2,0i sw is in cold condition……….???

moin people. again problems with my SW. when the engine is cold he does what he wants, just not run round. when driving he doesn’t want to speed up properly. always jerks. he is warm it only comes from time to time. have an appointment with the dealer on 15.06.10. please give me a few tips on what that is. I don’t think they know any more. 4x already in the workshop. annoying slowly. thank you your Poldi