See also:

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. ...

Adding engine oil
Filler neck BMW X5 BMW X6 Add a maximum quantity of 1 US quart/1 liter of oil only after the corresponding message appears on the Control Display. Add oil promptly Add oil within the ne ...

For X3 xDrive28i: Oil levelcheck
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 ...