See also:

Tire inflation pressure values up to100 mph/160 km/h
X3 28i X3 35i ...

Remove attached parts following use
Remove unneeded auxiliary mirrors, roof or rear luggage racks after use. Attached parts on the vehicle impair the aerodynamics and increase the fuel consumption. ...

Roof-mounted luggage rack
Note Installation only possible with roof rack. Roof racks are available as special accessories. Attachment to the rack Follow the installation instructions of the roof rack. Mounting Be sure ...