Vantech Black Aluminum Cargo Rack System Mercedes Sprinter 2007-current High Roof / 170" WB / Extended Model H3005DD07BVantech Black Aluminum Cargo Rack System Mercedes Sprinter 2007 current High Roof 170" WB Extended Model H3005DD07B The DD configuration utilizes a 40 degree angled faceplate for both the front and rear end. The angled front faceplate acts as a wind foil, and reduces drag as well as wind noise when traveling. It also channels air over and around any low profile cargo like ladders and folding tents. The rear angled faceplate reduces drag and wind noise