Very small dab of the steel jb weld just on the edge. Harden with a heat gun to fix into place then let it cure. If you need to get the switch off, a small flat head or razor should work to pry it off. I did have the issue with the glue in the summer, but on top of the glue gun, I use a small bit of super glue, which I do not recommend. It works great, but I went through 2 switches because it ran and jammed up the switch. By the way, glad to see you still have the 201, hadn't seen you on here in a while.

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1990 190E 3.0L