I've been testing the mirror-dipping feature myself, and from what I've experienced, it seems to be primarily focused on the passenger-side mirror when you shift into reverse. This is pretty standard for most cars, as it helps you see the curb and avoid scraping your wheels when parking. I haven't noticed the driver-side mirror dipping as significantly if at all, when reversing. It might adjust slightly, but the main dipping action seems to be on the passenger side. So far, it looks like just the passenger-side mirror gets the full dip.