85 300SD Sounds like wheel bearing noise but I replaced both and no change in noise. Also does not change with load - swerving side to side- like previous wheel bearing problem on the 85 380SE. Sound seems to be from front, not center, but I just found out about the driveshaft bearing. Could that be it?

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