Ive been looking into this, wanted to connect iPod/iPhone into my head unit and control it from there. Ive found this wiring adapter which should do the trick : http://www.caraudiosupermarket.co.uk/441-iPOD-OEM-Interfaces-VW-IPOD-ADAPTOR-(2003-2010)-RCD200---RCD300---RCD500-~-IPOD---IPAD---IPHONE.html pretty easy to fit apparently, waiting for it to arrive and will update