You got it. Its a '90 300E.
Thanks for responding. I was hoping you'd jump in on this at some point. The original thread was 'Huge Flat Spot", started over a week ago.
I'd like to be making better progress on this, but work keeps getting in the way...
I have also run across a Service Bulliten mentioning issues at the Control Unit plug, solder joints, shorts to shields, all manner of horrors.
Do you agree that the diagnostic trail points in this direction?
Did the '90 year have issues with engine harness's?
Mark