I've got a 1995 300 D with 50,000 miles on it and I love it; I've had it about three years and haven't driven it much. Now I use it all the time.

Lately, when I go on the freeway (fully warmed up) and get to about 55, the car lurches and kinda feels like I'm going to run out of fuel. I think it's getting worse and it doesn't happen all the time. I seems to go away after about 30 seconds and/or when I speed up.

I always run 95/5 diesel/bio in it though it has been converted to biodiesel and I've driven with pure bio in the past.

I know nothing about doing any sort of repairs or diagnostics, so I'm looking for info I can convey to the repair shop.

Thanks in advance for any advice you might have.

Welcome to PeachParts timpdx,

Now, you don't convert a car to run on biodiesel. However, lots of people wrongly use the terms biodiesel and Waste Vegetable Oil interchangeably, and I'm thinking this may be what you're doing. Has your car been converted to use waste oil?

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

My '99 300D with 200+K miles was doing the exact same thing on highway, and it was the fuel hoses, in, out of the filters, heater, IP etc. I replaced the entire lot of them for about $ 50+ in parts. I also replaced the delivery valve O-rings & washers.
Everything is better now. I think I was sucking air some where.
My hoses were brittle and hard, could be he biodiesel degrading yours.

Best of Luck,

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Gary
Experience is something you get, Just after you needed it....
'99 E300 295K, '83 300D 220K, '75 240D 185K sold
'80 MCI Bus Conv DD 6V92TA, w/4 cyl. Kubota diesel GenSet 12.5KW

The surging issue on the 606.910 is oftentimes a resonance or egr flap issue. They can get gummed up with oily crud in the intake runners and/or the electical transducers controlling the flaps (or wiring) can go bad.

search 95 E300 and surging; should be lots written on it.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

Maybe the conversion he mentioned was replacing the fuels lines? As Cessna mentioned, biodiesel will break down the factory fuel lines.

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On some nights I still believe that a car with the fuel gauge on empty can run about fifty more miles if you have the right music very loud on the radio. - HST

1983 300SD - 305000
1984 Toyota Landcruiser - 190000
1994 GMC Jimmy - 203000

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