OK, the fuel pump from the yard was bad. I think they have another or I will try a third source today.

I disconnected the fuel line and ran a purge line to a gas can and jumped the fuel pump relay. Before I jumped it I measured 12V at the relay. Got nothing. So I need a good fuel pump.

I checked all the readings on my 420SEL and that pump is getting 13.3v at the pump and making noise. The other pump was getting 9v, making no noise and not moving fuel.

Not sure if I have a voltage prob to the fuel pump, but 9v seems low in relation to the 13.3v on the 420sel???????????????

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1981 300TD
2005 C55
2004 E500
1999 ML430
1992 400E
1998 C43
2001 SL500
1988 300SEL
1986 190E 16V
1991 190E 2.6