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  #1  
Old 05-24-2007, 10:24 AM
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replacing Fuel Accumulator - 126

In the 126 CD , when replacing the accumulator you are told to remove the metal Fuel Line(#5) that connect the fuel pump, filter & accumulator. Do you indeed need to do that if only replacing the Accumulator ?
thanks.

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Old 05-24-2007, 10:54 AM
Mike Murrell's Avatar
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In the photo, #5 is the fuel line and it connects to the accumulator which is either #2 or #57, depending on how you look at it. For sure, the line has to come off.

I went thru is last spring when my 126 300-SELs fuel pump gave up the ghost.

While I was at it, I replaced virtually everything in the area: pump, accum, filter, hoses, tank strainer, etc.

There was a "special" hose about a foot long that I had to order from an MB dealer. None of the WEB sellers showed it in their online catalogs. I want to say it's #35(black hose) in the photo. Other types of hose just didn't fit right.
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1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"
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Old 05-24-2007, 11:54 AM
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Hi Mike,

That seems so odd that the metal line needs to come off - Is it a rigid fitting that connects that metal fuel line to the accumulator, rather than a rotating one ?
The reason I ask specifically about the metal line , is that a few months ago I too replaced all the flexible fuel lines coming and going to and from the Tank as well as the tank screen. So I want to avoid taking apart the items that I've replaced already. The only thing ( mistake )I did not do was the accumulator itself, which I now need to do. I also have the "special hose" on hand as well. What do you think ?
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Old 05-24-2007, 12:08 PM
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Look at the north end of fuel line #5. You'll see a fitting that screws on the a stud/post on the accumulator - below the #57.

If the accumulator is all that's to be removed, you might get away with just removing the connection on the north end of line #5 and not the entire line.

What I'm not sure of is just how far back you'll be able to pull the fuel line connection once it's been loosened from it's accum. connection. If you can't pull back far enough, you might be able to loosen the accum. mount and shift it in the opposite direction.
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1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"
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Old 05-24-2007, 12:10 PM
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I replaced mine too. It cured my hard hot start problem after chasing that for 6mo. Ended up with a new fuel accum with pump and filter to boot. Not a hard job. Make sure you have a pair of needle-nose visegrips or you will get a gas shower. Ditto with above too.
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Old 05-24-2007, 01:20 PM
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OK, that is what I wanted to hear.
And I do have the little thingies that clamp on the fuel lines - To prevent the expensive gas shower you are talking about....Thank you very much !

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