I recently purchased my 2012 Touareg TDI a month ago. Before I bought it, I test drove several of them because I wanted the improved gas mileage. I didn't know about the "fix" or "post VW fix" and all that. I test drove about 5 of these 2011, 2012, 2013 TDI models. What I noticed is they all seemed to behave a little differently. Some seemed to have more power, while some less power and the transmissions on them also behaved differently too. I don't know how the fix was done on these by VW shops, but from the ones I test drove, I noticed power and shifting different in each. Hopefully a transmission tune and an ECM tune will help. I live in an emissions state for registration so I can't delete anything or will fail emissions and not be able to register the vehicle.