See also:

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

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 ...

5 Series in the Market
The things that trouble me about the 5 Series — high price, fewer standard features than some competing models — are things that sort themselves out. If BMW is asking too much for too little, cons ...