Originally Posted by Oldstrain

Well, all, after much fussing and purchasing of electronic modules ending in “CM”, I decided to focus on the limit switch (lower) which I determined was faulty. I looked at limit switches on Amazon and selected one by eyeball only that seemed proximately the same as the faulty one on the crossfire. When it arrived, it was slightly larger than OEM, but close enough to fit within the SFF (Standard Fudge Factor) provided by Mercedes.
It was a 3 wire switch allowing for both NO and NC circuits but some quick research on this forum confirmed it should be wired NO. I wired in the switch, secured it with a drop of Gorilla Glue, and Voila!, I had a working spoiler. It even beeps when I lower it with the console override. Best yet, it raised at 62 mph and lowered at 39 mph. That has never happened before.

Now, everything I have blabbered about here was covered by another member a few years back. He included several very good pictures.

Many thanks to all of you.