Thanks for the responses. I will try the fan first, since it is easier. Mark, so you removed the switch panel unit and took it apart and resoldered the joints? Can you be a little more specific with what you did and maybe give a few pointers if any? Thanks again!

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'86 420SE Euro
904 Midnight Blue, Gray Velour
Dad bought it new, now I own it.

"A Mercedes-Benz is like a fine wine, it only gets better with age."