See also:

Functional requirements
There are no external sources of interference nearby. To lock the vehicle, the remote control must be located outside of the vehicle. The next unlocking and locking cycle is not possib ...

For 520i and 528i: Check oil level
The concept The oil level is monitored electronically during driving and shown on the Control Display. If the oil level reaches the minimum level, a check control message is displayed. Displayi ...

Vehicle battery
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. Batt ...