Just clearing out the shed and found this that i took out of my RS6 when i sold it. It basically replaces your 6 disc changer so you can use an ipod. My glove box had a hole in the side and the lead was then fed through so the ipod sat in the glove box. You could then control your playlists through the main Audi head unit, like the CDs i.e your top 6 playlists were 6 CDs. I was going to bin it, but it might be of use to someone who is familiar with this. Older style iPod collection, but I am sure you can get an adapter for this. Also comes with instructions and keys to remove your Audi RNS head unit.
Free collection from me in Ilkley West Yorks, or I will post and then when you have it all fitted and working you can send me a tenner via paypal for a beer and to cover post and trip to post office


PM me if interested.
Cheers,
Lig.