the problem is that the engine shuts down as the car is on the move and if that happens i cant start it again (sometimes for hours) i have replaced the fuel pump - still the same and cleaned up the fuel pump relay. when i try to start the engine i cant hear the fuel pump if it starts to make noises (fuel pump) than the engine will start and the problem is solved for next few hours of driving. please help i tried almost everything even with MB service - nothing