Problem solved, today at around 3am, coming back from work, empty stretch of highway I decided to test out my theory. I thought to myself if any of the junk from the tank or debris that got into the injectors or anywhere along the fuel system got stuck somewhere it would give me the symptoms I am experiencing. So I figured if I could hold high RPMs for a little bit I should be able to blast out the debris into the combustion chamber. So here it goes, 3am, empty highway, I raced the car upto 185kn/hr for about 4 km then held at 140km/hr for 2km then got off my exit. Guess what? shaking gone.....

Note, I did replace the M.A.S sensor (fuel relay?) before I went to work, but it did not help at all, everything was the same, in fact I drove my car hours before and it was still shaking. And when I got off from work, before I hit the highway it was still struggling to keep up.....

Funny how things work out. For my car its been one thing after the other, but no matter what amount of money it takes (that i dont have) I am not going to give up on it.

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190e 2.6 1990. 300,000 KM
C230 K 2000, 130,000 KM