So a few years ago I owned an Infiniti FX35 that had one of those auto-dimming rear view mirrors with the built in Homelink buttons. Homelink, for my purposes, was used to open and close my garage door(s) - though you can apparently also use it to turn on lights in the house - I didn't look into that because I can turn them on myself
So I've spent a lot of time yesterday looking into the possibility of adding Homelink in some fashion to my car. There are a ton of the mirrors available, they're mostly made by the same company for different auto applications, and Ford sells new ones (for quite a markup) on their OEM parts sites. The concerning factor is it states that it's not for use in MyFordTouch/SYNC cars. No reason given, and in probably hour(s) of searching, I found no reason why. I found sites where people retrofitted Homelink mirrors/buttons to their Focus and Fusions, but not sure if they had MFT/SYNC in them.
I also saw that some older Focus had the option of the Homelink buttons on their drivers side visors. I saw one "how to" where I guy swapped his out in his Focus (2010 I think) and it worked fine (he bought an OEM visor with the buttons new from a Ford supplier). Again - not sure if he had MFT/SYNC. I found the ford/Focus OEM visors with the buttons, but couldn't tell what color they were. Nor if they'd fit/install properly in the ST.
Does anyone know anything about WHY Homelink isn't supposed to go in a MFT/SYNC car? I know Ford has some brand of "Universal Garage Door Opener" they put in with their sunroof on the Fusion.