Yes, the water temp sensor connector comes apart. Hold the end that the wire goes into with your fingers, the other end with pliers, and twist. Then you can solder a new wire onto the pin.

The EGR is supposed to have a gasket. You could also cut a piece of thin sheet metal with screw holes only and simply block off the EGR. Essentially invisible and better for the engine to not have exhaust going into the intake.

Your turbo sounds OK. Oil under pressure forms the bearing and there's a fair amount of slop in the actual metal surfaces.

The black box I do not have.

Jeremy

__________________

"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970