I've just heard from a knowledgeable Mercedes owner that "B92xxxx is a very late 1993 model year, probably May/June 1993 build (approx)." Since 1993 was the last year of the 300D-2.5, that means few were made with the combined aux. pump / monovalve and even fewer remain today.

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