brburrows

Hi there I want to install a 3.5mm cable so I can listen to mp3's in my c4. It is a 2005. I have done a bit of research and I believe that I need to install a 9706ag lead and get a citroen dealer to unlock the stereo? However, when I called the West-London branch they said this was impossible and I would need to basically buy a new stereo? Does anybody know whether I can actually get a lead installed in or not? Many thanks