The Audi A8's main visibility bugaboo is a set of rear headrests that don't collapse or nest into the rear seatbacks. Furthermore, they don't power down when not in use. Thus, they block significant portions of the rear window. Additionally, the side mirrors are somewhat small, though they do include a defogging system that quickly clears the glass. Our test car had Audi's advanced parking system, a rear-mounted camera that shows what's behind the A8 as well as trajectory lines displaying the path the car will take. Bi-xenon adaptive headlights with high-pressure washers also improve visibility on dark, snowy nights.