From a quick visual inspection, it looks as though the previous owner pulled it off. It doesn't seem tight to the window and the edges have maybe a 1/2 cm gap between the metal door. The front doors seem a lot tighter.
I'll post what I find!
BTW: Off from classes for a month, time to putz!
(New addition: Driving a new "old" car from Pittsburgh to Madison next Monday! -- not a MB though.