Yup, the auto dimmer. Cars like the Range Rover and high end Jeeps have their outside mirrors like this as well. They are awesome. I have had these in my Infinitis forever, but I didn't get a Touring Z, so I have the manual "flipper" mirror. It's amazing how such small things can make such a big difference.
Oh, and by the way, if you have Homelink built in, that's the pride of Milwaukee! Johnson Controls! I actually wonder if they make that whole dimmer/opener assembly here. I think they do. Go BrewTown! (A little Milwaukee work sitting on your window.)
