You will love the mpg in the TDI but one thing I could not stand was the fact that I HAD to take my car into VW to get an oil change and you had to schedule it. Crazy. Other than that I only had a few things go wrong with the car like the radiator fluid leaked out twice and they had to fix that, the front end had some issues then my biggest thing was my clutch was acting really weird in the car, like I would take off and the RPMs would rev up but the car would be accelerating very slowly, then all of a sudden that problem vanished, really weird. But anyways, good luck with the Jetta, I had some buyers remorse when switching to the Jeep but I have put everything into perspective once again and am happy I did it.