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  #1  
Old 02-12-2018, 06:33 PM
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Fuel lines

All,

The good news is I found the fuel line that was leaking. It seems to be the main line coming from a metal line and turns into a rubber fuel line that goes to the fuel filter. The bad news is there are two more rubber fuel lines under there. Any idea what the other two are for and the sizes? I figure if I'm going to get soaked in diesel I may as well replace all three.

1995 E300D with 290K on it.

Thanks!

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1960 190D (college car), gone
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2004 Infiniti G35 (spouse mobile)
2003 Nissan Frontier Crew Cab
2007 Jeep Grand Cherokee Overland 3.0L MB diesel, 170K
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  #2  
Old 02-14-2018, 01:31 PM
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I don't know your car.

In my 1984 & 1985 300D's, 5/16" fuel hose fits. I replace w/ Goodyear Barricade, which is rated for bio-diesel (toughest fuel) and can be bought by the foot at NAPA. The return hose is a special swollen "cigarette" hose. For injector returns, I use 1/8" Viton hose (ebay).
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  #3  
Old 02-15-2018, 12:07 AM
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Thanks!

I'll check with NAPA this weekend. I'm the second owner so I suspect they are the stock lines.
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1960 190D (college car), gone
1995 E300D, 300 k
2004 Infiniti G35 (spouse mobile)
2003 Nissan Frontier Crew Cab
2007 Jeep Grand Cherokee Overland 3.0L MB diesel, 170K
1978 GMC Classic Motor Home
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  #4  
Old 02-15-2018, 07:38 AM
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Location: Gastonia, NC
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E300 Fuel Lines

You may already know this, but the fuel lines on a Ď95 E300 are unlike the fuel lines of any of its Mercedes diesel predecessors. I canít recall EVERY fuel line thatís hidden up under the intake, but 99% are plastic lines with special fitted o-ring clips that are notorious for drawing air into the fuel. I own a Ď95 E300, but I canít remember how the metal line from the tank terminates.
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  #5  
Old 02-15-2018, 09:19 AM
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While the above is true in respect to the clip fitting/o-ring setup on these om606.910/912/etc...

They do still have a rubber fuel line coming off the steel hardlines that run the length of the frame to the fuel tank, one feed (goes to the fuel heater on the head) and one return(from the fuel filter block)
As I recall, on the w210(perhaps different than your w124), feed is a 3/8 and return is 5/16...
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Old 02-15-2018, 09:24 AM
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Thanks!

Thanks for the clarification. I couldnít remember how the feed line was designed. I replaced all the lines in mine over two years ago. Iíve slept since then. LOL
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  #7  
Old 02-15-2018, 02:29 PM
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Quote:
Originally Posted by bigpanda16 View Post
As I recall, on the w210(perhaps different than your w124), feed is a 3/8 and return is 5/16...
MB does not use inch sized hoses. Everything is metric. For the fuel hoses in question, IIRC its 8mm ID.
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Old 02-15-2018, 05:45 PM
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Quote:
Originally Posted by torsionbar View Post
MB does not use inch sized hoses. Everything is metric. For the fuel hoses in question, IIRC its 8mm ID.
I suggest downloading the "convert.exe" program (Josh Madison)
8 mmID = 0.315" = 5.04/16" ID = "close enough for rubber".

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