You can start the car fine when it is cold. Once it is started you may make it to your destination with no problem but once you shut it off you can not restart it for some time. Other times it has stalled in the middle of the road. I had it to some mechanics (not import specialists) and they are dumbfounded. I really am trying to fix the problem myself before having to take it to a dealer. If anyone has any ideas please let me know. I am almost at a lose and it seems any other problem gets solved through here.

this is the B7 forum - the car is not out yet.

I would think the only reason for not taking the car to the dealer is because you are out of warranty. This problem appears to be a issue of when the car is warm/hot - could be a relay or a bad sensor. You need to get it to a shop that can read the codes and determine what is wrong. The codes themselves may not indicate the problem - only a symptom (i.e. a bad o2 reading does not necessarily mean you have a bad o2 sensor)