Hey, Yesterday i bought a 02 Mondeo tdci ghia x, unfortunately my cd player isnt working its displaying e4,ive tried opening it up and cleaning the lens but no joy-has anyone got any other tips to get it going? its a 6006 6 cd in dash changer so it would be great to sort it out,but if not could i fit one of those sony models from the st 220's?
any help would be appreciated

 

surely someone knows?