Display in the instrument cluster
The collision warning can be issued in the instrument cluster, in the Head-up Display, and acoustically.
Warning stages

Adapting your speed and driving style
The display does not relieve the driver of the responsibility to adapt his or her driving speed and style to the traffic conditions.
See also:
Dimensions
Coupe
All dimensions given in inches/mm. Smallest turning circle dia.: 35.1 ft/10.7
m 135i: height 55.4 in/1,408 mm
Convertible
All dimensions given in inches/mm. Smallest turning circle dia.: 35 ...
General information
If you are no longer able to move the roller sunblind
for the rear window after having activated
it a number of times in a row, the system is
blocked for a limited time to prevent overheating.
...
Malfunction
A Check Control message is displayed.
On the Control Display, the areas in front of and
behind the vehicle are shaded. PDC has failed.
Have the system checked.
To ensure full operability:
...
