Back from the junkyard. Screwdriver worked like a charm. Removed a sunroof from a 1985 500 SEL and will install it on my 87 300SDL. Much simpler than mine and I will avoid using those side brackets that constantly break. But that would be another thread :-).
JamesDean, thanks for the info about the Eastwood spray. It seems to be a great product. I just noticed your signature referencing Cruise Control problems. I will probably contact you when I am ready to tackle that.

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87 300SDL
92 300D 2.5 TD