Ok here goes, has anyone ever converted the older style seat switch to the newer switch? My passenger seat works intermittently, headrest doesn't work, but everything does when I connect 12v to it. I have had the switch apart 3 times with no success, The passenger switch doesn't seem to be available anywhere, I can buy drivers side all day long (not cheap) but it is available. I have a parts car with the new ones in it. I could swap harnesses but that seems drastic. Anyone?

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1987 300 TDT
1990 300 SEL