See also:

Low tire pressure message
  The yellow warning lamp lights up. A Check Control message is displayed. ► There is a flat tire or a major loss in tire inflation pressure. ► The system was not reset after ...

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 ...

For the 530i, 535i, 550i, 525d, 530d and 535d: check oil level
The concept The oil level is monitored electronically and displayed on the Control Display. Requirements ▷ The engine must be running and warm after the vehicle has been driven for at lea ...