Thanks for the great responses.

A couple of follow up questions

- Why does the diagram show that the kickdown switch connection to be an output instead of an input?

- The flakiness might have started after I changed the main fuel filter and spilled some fuel on the clutch. What can I use to clean the clutch surfaces? Is brake parts cleaner safe?

Thanks,
Sixto
91 300SE
87 300SDL
83 300SD