[PsYcHe]

MAF can cause gearbox nonsense, but if you've just had it done, chances are it wasn't done right.

My local indy will only do a gearbox if he can have the car overnight to make sure it's all up to the correct temperatures as it's easier to get it there going up then cooling down. They are also really sensitive to the correct oil, so if they haven't used the Audi oil (or the Esso equivalient) it could go all wrong.