See also:

Maintenance
Maintain the vehicle regularly to sustain the road safety, operational reliability and the New Vehicle Limited Warranty. Specifications for required maintenance measures: ▷ BMW Maintenance ...

Releasing the parking brake manually
In the event of an electrical power loss or electrical malfunction, you can release the parking brake manually. Secure the vehicle against rolling Before releasing the parking brake manually, ...

Maintenance
The battery is maintenance-free, i.e., the electrolyte will last for the life of the battery. Your service center will be glad to advise you on questions regarding the battery. ...