See also:

Deactivating HDC
Press the button again and the LED goes out. HDC is automatically deactivated above approx. 37 mph/60 km/h. ...

Resuming cruising speed
Press button 4: The stored speed is resumed and maintained ...

Compact Design
Just as BMW's compact 3 Series ranks below the midsize 5 Series, the five-seat X3 sits in the shadow of the larger X5. The styling clearly says BMW, but it's the multi-paneled look of earlier mode ...