Under seat air vent cleaning?
 

My 1991 300D has junk rolling around in the air vents that are under the seats. I cannot figure out how to get the junk out. It seems strange that Mercedes didn’t think to put a screen of some kind over these to keep things out.
I can see in the vents using a small mirror. There are a few parts from what looks like a toy , a pencil and some coins. I just can’t find a way to get the stuff out.
Perhaps hang the car by the front bumper and hope the stuff comes out?