I bought the cable $$ and did this mod in my 2006. I like the function for sure. If you don't want to go to the dealer and don't want to buy the cable, check out this site and looking for a friendly vag owner that is willing to help. I've gotten 2 calls from this site so far from others.
http://www.steve-hall.com/cgi-bin/VAG-Locator.pl
Chances are, if the owner has the cable, they've done this mod