See also:

Diagnosis OBD
On the driver's side is an OBD socket for checking components relevant to the composition of the vehicle's emissions. ...

Remove unnecessary cargo
Additional weight increases fuel consumption. ...

Braking: One Step Up, Two Back
There is an aspect of the 5 Series that we do object to, though, and that's the braking. To be clear, the car stops well enough; it's not a safety concern. The problem is the feel of the braking, ...