w124- om606 engine trouble need help!

So i have a 300td- om606 that had a lot of air in the diesel lines when i bought it.
Change all the clear lines from pump also injector O rings on the pump, hoping that will fix ruff idling. Of course the air problem got fixed but i still have bad idling like its not running properly on every cylinders, this starts whitin 1min after startup if i turn off and on the engine it is fine again for some minutes and then the ruff idle comes back. Changed one injector that i tought was faulty but the same weird idling comes sneeking up every time.
It was a lot of oil on the injector that cant be so good ?
It smokes alot blue grey too when its idling weird.
maby timing is of ?
valve seals ?
injectors are all bad ?
VIDEO-


