tarlan

I have about 110K miles on my '07 C280. The night before Thanksgiving the car was driving fine. The morning, I started it and drove out of the garage but it suddenly stopped. I tried restarting it and after several attempts it turned on, unsmooth, but long enough to drive back into the garage and stopped. It does not start anymore (it does crank). I checked the fuel pressure; there is no pressure. Fuel pump fuse (#4) and relay A (in the trunk) check out fine. The next logical step, I think is to check the voltage at the fuel pump header. The 5 pin header on the left hand pump behind the driver does not get any voltage on any of the pins with the ignition ON (all indicator lights on). Can anyone confirm if the two thicker wires (2 and 5) on this header are the pump power wires? Is it safe to connect power to these to see if the pump works? Does anyone have a diagram for the header of this pump and the one on the passenger side (both inside the tank)?
Does anyone have a wiring diagram so that I can trace these wires? Thanks for any help/suggestions.