See also:

Central locking system
The concept The central locking system becomes active when the driver's door is closed. The system simultaneously engages and releases the locks on the following: Doors. Trunk lid. Fuel ...

Fuel specifications
Never use fuels labeled at the fuel pump as metal-containing. Do not use leaded gasoline or gasoline with metal-containing additives such as manganese or iron; doing so can cause permanent damag ...

Close the windows and glass sunroof
Driving with the glass sunroof and windows open results in increased air resistance and raises fuel consumption. ...