Sightlines to the rear are completely clear thanks to shingle-style headrests that nestle down onto the second- and third-row seatbacks. The side mirrors are on the small side, and reflections off the outboard vent trim rings can cloud the view to the sides. Forward visibility is good past somewhat thick windshield pillars. Our Mercedes-Benz GL450 came with a reversing camera and front parking sensors, making it easy to squeeze this big rig into tight spots.