This car has the fuel pump relay built into the MAS controller. The MAS controller is GOOD, having been swapped out with a known good unit from my other car.

If I remember right, this car has the dual fuel pump package. Seems unlikely that both pumps would fail, but there is no fuel pressure at all.

Before I go under the car (since it won't start and I can't even drive it up on my ramps) are there any usual suspects here? OVP? ECU?

Thanks all!

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2012 E350
2006 Callaway SC560

Reall common for both pumps to be out. I presume because they will either run on one till it finally dies or because the act of running with one deficient takes out the second. Other than MAS it is not real likely to be anything else electrical OVP isn't an issue to the FP. Of course the test is to view a wiring diagram, veriffy the MAS 12v input, jump it to the MAS FP output with a fused jumper, and verify 12v at the pumps with suitable ground.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician

Steve,

While that was not what I wanted to hear, it was what I was afraid I'd hear.

All my wiring diagrams are for the older version with the separate FP relay but I should be able to find my way thru it.

Thanks for the response!

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2012 E350
2006 Callaway SC560