HI I have recently bought a 2008 Audi A4 SLine convertible. It has an RNS system in, It has 2 SD cards slots- Would this make it an RNS - E or D? Also how much is the ipod connector if it is the RNS-E? If it it isn't and the cheapest way to put music on it would be SD cards. Can I literally just copy my itunes Music folder on to a SD card and shove it in? Or would I need to convert the music to a different format? Thanks!