I have a 2007 A4 2.0T with Tiptronic. In the cold and damp weather
(-10F and with snow) my Audi starts and runs really rich (like a stuck choke, on cars with a choke) even down the road till it is warm it surges about 10 mph gallops. It has been to the dealer numerous times with no fix and they can not replicate it, by the time it is there it is warm. I even left it there, but can not match the cold weather starts. Has anybody had this problem? It goes in on Thursday for another round with Audi.. Any help is welcome. Thanks

Any car in that cold of a temperature is going to perform less then optimal until everything has had a chance to warm up. I would check your oil to make sure its appropriate for your climate and perhaps let the car sit and warm up for a few minutes before putting it in gear and driving. Pretty much every car I own runs a little rich when I first start it up in the cold weather, returning to normal after it gets a chance to warm up. I'm not sure the exact technical reason of it, but its something that I have seen on multiple vehicles and don't consider abnormal.