See also:

12 V battery
All engines except V6 HDi Starting the engine after disconnecting and reconnecting the battery 1. Turn the ignition key. 2. Wait approximately 1 minute before operating the starter in order to allo ...

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. T ...

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 ...