Yeah it does have a vag switch for them to work, under long coding options, I would check your current looms as Audi do tend to wire in number of things but not connect them up the other end, you should have cut outs in the door cards, but have to manually check yourself when removing the cards to check wiring.
Can be done & number people done this already, do a search on AS & also check navplus.us for anyone as I'm sure seen on there somewhere.