like I thought, it wasn't the Fuel Injectors. had them tested and even got new o-rings as the current were starting to crack, but it wasn't the issue preventing the lack of firing. the guy at the shop who tested them even said they spray and perform like new...at least some good news.

after doing more research, similar issues people had said that changing the Crankshaft Position Sensor has resolved their intermitent no firing. could the CPS be causing this complete no fire even after the car sat overnight to completely cool down? or could the Ignition Module be fried?

any way to test the CPS or Ignition Module? I'm probably gonna visit a shop in my area that has old MB's and maybe I can find a W140 to try a temp sensor and module swap before forking the cake on new parts.

...back to searching I go.