I replaced the auto dimming mirror in my 2013 with a new OEM standard mirror for $34. Purchased online with fordparts.com and picked up at my local dealer. Learned how to remove the mirror by watching youtube video:
I made a removal tool out of an old screwdriver by grinding the blade width down with a Dremel tool and then clamped it in a vice to bend it at about a 30 degree angle. Went in at the top of the mirror mount and it pried off easily. Just make sure you get the tip of the screwdriver between the mirror bracket and the mount that is bonded to the windshield. The video shows this quite well.
The 2013 model no longer has the Sync mic in the mirror, so replacing it with the standard mirror only costs the auto dimming function, which I found to be less than acceptable. In addition, mine was vibrating so bad the image was just a blur most of the time and buzzed and/or rattle over every tiny bump in the road. I know I probably could have gotten it replaced under warranty, but that would have required a trip to the dealer (at least 3 or 4 hours for me, since my dealer is 45 minutes away) and then no guarantee it wouldn't just start buzzing again in a few months. The new standard mirror is rock solid (no blurring) as it is much lighter and when I flip the switch to dim, it actually dims enough so the headlights behind me aren't distracting anymore.
Anyway, it is something easily fixed for very little cost (if you have a 2013).