I have this same problem, but can't find any loose linkages while rear end is jacked up. Should I check the linkages when full weight is on the rear suspension instead?
Also, what about the linkages fails? The bushing connector that connects it to the control arm?
I also may be checking the wrong part. The piece i'm looking at is plastic, and connects to a very small bar that runs across the car to the other side. Is this the sway bar? The linkage runs parallel to the rear shock.
Thanks for any help!
'91 300E 199k