Happy days.... yesterday the dealership replaced the fuelpump under waranty and the first the first moment i pushed the throttle i noticed that the car responded completely different than before. The power delivery was way more linear. Normally i experienced a short surg before the boost came in. I did take a couple of corners, where it normally stutters, and no more stuttering at all?! I'm pretty safe to say, let's say 90%, that it has solved my problem. At least it's way better than before. Why not 100%? Because currently the tank is full and normally the stuttering gets worse when the fuellevel gets lower. But for now i'm pretty pleased. Fingers crossed... ?