Almost every VW dealer in US has scores of these cars sitting in their inventory that they cannot sell and are crying about it. If you can delay the purchase for a month or three, you may get a new car at a bargain. I would do two things: 1. wait and monitor this site and the TDI forum at
www.tdiclub.com to see how the "fix" is performing; 2: if acceptable, go and look and say to them "boy I really wanted one, but now I guess I'll go and buy a prius..."