**************.com has a booklet for sunroof service and repair on 65 to 85 models that may help you. Basically you open the roof halfway. pull the liner off and detach the sunroof from the cable. Then the steel section can be removed. While you are in there you can clean the tracks and remove and clean the cable tube. The booklet shows you how to do that. They have a kit for all of that. Your car may be a little different because it is the two way sunroof but you may be able to call them and ask about that.

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Tom Hughes
St. Louis
84 300SD
92 300D
86 300SDL