I'm running a test on wheel bearing adjustment on my 85 300SD. I have set one wheel the book way, with micrometer, the other wheel I set the american way, snug up with a wrench then loosen and then tighten using one finger and thumb. So far no difference but only have about 3000 miles. The reason I am doing this is because the MB wheel bearings I use are made by an american company for many different applications. If the bearing goes into an american car guess how the mechanic does the adjustment? I don't believe the bearing knows when it's in an MB and thus the micrometer adjustment, while very accurate, is not necessary. If my assumption about the bearing knowing which car it's in is wrong please correct me.

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85 300 SD ~ 115K
82 500 SEC Euro ??K
78 450SL 164K