Other threads you've started on this same subject:

http://www.peachparts.com/shopforum/vintage-mercedes/394174-76-280c-114073-chassis-no-power-windows.html
http://www.peachparts.com/shopforum/vintage-mercedes/393923-76-280c-power-window-regulater.html
http://www.peachparts.com/shopforum/vintage-mercedes/393876-multi-meter-reading-power-window-switch.html
http://www.peachparts.com/shopforum/vintage-mercedes/393858-76-mercedes-280c-power-window-switch-wiring.html
http://www.peachparts.com/shopforum/vintage-mercedes/393789-76-mercedes-280c-chassis-ground-locatations.html
http://www.peachparts.com/shopforum/vintage-mercedes/393670-76-280c-power-windows-no-power.html
http://www.peachparts.com/shopforum/vintage-mercedes/393329-1976-280c-no-power-powerwindows.html

Pick a thread, stay with it until you've solved the problem. Starting a new thread every couple days is going to get you nowhere fast.

__________________
Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)