Rubber bushings are one of the areas where it's almost mandatory to use factory parts or at least German brands line Lemforder. OTOH, I bought a set of Meyle upper front strut mounts for my '95 E300D (not a W126, of course) and, although they came in a box that said "Made in Germany," on the plastic bag inside was a little sticker that said "China." This was mildly irritating. So far (2+ years) the Chinese mounts have held up but I'm keeping an eye on them.

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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