BMW 3 Series Owner's Manual page 40

CONTROLS
▷ Under certain weather conditions, e.g., high
relative atmospheric humidity, wet conditions,
snowfall, cold, extreme heat, or strong wind.
▷ With tow bars and trailer couplings of other
vehicles.
▷ With thin or wedge-shaped objects.
▷ With moving objects.
▷ With elevated, protruding objects such as
ledges.
▷ With objects with corners, edges, and
smooth surfaces.
▷ With objects with a fine surface structure
such as fences.
▷ For objects with porous surfaces.
▷ With small and low objects, for instance
boxes.
▷ With soft obstacles or obstacles covered in
foam material.
▷ With plants and bushes.
▷ In automatic car washes.
▷ On uneven surfaces, such as speed bumps.
▷ Due to heavy exhaust.
▷ Cargo that extends beyond the perimeter of
the vehicle is not taken into account by the
ultrasonic sensors.
If applicable, a Check Control message will be
displayed when the system limits are reached.
40
Sensors of the vehicle
Online Edition for Part no. 01405A38F56 - VI/21