I was drawn to the TDI by its sleek design, great handling, and its incredible fuel efficiency (50 miles a gallon means that I go to a gas station a little more than once a month). What I did not expect, after I had owned several Golfs prior to this one, were the major problems with reliability. Nearly from day one, things started to break: sunroof, door locks, glow plugs, electronic command module, my ignition key was not recognized and the car disabled itself. Now, the turn-lights aren't working and the "check-engine" light is on again. I should have been more suspicious of the 2-yr warranty. All that in 2.5 years plus really lousy service is more than I can handle.
Gas mileage is great and the performance is about the same as the pathetic 2.0 engine. Reliability is a serious issue. Both tie rods, the infamous VW window regulator, a brake relay, and now the power steering pump have all failed after the lame warranty ran out. German engineering is a myth. These cars break just as often but cost twice as much to fix.
I bought my TDI new. I have put on a lot of miles, so the good gas milage is great. However, I have experienced high repair cost so what I am saving in gas I am paying in repairs. Not many mechanics can work on diesel engines so I am a the mercy of the dealer. At 80K miles my turbo died. Still waiting to hear why and how much it is to repair. Service provided by VW is very expensive ($82/hr for labor). Additionally, VW charges more for any work done on a diesel vehicle. Regular oil change cost $55.