The interior of the VW is junk. The armrest latch doesn't work anymore, the glove compartment door hinge is busted and it is like every non black plastic part has a vinyl coating that is pealing off. These are all common problems according to tdiclub. I also have a check engine light pulling a glow plug code. I have replaced the glow plug harness as that was the likely culprit, but still have the code. The Milage outwieghs the problems though.
A post I can agree with

Did you check the all the glow plugs resistance? I've had to replace a couple already.
Once we pick up an 80 or 100 this fall i'll get the TDI full time for commuting since the wife's is only a couple miles