I've had two - my mechanic has four in his shop currently. I'm starting to wonder if this is related to the new ULSD.

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- Brian


1989 500SEL Euro
1966 250SE Cabriolet
1958 BMW Isetta 600

The delivery valve seals in my '98 let loose after my second confirmed tank of ULSD was run through it a couple of weeks ago...to me it is more than a coincidence.

Still, the car has 140K miles on it and is probably due for having them changed but I strongly suspect ULSD pushed them over the edge.

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz

I had two fuel leaks a couple of months ago....replaced injector seals and something else (I forget what). Also had oil leak (front crank seal) going at same time...it was quite a mess!

Makes me wonder what in fuel system will give way next.

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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

my delivery valve seals have been seeping for at least two years- very little though, as in pump is wet after a week of driving

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1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350

I too have a leak. 11+ year old car, maybe just coincidence????? Jay

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Thank you, Jay
83MB 300D 241K "The silver coffin"
10 Prius lll 1K
95 MB E300D 120K Mable
02 Saab 9-5 Areo 131K
Cannondale SR500
www.thecornerstonefamily.org/

You might want to clarify what type of fuel we are running. I am running no less than 25% biodiesel. Sometimes I run as much as 50% biodiesel, 25% filtered used cooking oil, with 25% ULSD.

My fuel lines in the engine compartment were replaced by the PO with standard new fuel lines. I replaced the injector return lines with viton. The o-rings on my spin on filter are viton. I have a new viton o-ring for my tank screen, but have not installed it yet. (I sell these on my website, www.fryerpower.com)

The lines back at the tank have not been touched. The injector pump has not been touched.

No leaks so far.

-Jim

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1995 S350D, Green with black leather interior.
Bought January 2008 w/ 233,xxx miles.
I did 22,000 miles during the first year of ownership.

I won't use biodiesel.

__________________
- Brian


1989 500SEL Euro
1966 250SE Cabriolet
1958 BMW Isetta 600

I've got a ladyfriend with a '95 E300 with 200k+ miles. Leaks have sprung up within the past couple months from around the injector nozzles at the IP.

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Jim

POS,

That's a shame, but its your choice.

You are probably not open to replacing the buna o-rings with viton ones either since MB did not spec them for your car 11 years ago.

-Jim

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1995 S350D, Green with black leather interior.
Bought January 2008 w/ 233,xxx miles.
I did 22,000 miles during the first year of ownership.

The little fuel return lines on the injectors were leaking when I took delivery of a 1987 300DT last month. My mechanic replaced the lines; end of leak. Doubt that it was related to ULSD but rather poor maintenance by the PO. I'll switch this one to biodiesel soon and add it to my signature. It is to be my wife's daily driver.

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

Don't be so quick to judge. Not all of you biodiesel guys are smarter than the rest of us.

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- Brian


1989 500SEL Euro
1966 250SE Cabriolet
1958 BMW Isetta 600

I know mine's no 124 but a '99 210 is close enough

After a year on B100 the shutoff solenoid o-ring gave in with half a tank of ULSD (happened right away, fuel leaking on the garage floor)....
Seriously, no problems at all on biodiesel, i swear the engine is quieter too.

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99 E300 TD -- sold
01 540i 6 spd

(Edit: I guess his and he should be replaced with your and you. )

Hey, it's his option to do what he wants to his car. I'm not going to beat him up over it. He just seems to fall into the group that believes that if it was meant to be it would have been issued by Mercedes Benz. I fall into the group that is willing to try new things and take responsability for my own mistakes if I end up screwing up my car/engine. I just think it is a bit harsh to throw down the gauntlet with a statement like "I won't use biodiesel." It carries a connotation that the person making the statement views biodiesel as a curse and would never sully their fuel system with the evil Methlesters.

Some people are traditionalist. Some people are early adopters/tinkerers.

We all have our thing. I'm into biodiesel more because I think it is cool as heck that it can be done. I was making biodiesel for 6 months before I ever bought a diesel car. I had 200 gallons of biodiesel in barrels ready to be used by the time I had the car!

-Jim

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1995 S350D, Green with black leather interior.
Bought January 2008 w/ 233,xxx miles.
I did 22,000 miles during the first year of ownership.

If I remember right that o-ring is a known weak point, but biodiesel surely helped it on to an early grave. Replace it with one made of viton and you will not have an issue with biodiesel or ULSD.

-Jim

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1995 S350D, Green with black leather interior.
Bought January 2008 w/ 233,xxx miles.
I did 22,000 miles during the first year of ownership.

Its replacement is viton, a year ago when i started running biodiesel in the car i made sure to replace all the rubber fuel components with viton, that o-ring probably wasn't replaced though 'cause it's "buried" inside the IP.

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99 E300 TD -- sold
01 540i 6 spd