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Registered
2016 E400 4Matic Sedan
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610 Posts
Discussion Starter #1
Drove the car to the shop to check on A/C. Afterward, it refused to srart. Since I hear no Buzz from the fuel pump, I knew there is no fuel. A sparty and start confirmed the lack of fuel.

The shop tech say he could not get any power at the pump and he heard the relay kicked. But I just got no fuel to get the car going.

Questions: Is there a fuse that controls the fuel pumps? Is the one closest to the OVP the fuel pump relay? Could I just short the 7 and 8 with a wire and drive the car home?

Plaese help. [V]
 

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Registered
1988 560SEL sold:
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4,717 Posts
Sorry to hear your latest mishaps

Fuel pump relay part#, printed on the top (or maybe it was the side) of the unit is 003 545 25 05

It is the black box next to the OVP.

Pin #7 and #8 are labeled 87 and 30, respectively, on the relay unit. Whether you can short the terminals and drive the car I don't know.

Good luck.
 

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BenzWorld W126 & W201 Host
1988 420SE, 2002 C180 Kompressor, 200 ML320
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1,159 Posts
Pull the relay out and split it open carefully. In alot of bad fuel pump relays, you can easily fix them simply by resoldering dry or cracked joints.
 

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Registered
2016 E400 4Matic Sedan
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610 Posts
Discussion Starter #4
Reporting back with a good news

Shorted out #7 and #8 and I could hear the fuel coming in. So I pop the plastic cover open and saw a cracked joint right in the middle of the board. Had someone solded the joint and plug the unit back in. Voom, I drive the car back.

Looking at that cracked joint, however, made me feel so lucky. That thing could have broken at any time yet it did inside a garage. Can't image what could happen if FPR gave up while I were on highway.
 

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BenzWorld W126 & W201 Host
1988 420SE, 2002 C180 Kompressor, 200 ML320
Joined
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1,159 Posts
Glad to see your back on the road without having to part with your hard earned cash.[:)]
 
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