1. You need to have the setting turned on in settings area.
2. You need to set the tilt on your mirrors as well to what degree you want sometimes. In reverse with setting on, go to left mirror and set, right mirror and set, then you should be good. They should return back to normal when in Drive. Note, I believe there was the option to have which one you want tilt only by having that side selected on the door - e.g. if you leave the right mirror selected, when going into reverse, it will be the one that tilts down to your setting. Same for left. Of course the middle button is fold both. This is kinda the standard behavior in most luxury cars with the tilt.