Measurement
Measurements are made by ultrasound sensors in the bumpers.
The range is approx. 6 ft/2 m.
An acoustic warning is first given:
▷ By the front sensors and two rear corner sensors at approx. 24 in/60 cm.
▷ By the rear middle sensors at approx. 5 ft/ 1.50 m.
See also:
BMW X3 iDrive Owners Manual
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The concept
The central locking system becomes active
when the driver's door is closed.
The system simultaneously engages and releases
the locks on the following:
▷ Doors.
▷ Trunk lid.
▷ ...
Adjusting
Vehicle
Equipment
...