Hi, I've done a bit of searching about this but I'm slowly becoming more and more confused.. I'm trying to replace the stock Concert signal DIN head unit with a Kenwood KDC-BT92SD in my 8P 2005 A3. It started out looking like a straight plug and play job but that soon turned into a nightmare I've plugged in the two standard adapters and also connected power to both the Red and Yellow leads but If I understand correctly I need an wiring adapter to plug in the long adapter? There was a yellow plug that seems to connected to the aerial lead which I presume also needs to be connected? as I currently have very poor FM reception. What I really want to know is what components / adapters do I need to purchase in order to: 1) Get a Radio Single 2) Have the unit power on and off with the ignition 3) Connect the long plug (sub?) So after some more reading I think I need the following? http://www.connects2.co.uk/images/pr...w/CT27AA05.jpg - VW/Audi/Skoda/Seat Aerial amplifier http://www.connects2.co.uk/images/pr...w/CTSAD003.jpg - Audi CAN-Bus Steering Wheel Control Interface Appreciate your help and apologies again if this has been covered many times.