According to my local dealer there have been a lot of probs with cd players causing havoc with the display and also the Engine Managment unit. Citroen are in the process of making up a list of compatible units. As for the prices on the web site, don't trust them. I got my local dealer to supply and fit the CD player (which is a Clarion multichanger compatible) for £200. All I need to do now is find out what speakers are compatible so I can upgrade the 'paper' ones that are standard fit.