Paulridge,
Check with your MB dealership. Part #s are (there are several screws, and I am not sure which you are talking about).
113 984 13 31 Screw, retaining rail to main bow (need 2)
113 984 23 31 Screw (need 2)
000933 006 103 Screw (need 4)
000933 008 115 Screw, folding frame assembly to bracket (need 4)
Good luck
Robert Hyatt
Williamsburg, VA.
1970 280SL, Red on Silver,4-speed, Euro spec; 1999 C230 Kompresser Sport, Black on Black; 1990 Miata, Black on Red, 5 Speed