See also:

Diesel particulate filter system
Complementary to the catalytic converter, this filter makes an active contribution to the preservation of air quality by the retaining of the unburnt pollutant particles. Black exhaust fumes are t ...

Cruise control
This driving assistance function allows you to drive at the speed of your choice without the need to action the accelerator. It is active over speeds of around 40 km/h (25 mph). Remark: For the ...

Power & dynamics
On the road, the new Citroën C4 combines the highest standards of ride smoothness and responsive handling for an enjoyable driving experience. The suspension settings are tailored to the powe ...