It seems to be rare when somebody actually posts that a fix was done and how it took place. 2005 Jetta TDI (early '05), 171k miles.....I love my car.... Cruise control has been non-functioning for a couple years now. After taking it to four, yes I said 4, independent shops and 1 VW dealership I finally got it fixed at independent #5. Whoo hooo!! Everybody kept saying it was the ECM. I gave in and took it to #5 and they said it was a relay. Ookaaaay....how confident are you that it's going to fix it, I asked....."very" was the response & that I wouldn't have to pay for anything if it didn't fix it. OK, fix it. And, they did!! So, just wanted to let everybody know that if you are having cruise problems and all the on/off, set/resume switches and brake light switches, etc didn't (or won't) fix it.....try a relay. I have no idea which one, but it's at least a direction to go in.