xxGenericSNxx

I'm trying to retrofit the iPod integration into my 2007 R with factory rear seat entertainment. From my searches on the forum I'm looking for the Automatic Audio Selector Switch, commonly known as the AASS cable. I'm trying to get info from my dealer but they don't really know where to begin. Basically I just need the part number to assist the parts department in ordering this part. Will I also need to order the iPod cable as well? My car doesn't have iPod from the factory.

PS I posted this here because most of the search results linked back to this forum.