ment.◀
Jump-starting connections
Only charge the battery via the jump-starting
connections, see page 240, in the engine
compartment and with the engine switched off.
Battery charger
Battery chargers developed especially for the
vehicle and suitable for the on-board network
can be obtained from a Service Partner of the
manufacturer or another qualified Service Part‐
ner or a specialist workshop.
Power failure
Following an electrical power outage, some
equipment will have to be reinitialised or indi‐
vidual settings will need to be updated, for ex‐
ample:
▷ Seat and mirror memory: re-save positions.
▷ Time: update.
▷ Date: update.
▷ Glass Roof and sun blind: initialise system.