The Citroën C4 Picasso's are models of environmental efficiency. Our e-HDi micro-hybrid technology combines an HDi engine with a new-generation Stop&Start system and a system to recover energy during deceleration. It helps you limit your fuel consumption and reduce CO2 emissions without any trade-off in performance. Whenever you stop, the engine simply cuts out. As soon as you release the brake pedal, the engine starts up instantly and automatically, without any further action by you.