I had issues with the autodimming side mirror on my 96 having the fluid go bad (turning brown). I found one that was "mostly clear" used, but after a year or so it was noticeably darker. Do you have a source for new/less browned mirrors, or perhaps another solution? It's a moot point on my part since I don't have the 96 anymore, but I'm still curious.
Unfortunately no source, have to find good used. I know a year or two ago you could still get new from Ford. I wish I would have picked one up.
The inside mirror being electrochromic is an option on the FN10s as well (can't remember if it's standard or not - my 98 has it but no dimming side mirror; my 96 had it but also the side dimming mirror - so I am thinking the autodimming side mirror requires the autodimming rearview mirror for its light sensor) The cars are prewired for it regardless of whether the mirror has it.