Limits of ultrasonic measurement
The detection of objects can reach the physical
limits of ultrasonic measurement, e.g., in the
following circumstances:
▷ For small children and animals.
▷ For persons with certain clothing, e.g.
coats.
▷ If there is an external disturbance of the ul‐
trasound, e.g. from passing vehicles or loud
machines.
▷ When sensors are dirty, iced over, damaged
or out of position.
▷ Under certain weather conditions, such as
high relative humidity, rain, snowfall ex‐
treme heat or strong wind.
▷ With tow bars and trailer hitches of other
vehicles.
▷ With thin or wedge-shaped objects.
▷ With moving objects.
▷ With elevated, protruding objects such as
ledges or cargo.
▷ With objects with corners and sharp edges.
▷ With objects with a fine surface structure,
such as fences.
▷ For objects with porous surfaces.
Low objects already displayed, e.g., curbs, can
move into the blind area of the sensors before
or after a continuous tone sounds.
The parking assistant may identify parking
spaces that are not suitable for parking.
Malfunction
A Check Control message is displayed.
The parking assistant failed. Have the system
checked.
Seite 126
CONTROLS
Driving comfort
126
Online Edition for Part no. 01 40 2 927 905 - II/14
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