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

420SEL Stretch Limousine - Fuel Leak

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Old 05-17-2011, 01:46 AM
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420SEL Stretch Limousine
420SEL Stretch Limousine - Fuel Leak

Hi enthusiasts!

Just picked up my first MB and couldn't be happier. I've always had Japanese cars but it looks like Europeans are going to play a big part in my life now.

Pictures will definetely follow, will upload some by the end of the week. Right now though I am trying to work out why my engine bay smells like raw fuel. Essentially I've located the leak to a white/pink line that goes from somewhere underneath the fuel distributor to the left hand side breather pipe (which attaches to the left valve cover). It is leaking fuel and I've got no idea what it's for or how to stop it. Hopefully someone can come to my aid.

Thanks in advance.

BTW, the line I'm talking about is circled in red below:

Old 06-14-2011, 11:07 PM
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Here's the solution I had with my 1987 420SEL when I had a raw gas smell.

"It was suggested to check the EHA and sure enough, I could see a little seepage when the engine was running, so I replaced the EHA and 'O' rings and it greatly reduced the odor." (First and third picture.)

http://www.benzworld.org/forums/w126...revisited.html

Original post:
http://www.benzworld.org/forums/w126...ng-heater.html

Purpose of EHA valve:
http://www.benzworld.org/forums/w126...eha-valve.html

Last edited by Richard / E320; 06-14-2011 at 11:14 PM.

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