System limits
Check the traffic situation as
well
PDC cannot serve as a substitute for the driver's personal judgment of the traffic situation. Check the traffic situation around the vehicle with your own eyes. Otherwise, an accident could result from road users or objects located outside of the PDC detection range.
Loud noises from outside and inside the vehicle may prevent you from hearing the PDC's signal tone.
!Avoid driving quickly with PDC
Avoid approaching an object quickly.
Avoid driving away quickly while PDC is not yet active.
For technical reasons, the system may otherwise be too late in issuing a warning.
Limits of ultrasonic measurement
The detection of objects can reach the physical limits of ultrasonic measurement, for instance:
- With tow bars and trailer hitches.
- With thin or wedge-shaped objects.
- With low objects.
- With objects with corners and sharp edges.
Low objects already displayed, e.g., curbs, can move into the blind area of the sensors before or after a continuous tone sounds.
High, protruding objects such as ledges may not be detected.
False warnings
PDC may issue a warning under the following conditions even though there is no obstacle within the detection range:
- In heavy rain.
- When sensors are very dirty or covered in ice.
- When sensors are covered in snow.
- On rough road surfaces.
- In large buildings with right angles and smooth walls, e.g., in underground garages.
- In heavy exhaust.
- Due to other ultrasound sources, e.g., sweeping machines, high pressure steam cleaners or neon lights.
See also:
Functional readiness of the airbag
system
When the ignition is switch on, the warning
lamp in the instrument cluster lights
up briefly and thereby indicates the operational
readiness of the entire airbag system
and the belt tensione ...
Use coasting conditions
When approaching a red light, take your foot off
the accelerator and let the vehicle coast to a halt.
On a downhill gradient, take your foot off the accelerator
and let the vehicle roll.
The flo ...
Environmental conditions
▷ Say the commands, numbers, and letters
smoothly and with normal volume, emphasis,
and speed.
▷ Always say commands in the language of
the system. The language for the mobile
pho ...
