Remove attached parts following use
Remove auxiliary mirrors, roof or rear luggage racks which are no longer required following use.
Attached parts on the vehicle impair the aerodynamics and increase the fuel consumption.
See also:
Reference
This chapter contains technical data, short
commands for the voice activation system, and an
index that will quickly take you to the information
you need. ...
Remove unnecessary cargo
Additional weight increases fuel consumption. ...
Tire inflation pressure values up to 100 mph/160 km/h
320i
328i
335i
...