1983 280sl fuel pump relay HELP!!! - Mercedes-Benz Forum
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post #1 of 16 (permalink) Old 04-13-2017, 10:04 PM Thread Starter
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1983 280sl fuel pump relay HELP!!!

Hi,

Took my cousins '83 280SL on a drive today and after driving for about an hour the car just died. At first I thought maybe I ran out of gas but that wasnt the case. From what I can find online it seems to be the fuel pump relay. I have a 1980 280SLC I was thinking about swapping relays to see if that is the solution however I cant figure out where the relay is one either car. If anyone can help me out that would be great!!!
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post #2 of 16 (permalink) Old 04-14-2017, 05:06 AM
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On the '83 the fuel pump relay is behind the glove box. Remove the liner and look for a silver box on the right.

Not sure about the '80. I think it is the top left relay of the relays above the fuses.
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post #3 of 16 (permalink) Old 04-15-2017, 05:43 AM
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On my 83 280 SL....the FPR is above the fuse box....you will have to remove the panel to get to it.

It is a BLACK relay part number 001 545 43 05.
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post #4 of 16 (permalink) Old 04-15-2017, 06:05 AM
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Thanks Nobby. That's what I get for assuming it would be the same as my '84 500SL and the North America model 380SL.
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post #5 of 16 (permalink) Old 04-15-2017, 06:37 AM
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Thanks Nobby. That's what I get for assuming it would be the same as my '84 500SL and the North America model 380SL.
Meh.

There are more than one place to look for relays across the models......more information is better than less.

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post #6 of 16 (permalink) Old 04-16-2017, 12:54 PM Thread Starter
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Meh.

There are more than one place to look for relays across the models......more information is better than less.
It was behind the glove box. Same part number as what you sent. Still can't figure out what's wrong. I have a test light and tested the wires going to the fuel pump and the fuel pump is getting power so I assume the relay is working then. My only other guess is the fuel pump we out. As mentioned the car was driving fine and just died. It has spark so it must be a fuel issue. The car did sit for a number of years. Any other ideas what it might be or is it most likely a bad fuel pump?
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post #7 of 16 (permalink) Old 04-17-2017, 04:43 PM
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Try applying 12v to the pump terminals.
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post #8 of 16 (permalink) Old 04-17-2017, 05:00 PM
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Make sure NOT TO LEAN ON THE GLOVE BOX LATCH while working there.
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post #9 of 16 (permalink) Old 06-17-2019, 12:34 PM
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Mark appreciate this is a very old thread but did you eventually find the cause?

I seems to have the same issue on a 83 280sl.
I have spark to the cylinders
FPR seems fine
Fuel is delivered to the injectors

Car turns over but wont fire.
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post #10 of 16 (permalink) Old 06-18-2019, 05:47 AM
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I wondered about this when my FPR went out. What else could cause that? I came up with crank position sensor -- if it thinks it isn't turning it shuts down the pumps. The new relay seemed to fix it....
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