Turn the key on, but don't try starting the motor. Do you hear the fuel pump pressurizing? If not check the fuses, and replace the fuel pump fuse even if it looks good. Next, try the above test again and see if the pump spools up.
'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.