Secret decoder ring: https://www.macheforum.com/site/thr...ea-mach-e-tour-11-21-november.1985/post-58036Actually I'm with @jhalkias on this one. The manual explanation makes things absolutely not clear. The manual pictures makes things not clear in the slightest and the actual picture of the stalk shed zero light on it.
I think I'll be putting the MME out on the driveway during one of our afternoon deluges to figure this out.
Except ignore all the stuff about the back wiper.