Update on the 190E,
I flushed the fuel system and changed the fuel filter. I cleaned all of the engine electrical connectors. Alot of them had signs of corrosion. It primed the fuel pumps and built pressure no problems no leaks. Then I got the oil filter today. I changed the oil and cranked it over without the spark plugs until I it built oil pressure.
Then it was time for a first startup attempt:
I can't run it for long until I replace the freeze plug in the cylinder head which means exhaust manifold must come off. But it did move under its own power briefly today for the first time in around 14 years. The fuel injection system isnt too happy ill have to look into that.