I've just bought a 2003 A3 last week, I've been really impressed with it so far, but this morning was the first morning with a temp below 0c outside (EDIT: it was about -1.5c). I was sat in traffic for long enough so never noticed, but once i hit a free spot on the motorway i put the foot down and it wouldn't go. It seemed to hit a ceiling as far as speed is concerned, not going above 2500 revs, and when i left the motorway and moved onto city streets, it accelerated very slowly. This is my first car with ESP (or any traction control type system for that matter), is that what would be causing this or do I have something to worry about? I have a 1 month guarantee with the dealer I bought it from, so I want to make sure nothing is faulty as soon as possible. Thanks!