hello i have bought a w212 e220 with om651 engine.
Milage actuall 500000km :/
replaced parts to Find a problem
engine oil filter
New injector. Coded And calibrated..
engine rocker cover. Cause blow by valve is located there.

so the actual problem is.. 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. Engine mounts are good. Haven checked compression jet. But engine does push out the dipstick but no oil is coming out true it. And sometimes engine doesn’t want to start right away sometimes it starts perfect I can send a video of car running

I am planing to do compression test true injector holes. I have made a tool from old injector. But yeah. Might it be the valve wich is located on the fuel pump? Cause car runs good and have a lot of pover just feels rough. And sometimes idle does not want to stabilize. And sometimes. If u give gass up to maybe 2k u can see needle moving a bit so the engine is running uneven. A video of blowby. Oil in injector holes is cause of broken oil cap.