When stopping and accelerating you get a jerk and a thump like someone has hit you from behind. Dealership states "after trying to fix the problem" for more then 4 times that this is due to the movement of fuel in the fuel tank and is a normal characteristic of this kind of vehicle in this model year. Moreover they state that eyery vehicle in this model year has the same charecteristic. The manufacturer has backed the claim of the dealership that this is normal to get a jerk and thump when stopping and accelerating. Please advise that if there is a problem with such violent movement of fuel in fuel tank and if it is a safety problem which could result in failure of part and possible fire or failure of any other part and if this is a normal characteristic of this vehicle as the dealership and manufacture states.

- Frederick, MD, USA