Just interested if anyone else has experienced this and if so how it was resolved. I've just replaced my Conti Sport Contact 2's all round with Conti Sport Contact 3's. The road noise went down noticeably. However, since getting these tyres fitted my S3 has developed an annoying hestitation when flooring at high speed. It might just be coincidence as I'm sure the problem wasnt evident when the tyres were first replaced. It sort of stutters and is now back at the dealers in an attempt to resolve the issue. I'm not sure if the tyre change is connected with the problem but, the dealer has had the car for four days now and is busy going through a list of swop overs that Audi HQ has suggested. I've just heard today that they still can't resolve and Audi HQ have suggested swopping all four wheels out from a new S3 to see if the problem persists. They think it might be a wheel not 100% round or tyres which is forcing the ESP to kick in at high speed when you have your foot to the floor. Car is a 2010 model with aprox 21000 miles on the clock and on its 2nd set of tyres. Problem occurs at speeds say in excess of 60mph. If I push accelerator to the floor the car will accelerate and then get to a point where it sort of stutters or hesitates. More noticeable at higher speeds and seems to be doing it more frequently than when I first noticed a few weeks ago. Car went in for 20k service and problem was mentioned and they replicated but, said it needed to go back for a few days of detective work! If anyone else has had a similar issue I'd be interested to hear.