See also:

Refueling
Always switch off the engine before refueling; otherwise, fuel cannot be added to the tank and a message will be displayed. Take all precautionary measures and observe all applicable regulation ...

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 ...

Fuel specifications
Gasoline engine: required fuel Do not use fuels that are labeled at the fuel pump as containing metals. Only refuel with lead-free gasoline without metal additives Do not refuel with leaded ...