The windows of this car are tinted, so they provide some privacy. However, when staying actually in it overnight, it is important to have some kind of curtain or blind. At Wilco I saw rolling blinds, and I got a blue one with 60 cm width. Originally I wanted to use it for one of the side windows, but then it also fits nicely at the rear window on the barn door, and so I affixed it there. I was able to drill small screw holes into the metal next to the window, so that the top mechanism for holding the blind could be attached. The picture below shows the blind rolled down at the rear door.