Anti-theft protection
Electronic engine immobiliser
The key contains an electronic chip which has a special code. When the ignition is switched on, this code must be recognised in order for starting to be possible.
This electronic engine immobiliser locks the engine management system a few minutes after the ignition is switched off and prevents starting of the engine by anyone who does not have the key.

In the event of a malfunction, you are informed by lighting of this warning lamp, an audible signal and a message on the multifunction screen.
In this case, your vehicle does not start; contact a CITROËN dealer as soon as possible.
See also:
Rear lamps
1. Brake/sidelamps (P21/5W).
2. Direction indicators
( PY21W amber)
3. Foglamp, left-hand side
( PR21W red)
Reversing lamp right-hand side
(P21W).
Amber or red bulbs, such as
those for the d ...
Efficient engineering
Citroën has utilised the latest industrial technologies, along with a 'part
by part' focus on reducing the weight and number of components in new C4. For
example, the laser welding on the roo ...
Manual adjustments
1. Adjustments to the height and angle of the head restraint
To raise it, pull upwards.
To lower it, press on the control A to unlock it, and simultaneously on the head
restraint itself. The adj ...






