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:
Resetting values
The average fuel consumption and average
speed can be reset.
Press and hold the computer button on the turn
signal lever. ...
Vehicle equipment
All standard, country-specific and optional
equipment that is offered in the model series is
described in this chapter. Therefore, equipment is also
described that is not available in a vehicle, ...
BMW X3 iDrive Owners Manual
h1 {color: red;}
h2 {color: green;}
h3 {color: blue;}
h4 {color: #FF00FF;}
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