You are in a bad spot, I think it unlikely VW will do more. Unfortunately this is "normal" for VW's standard of customer care. (And is why I no longer own, and will never again own, a VW.) How bad do you need the car? Can you afford to just let it sit while fighting VW? If so I would try local media as a first step. It's cheaper than a lawyer. Is there a TV station with a consumer reporter in your area? Contact them, I bet with all the emissions trouble going on they would love to get a "scoop" on another problem area with VW TDI's. Worth a shot. Good luck.