S-Class (W126) 1979-1991: 300 SE, 300 SEL, 380 SE, 380 SEL, 420 SEL, 500 SEL, 560 SEL, 360 SEC, 500 SEC, 580 SEC, 300 SD TURBODIESEL, 300 SDL TURBO, 350 SD TURBO, 350 SDL TURBO

Help! Leaky fuel

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Old Oct 25, 2014 | 12:22 AM
  #1  
whalefish's Avatar
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300SD Turbo
Help! Leaky fuel

Sorry if this is the wrong area to post this. This is my first time on this forum

Hey guys, first off i'll let you know I drive an '84 Mercedes 300SD Turbo Diesel.

this is embarrassing, but I drove off at the station with the pump still in my gas tank. It popped off at the metal coupler so I don't think there is damage at the gas station and no visible damage to my car.... But when I got home I saw a trail of liquid behind where I drove. I got underneath and saw that a rubber hose is the leaky culprit. The only problem is I can't find where the hell this thing would connect.... there is no place where it would reach. I have a picture: http://imgur.com/Q33K5ve

That is the passenger side wheel you are looking at, and the hose goes right up into the body of the car (right where my gas cap/tank is i'm assuming?) it was leaking blue fluid. I'm assuming that's my diesel fuel.
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Old Oct 28, 2014 | 08:55 PM
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davidb3265's Avatar
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1985 MB 300SD,1984 MB 190D
Fuel Leaking

I had my fuel tank out recently and I know that there is no support on the neck of the tank. Probably the neck is cracked and fuel is leaking into the body and out the drain. tank is not hard to get out after it is drained. The hose in your picture is definitely a body drain and the end pictured doesn't hook anywhere. Sorry
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Old Jan 10, 2015 | 11:15 AM
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Rmac58's Avatar
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From: central VA
1983 300 SD/1984 300 CD
That is the overflow line from the fuel inlet hose, it drains down where you describe.

More than likely that is doing it's job, especially if your cap is missing.
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