Operating fault
In the event of a fault with the brightness sensor, the lighting come on, this warning lamp is displayed on the instrument panel and/or a message appears on the multifunction screen, accompanied by an audible signal. Consult a CITROËN dealer.
In fog or snow, the brightness sensor may detect suffi cient light. Therefore, the lighting will not come on automatically.
Do not cover the brightness sensor, coupled with the rain sensor and located in the centre of the windscreen behind the interior mirror; the associated functions would no longer be controlled.
See also:
Interior lamps
Interior lamps
Unclip the transparent cover of the interior lamp to reach the bulb.
Bulb: W 5W
Spotlamp
Detach the cover.
To access the bulb, detach if necessary the partition of the affected s ...
Electronic stability programmes
Electronic Stability Programme (ESP) and Traction Control (ASR)
These systems are closely connected to the ABS and additional to it. Where a
difference is detected between the trajectory followed b ...
Comfort & convenient technology
The new Citroën C4 is designed for business-class travel with intuitive,
intelligent technology enabling owners to tailor the new C4's environment and
ambience to their own preferences. For e ...