Okay, if confession is good for the soul....
About 35 years ago, give or take, I had a 72 Mercedes that wouldn't start. Don't remember why I thought it was the starter motor, but at any rate I proceeded to take it out. And what a pain it was. One of those tight places where the wrench would turn about 20 degrees at a time, and that bolt had a lot of threads on it!
Finally got it out, checked out and re-installed. Car still wouldn't start.
So, eventually, after about three days of fooling with it, I put the shift selector back in the Park mode, and she fired right up!