Here are the Part numbers if you wanted to add heated seats yourself All you need is some wire and a few plugs.
B6/B7 HVAC Unit with heated controls
3B0-972-734 x2
380-972-712 x2
2 Green Connectors Not sure on Part number for these but it shouldn’t be hard to find. The dealer can tell you, I got it from them once but can’t find it. They won’t have info on the other connects most likely as they could not figure that part out for me.
Wire with connectors, some connectors are different sizes, you’ll just have to pick which ones when you buy the connectors. Dealer should stock all sizes.
Pin 1 Green - Pin 1 on Black 8 pin connector
Pin 2 Green - Pin 2 on Black 8 pin connector
Pin 3 Green - Pin 3 on Black 8 Pin connector
Pin 4 Green - Pin 4 on Black 8 Pin Connector
Pin 5/6 Green Empty
Pin 6/7/8 Black Empty
Pin 3 also splices in middle to connect to Pin 2 on Black 2 pin connector
Pin 1 on Black 2 pin Connects to Pin 5 on Black 8 Pin connector
I have pictures of these connections if anyone is confused pm me I’ll send you them. Its pretty straight forward.
http://i1190.photobucket.com/albums/z457/A4QuattroV6/AR%20and%20AZ/20150507_221218_zpsneohuxts.jpg