Also check the plastic piece of the sliding jaw. You'll need to run the window further down with the inner panel off. Possible the rivet/stud portion has come loose from the plastic and is pushing the window outward yet retaining enough pressure to run the glass up/down.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.