"Determine" is too big a word for me . . . I "figured out" it was the hub bushing by replacing it and the squeak went away! It was pretty much an educated guess. I had advice from GSXR and others, and I was able to closely inspect the other bushings -- they looked good (the hub bushing is hard to see). Finally, I think a failed bushing in another link including the inner LCA bushing would make a different noise -- the hub bushing's noise was definitely metallic. As a final note, the hub bushing really isn't a "bushing," it's more of a "flex joint."

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