See also:

Visual warning
The approach of the vehicle to an object can be shown on the Control Display. When the distance to an object is small, a red bar is shown in front of the vehicle, as it is in the PDC display. ...

Head airbags
In a lateral impact, the head airbag supports the head. ...

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 ...