I had a VW Golf Diesel. Part of the package I got with the car was the first 6 oil changes free. My friends son had a diesel VW too with the same oil change package. When he had to start paying for the changes he decided to do them himself. No big deal to change the oil right? He noticed that the oil plug was hard to get out. Then he couldn't get it started back in the pan, so he put some force on it. Then it leaked. Turns out VW puts new plugs in with every change. He wound up screwing up the pan and it cost him $1200 for the dealer to put on a new pan. After he told me this, I checked my bill and sure enough, there was a charge of about $2 for a new plug, Joe.
As it turned out that VW was probably the best car I ever owned. I payed $23,000 for it new, drove it for four years and put 85K miles on it. In the Diesel fiasco and by back, they gave $21,000 to get it back.