I got the new fuel pump relay for my 560 sel from fastlane and it cured the problem for a while. I drove it once to the gas station, and I ran it a few other times (waiting for paperwork to clear up registration problems), and the last time I ran it, it died and never started back up-fuel pump out again. I jumped out the fp relay and it started up. Do the new relays have reliability problems as well? What now? Thanks,
Chris

No, usually not. It sounds like your fuel pump(s) could be drawing too many amps and blowing the relay like a fuse.

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Benzmac:
Donnie Drummonds
ASE CERTIFIED MASTER AUTO TECHNICIAN
MERCEDES SPECIALIST 11 YRS

Also the ignition module must send a VOLTAGE signal to the TD pin on the fuel pump relay so that the relay knows that the engine is running.

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MERCEDES Benz Master Guild Technician (6 TIMES)
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44 years foreign automotive repair
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190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

I have got to go with Benzmac on this one. That was the problem I had with my 500SEL. Take it from me, do not buy cheap crap to replace the fuel system components with. I repeated that montra as I was replacing my third fuel pump.

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R. Downs
1985 500SEL (260,000 miles) SOLD!
1974 280 SOLD!
1994 Volvo 850 Turbo Wagon (Yuppie Ice Sled)

"I know I have a Benz and they know it too." If you start bragging about it or shoving in people's face, you then become a Wally; especially to the girls.