I've got the VW TPK installed in my car, and I'm trying to figure out how to access the aux-in option. I found the control box for the kit, and theres a media-in port on it which I presume a special wire/loom plugs into to allow aux playback.
However, all I can find on the internet is this, a cable with an aux and USB input on the German ebay. Searching the product code comes up with nothing, so I want to know if this is what I need, and if I can get it elsewhere rather than trying to figure out ebay in German and then having to get it imported across Europe