This is my 2009 Jetta Turn in to VW story. This is related to the emissions lawsuit settlement and vehicle buy back option for the TDI VW engine. ( Turbocharged Direct Injection )

This is related to West Virginia University's test laboratory (Dan Carder, director of WVU's CAFEE) that found out that the computer on the TDI changed the performance tuning or calibration when it detected that it was being tested for fuel economy/emissions.