Re: passenger brake facilty
After watching Watchdog last week which featured the C3 Picasso's which could be braked by pushing your foot on the passenger foot well I thought I would try the experiment on mine. My cars footbrake did not go down at all so I am guessing my car is not affected, but if it is I am sure Citroen will write to me so I can book the car in at my local Citroen dealership to have the necessary modification fitted.
It's not about generally pushing down on the footwell. The connecting rod for the servo is in the passenger well, at the top and can be inadvertently pushed. If you crane your neck, you'll see it.
On my Scenic, I must say that it does take some effort to do it though.
As for Citroen writing to you, I would expect them to, but if I were you I'd still like to get it checked out if they don't write.