I can tell you from working as a manager of a VW/Audi store that Audi AG does link back the customer contact info to the survey link. So the procedure on RDR (vehicle purchase) surveys is that if you give anything but a perfect survey, the dealership must talk to the customer (no voicemail), remedy the situation, then…

Snow Plows.

The dealerships actually have nothing to do with the entire process. Heck, the only authority the settlement specialist (the VW employee in the dealerships) has is to cancel an appointment due to excessive miles. Everything is run by VW, and the court.