Looks like I'm scre@%ed. I took a better look at the pictures (No.7 and 8) and besides not finding the rear section of the shade (I think...), I noticed that the thin vented piece placed between the two sun shade covers has been pushed back and twisted, likely having fallen off from the right rail (see what part I mean in the image below). Not the best the way to begin a new ownership of an X5...