I sold my '13 SEL with 60k miles back to VW, and waited 6 months - bought a '15 Passat TDI SE with only 20k miles. Dealership claims it was "fixed" and they were unwilling to Un-fix it for me.
Took it for a spin from Indianapolis to Baltimore and back, 1250 miles total, and Fuelly reports 54mpg.
I set the cruise control at 70mph, a hair over 1800 rpm. I briefly saw 56.3 on the screen (1) before having to climb up the Allegheny mountains east of Wheeling.
I gotta wonder if they bothered "fixing" it at all. Been considering a tune, even if it were just to restore it to factory settings, but my SEL never got over 53mpg (Indianapolis to Galveston) so I'm going to leave it alone.
Next vehicle will likely be a VW I.D.