I recommend you go to a really good window tint shop and have our windshield tinted with UV shield tint. You want to reduce UV rays coming in the huge front windshield but not tint the windshield (not making it darker).
That gigantic windshield, along with the matching gigantic side windows, is one of our favorite things about a Sprinter. It really pays off in the mountain scenery, where the vistas they make possible are about as good as you can get looking out the front of any vehicle.Yeah, this stuff looks very interesting for that monstrous, tour-bus style windshield on the Sprinter.