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380 SL 1983
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Discussion Starter #1
Attached is picture of a device next to pasenger side rear wheel on 83' SL380.

I have no idea what it is and it is making an loud buzzing noise.

Can anyone explain the device and what it is I am hearing?

Your help is greatly appreciated.
 

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1973 450SL 2004 E320 4Matic Wagon 2019 Jeep Grand Cherokee
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Fuel pump

jkoch said:
Attached is picture of a device next to pasenger side rear wheel on 83' SL380.

I have no idea what it is and it is making an loud buzzing noise.

Can anyone explain the device and what it is I am hearing?

Your help is greatly appreciated.
That's your fuel pump and you are going to need to replace it yesterday unless you have AAA to get home.
 

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380 SL 1983
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Discussion Starter #5
Thanks for the help. I will get on it now.

So the two devices ohn top of each other are the fuel pump and fuel filter? Talk to me about the fuel line and what I need to look for/order. Your help is greatly appreciated!!!
 

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Forum Administrator , RC Colas® & Moon Pies®
1981 380SL 151K: 2005 S500 116K
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The pump is the more slender tube on the bottom. The filter is the big silver canister on the top. I replaced my pump and filter and the gas lines were in very good condition for a 25 year old car, so I kept them. Others here were not so fortunate so you need to squeeze and pinch and decide for yourself if you want to take a chance or replace them.

Be sure to take the car for a long drive to drain as much fuel as possible. When you disconnect the pump from the tank line, gravity will give you a gas bath you won't soon forget. There are several threads you can search for that detail what to do. I think Nobby has a lengthy dissertation on the subject.
 

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jkoch said:
Thanks for the help. I will get on it now.

So the two devices ohn top of each other are the fuel pump and fuel filter? Talk to me about the fuel line and what I need to look for/order. Your help is greatly appreciated!!!
At the top of the assembly is the fuel reservior/accumulator.
Depending on your mileage and service history you might want to look at it also.
Happy motoring.
 

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2010 Mercury Milan Hybrid, 1993 BMW 325i convertible
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BenzToy said:
Depending on your mileage and service history you might want to look at it also.
And while you're working on the fuel delivery system, you might as well replace the fuel tank. It's probably all sludged up with crap anyway. And it wouldn't be bad to replace the fuel distributor, just as preventive maintenance. And the injectors, seals and cups. Remember to only go with MB OEM parts from the dealer, to make sure you're getting the real deal.
 

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You shouldn't pay attention to any of what I just wrote, by the way. You'd be spending thousands of dollars for no good reason.
 

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ScottinSoCal said:
And while you're working on the fuel delivery system, you might as well replace the fuel tank. It's probably all sludged up with crap anyway. And it wouldn't be bad to replace the fuel distributor, just as preventive maintenance. And the injectors, seals and cups. Remember to only go with MB OEM parts from the dealer, to make sure you're getting the real deal.
Did Scott have a bad day, or what?
 

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BenzToy said:
Did Scott have a bad day, or what?
Scott's having a bad week.
 

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380 SL 1983
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Discussion Starter #12
Thanks for the help.

thanks for your support.
Is the accumulator and the Filter the same thing? Are the two devices I attached in the picture the fuel pump and Filter? I hope so as that is what I am ordering.

Your help is appreciated as always.
 

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Digmenow said:
The pump is the more slender tube on the bottom. The filter is the big silver canister on the top. I replaced my pump and filter and the gas lines were in very good condition for a 25 year old car, so I kept them. Others here were not so fortunate so you need to squeeze and pinch and decide for yourself if you want to take a chance or replace them.

Be sure to take the car for a long drive to drain as much fuel as possible. When you disconnect the pump from the tank line, gravity will give you a gas bath you won't soon forget. There are several threads you can search for that detail what to do. I think Nobby has a lengthy dissertation on the subject.
To test if you need a new hose from the tank to the damper, apply slight pressure to the hose, and observe for sweating. If it sweats at all, you will need to replace that hose, the leftover from that hose is for the damper to fuel pump connection. I would say if you were going to replace that hose, a fuel tank screen would be called for. You can investigate the condition of your tank somewhat with the screen removed. A clean fuel delivery system is condusive to happy motoring.
As dig said, drive and siphon as much fuel as possible before you start. Buckets and pans are handy. Have fun.
 
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