Close the windows and glass sunroof
Driving with the glass sunroof and windows open results in increased air resistance and raises fuel consumption.
See also:
Priority options
The driver has priority
The source selected via iDrive in the front is
output on the vehicle loudspeakers and can
be selected but not operated from the rear.
Other audio or video sources ...
Rear CD/DVD player
1 CD/DVD slot
2 Eject CD/DVD
3 On/off, right
4 Headphone connection, right
5 RCA sockets
6 Headphone connection, left
7 On/off, left ...
Coolant level
Checking
1. Let the engine cool.
2. Turn the cap of the expansion tank slightly
counterclockwise to allow any excess pressure
to dissipate, and then open it.
3. The coolant level is correct if ...