Takes forever (30 min.) to warm up, stumbling and jerking under any acceleration. Once warm, still has a noticable hesitation/stumble at 3500 rpm at 2/3 throttle. This problem was not apparent when I took delivery, but over the last month or so has gotten increasingly worse. Now have about 2500 miles on the car.

Any ideas?

__________________
Eric M. Isselhardt, Ph.D.
Headmaster, Norbel School
"Educating for a Difference"
Mercedes C240
Kawasaki ZRX1200 (the faster green one)