Opel CORSA Owner's Manual page 165

The system has four ultrasonic
parking sensors in the rear bumper.
Activation
When reverse gear is engaged, the
system is ready to operate
automatically.
An illuminated LED in the parking
assist button r indicates that the
system is ready to operate.
Indication
The system warns the driver with
acoustic signals against potentially
hazardous obstacles behind the
vehicle in a distance range up to
1.5 metres. The interval between the
sounds becomes shorter as the
vehicle gets closer to that obstacle.
When the distance is less than
approx. 30 cm, the sound is
continuous.
Additionally, the distance to rear
obstacles is displayed by changing
distance lines in the Driver
Information Centre 3 97 or,
depending on the version, on the
Colour-Info-Display 3 102.
The distance indication can be
inhibited by vehicle messages with a
higher priority. After approving the
message by pressing SET/CLR on
the turn signal lever, distance
indication appears again.
Driving and operating
Deactivation
The system automatically switches
off when reverse gear is disengaged.
Manual deactivation is also possible
by pressing the parking assist button
r.
In both cases, the LED in the button
extinguishes.
Fault
In the event of a fault or if the system
does not work temporarily, e.g.
because of high external noise level
or other interference factors, the LED
in the button flashes for
three seconds then extinguishes.
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