The vehicle had been leaking fuel from the injectors onto the engine block since new. I have the best Citroen mechanic in the region, who immediately diagnosed the cause of the persistent fuel smell in the cabin was the injector fuel leak. A solid block of carbon had built up around one of the injectors. A harsh solvent and days later the only repair was to clean the top of the cylinders and tighten the injector. The cause was basically poor build quality control.
The mechanism to replace the bulbs is simple and simply diabolical. The instruction manual is rubbish. Only YouTube helped. The short story is you need to perform a squeeze operation whilst looking through a little hole using a mirror. The designer should be sent back to school. Best option is to drive straight to your Citroen mechanic and have them do the repair.
Driver's seat has a small tear, and padding is coming out in small bits.
Anti-pollution device malfunctions under hard acceleration and then limits your revs to 2000 for a while. The issue is avoided if you drive very sedately all the time and/or accelerate smoothly. No one has been able to give a good diagnosis so far.
I actually really like the Citroen C4 HDi. It is very economical. On highways driving we have travelled 1200kms on 60L.
It is quick, pretty smooth, predictable, handles well, and has been a good vehicle.
The version I have is with a glass roof, which is fun at night.
Like the steering wheel with the stationary middle part and the level of standards you get with this car. It is a value for money vehicle.
I would purchase another Citroen; maybe the DS3.