rogerde

Hi, new to this so here goes. I have a axsara Picasso (52) plate. I'm looking into fitting a CD changer, but do not no were to start. I need some answers to some questions. 1: Which CD changer do i have to fit, or can i just put in anyone. 2: where do i put CD changer and where does cable go from changer to head unit. I'v pulled out head unit and wrote everything down off the label, so if anyone can give me some advice on this subject please let me no what info you need off the unit. The head unit has a button for CD changer and there is an extra multi plug connection in the back of the unit. Any advice would be much appreciated. Thanks Rogerde