My '95 E300D was missing that bolt (had a "regular" bolt like other MB diesels have for their secondary filter) when I got it. I installed one of those expensive shut-off valves and had the same results as others -- it does not stop the engine. I ran it for several minutes. After reading this thread, I'll try again and put a clock on it.

Jeremy

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"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