Mercedes w123 200D engine shaking issue
 

Hello i am new here and I would like to get some tips from you. When i start the car especially if the engine is cold the engine shakes like it's going to stall and when i give it a little gas it works better and i keep the idle a little higher. But again when the engine is warm it feels like a tiny millisecond break like there's air in the hoses or something. Otherwise when the car is driving it runs fine. Can you help with this I would be grateful.
I was changing the primer pump because the old one was throwing out a lot of fuel when it was pumped and I also changed all the rubber high pressure hoses that go around the injectors, fuel filter, oil filter, oil, air filter and I thought this would solve the problem but again it's not that.
The glow plugs are new.
Please help I would like to get rid of this annoying shaking

It could be something as simple as collapsed motor mounts, which is quite common with Diesels. Check the easy stuff first.

Yes and i think i am gonna need to do valve adjustment