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:
Driving
Ignition switch
• S: Steering lock
To free the steering, turn the steering wheel slightly at the same time as turning
the key, avoiding any undue force.
• M: Ignition
• D: Starter
Release the ...
RDS system
Using the RDS (radio data system) function on FM
The majority of FM radio stations use the RDS system. The radio in your vehicle
has this system.
The RDS system enables these stations to transmit ...
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 ...






