Unless the have broken off, they should be there. They are very hard to see with the fill panel under the lights in place. To see them with the fill panel in place you have to get your head up in there from behind, and the easiest way to get the fill panel out is by removing the side marker lights (give access to the 8mm [or 6mm] bolt at the fender joint).
'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.