Opel MOKKA Owner's Manual page 214

212 Driving and operating
9 Warning
Under certain circumstances,
various reflective surfaces on
objects or clothing as well as
external noise sources may cause
the system to fail to detect
obstacles.
Special attention must be paid to
low obstacles which can damage
the lower part of the bumper.
Caution
In the case of a severe failure of
the vehicle with the need to stop
the vehicle, the system is
deactivated.
In the case of a gearbox failure,
the parking assist system is not
active, when reverse gear is
engaged.
In the case of a loudspeaker
failure, the audible signals may not
be given.
Performance of the system can be
reduced when sensors are
covered, e.g. by ice or snow.
If a sensor is covered, a message
is displayed indicating that the
sensors have to be cleaned.
Performance of the parking assist
system may be limited or the
functionality may not be available
at all if C illuminates or if the
image shown on the Info Display
is frozen or if the screen is black.
Performance of the parking assist
system can be reduced due to
heavy loading.
Special conditions apply if there
are taller vehicles in the vicinity
(e.g. off-road vehicles, mini vans,
vans). Object identification and
correct distance indication in the
upper part of these vehicles
cannot be guaranteed.
Objects with a very small reflection
cross-section, e.g. objects of
narrow size or soft materials, may
not be detected by the system.
Parking assist systems do not
detect objects outside the
detection range, e.g. below the
bumper or underneath the vehicle.
During a reverse parking
manoeuvre, the system does not
consider a mounted coupling ball
bar. The driver has to consider this
additional length.
Note
It is possible that the sensor detects
a non-existing object caused by
echo disturbance from external
acoustic noise or mechanical
misalignments (sporadic false
warnings may occur).
Make sure that the front number
plate is properly mounted (not bent
and no gaps to the bumper on the left
or right side) and the sensors are
firmly in place. The performance of
the parking assist may be reduced if
the license plate is bent or a license
plate support is used.
Low curbs and surface irregularities,
e.g. on construction zones, are not
detected by the system. The driver
accepts responsibility.