I have an A6 (2008) and was previously told in 2008 by an Audi dealer that the only Audi-endorsed way to be able to listen to an iPod was with factory fitted Audi Music Interface AMI and that a retrofit was not possible. Now that my iTunes library was recently updated with Matched tracks I was looking at ways to play these great encodes in my car. I almost went the A2DP BT install route but then learnt during a test drive of the new A6 that retrofits of AMI were possible. I then 'auditioned' AMI in a 2009 A6 and was impressed at how good it sounded, the data is sent by fibre optic , not analogue, and you can browse by artist/song/genre etc all through the dash display. I have ordered an AMI self-install kit off-fleabay. I contacted someone who bought from the same seller and they said it was fairly straight forward and was basically swapping the AMI for the CD changer. I will post back once I have received the AMI and done the install. I have found v little info on this in this forum which is why I am posting... and there may be many other Audi owners out there who didn't know about this. Even my local dealer still doesn't know about AMI retrofits. You have to make sure you get the right AMI unit for MMI 2G vs. MMI 3G so you would need to figure out which MMI your car has first.