CITROEN DS3 Handbook page 163

Operating faults
Sensor fault
The operation of the laser sensor may suffer
interference from accumulations of dirt or
misting of the windscreen. In this case you are
warned by the display of a message.
Use the windscreen demisting and regularly
clean the area of the windscreen in front of the
sensor.
Do not stick or otherwise fix any object on
the windscreen in front of the sensor.
System fault
In the event of a malfunction of the system, you
are warned by an audible signal and the display
of the message "Automatic braking system
fault".
Have the system checked by a CITROËN
dealer or a qualified workshop.
In the event of an impact to the
windscreen at the sensor, deactivate
the system and contact a CITROËN
dealer or a qualified workshop to have
your windscreen replaced.
Never try to remove, adjust or test
the sensor.
only a CITRoËN dealer or a qualified
workshop is able to work on the system.
When towing a trailer or when the
vehicle is being towed, the system must
be deactivated.
161
Safety