@tesla while driving our M3 on a cloudy but perfectly dry day the windshield wipers began to operate automatically, sporadically. I could not turn them off. Ideas ?

Auto wipers are garbage. You can switch from auto to off, if they bother you, but the car will switch them back to auto when you enable autopilot.

Try cleaning the glass in front of the main camera stack really well. That can help.

On our Model Y the whipers start whiping like crazy sometimes when its especially sunny. I suspect residues of dirt on the camera facing the sky which distorts the light so the car thinks its water on the wind shield. What a bad idea to use a camera to detect water when there are rain sensors available since decades and those work perfectly fine.

Long story short: auto mode is rubbish.

Its gotten really bad the last couple of betas, mine is wiping dry on pretty much every drive now.

I've taken to yanking the wheel for a disconnect then reporting 'accident' or 'hit pedestrian' as the comment so maybe they will surface when they filter out problems they don't care about.