Hey I have a problem with my mercedes. Engine2.2 om651. When engine is started it gives a bit of vibration. When u push a bit of gas pedal an release immediately it starts to vibrate even more and then stabilize again. It vibrates even more when changing from parking to drive or reverse. I have tested injectors and they are calibrated. New filter is fitted to. And while accelerating car feels a bit like a tractor. But still have a lot of pover. Maybe somebody have had same problem? And have solved IT?