See also:

Tire inflation pressure values up to 100 mph/160 km/h
528i 528i xDrive 535i 550i 535i xDrive 550i xDrive ...

Adding engine oil
Filler neck When the indicator lights up in the instrument cluster, add 1 US quart/liter of engine oil within the next 125 miles/200 km. Protect children Keep oil, grease, etc., out of reach o ...

Deactivating HDC
Press the button again and the LED goes out. HDC is automatically deactivated above approx. 37 mph/60 km/h. ...