i would like to attempt to repair my fuel sender the two little fine wires are broken i would need to know the type wires they are and maybe some direction on replacing them any help would be appericated , thanks James

Waste of time. Spend the $60 and just do it once. I've "fixed" the sender three times in my W126 by soldering the wires and the next time it breaks I'm replacing it.

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“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now

Welcome to the forum! Diesel Discussion is where the cool guys hang out .

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"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes

1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."

who will repair it and how do they do it for 60.00

They get some 22 or 24 gauge wire and rerun it or splice it in where the original wire is broken. Most smart ones use something like a 30 watt soldering iron.

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1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."

There are 3 wires that run the length of the tube.

Only the "low fuel" contact wire is actual copper. The others are NiCr resistance wire with a specific resistance per length. The slider moves up and down on these 2 wires creating a connection between them.

At the top of the tube there is a small amount of wire -> lower resistance -> higher voltage applied to the gauge.

At the bottom of the tube there is a larger amount of wire -> higher resistance -> lower voltage applied to the gauge.

Standard 22 or 24 ga copper will not work for these 2 wires, the gauge will just pin high all the time.

Best bet - visit a wrecking yard or eBay.

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The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)

both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech

Thanks jay bob

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1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."

Go to a junkyard near you. Look for any W126 S/EL/D/L model. Remove their fuel/gas sender unit and install in yours. They are the same. I replaced mine with same from a 420SEL. Problem solved.

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1987 300SDL 314K mi, counting; #22 Head
1999 E300Turbo 405K original miles
1997 E320 180K mi (Son's)
2002 ML320 (Son's)
1998 S320 140K mi (Son's) sold
1985 300SD 311K mi
1984 300D 324K mi (killed by a hit-n-run turd)
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