trying to remove a plastic trim, there's a flat bolt instead of a screw!!!
 

I'm trying to remove the plastic trim on the trunk lid on my 2001 W210. This thing is held on by 3 screws.. but on my car, I see 2 screws on the ends, but in the middle there is a flat bolt, with nothing on the head to turn it, instead of a screw!! therefore i cannot get this sucka off. how the heck am i supposed to remove this thing????? argh