I have a 2000 Boxster S with a cassette player and cd changer. I currently use a Belkin cassette adapter to play my iPhone but wanted to improve on this. The Belkin works ok but the wire is wedged in the head unit door flap and you can hear slight wining as you go thru' the revs, so this is not ideal. Wondered if anyone had got round this problem by wiring into the CD changer or straight into the back of the head unit?