Small update. I put the engine back together and fired it up, bad news is that it's working on 3 or 4 cyl, looks like there is some problem no cyl 4,6 and maybe 5. They have spark and fuel (but spark plugs look wet on 4 and 6-th ), there is no smoke from the exhaust or the ventilation. Suspect is stack valve lifters which don't close the valves fully and perhaps broken ring lands. A friend also suggested the there maybe a problem with the head gasket. Tonight after work I'll do a compression test a see what comes out.

P.S. Strange thing is that when I disconnect the injector (the electric plug) from cyl 4-6 the engine starts to work smoother .....

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190E 3.0-24v (M104 980) turbo @ 0.8 bar
1/4 mile: 2.483 / 13.540 / 175.17 km/h (street tires)