does the resignator get plugged up over time

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what a day

Not really, they are a straight through design. if it is plugged it'll be louder but should not really effect performance.

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82 MB 300TD, 87 Audi 4000TQ, 05 Audi A4 avant 1.8T 6spd (Wifes), 63 356C, Samurai VW 1.6TD, 71 NSU 1200C, 71 Toyota Hilux, tractors and junk

thanx markp

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what a day

What car? MB diesel exhaust components COULD include catalytic converter, center muffler, rear muffler. A resonator would likely be an aftermarket item. Catalytic converters do get clogged.

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2009 E320 Bluetec 117,000
1995 E300D 306,000 Sold
1996 Ford Taurus LX 130,000 Sold
1985 300TD Still 225,000 Sold
2016 Ford Fusion 24,900

im pretty sure diesels do not have car converters

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what a day

I invite you to see the oxidation catalyst devices MB of Sugar Land and Smothers MB installed under my '87 300Ds as part of the trap oxidizer recall.

Sixto
87 300D^2

huh? all diesels sold in the usa in the past 30 years or so have a catalytic converter. required by law.

yea diesels dont have cat converters they have oxidation catylyst...diesels dont burn the same as gas engines... gas engines you gotta worry about carbon monoxide/dioxide and acid bases. Diesels you have to worry about particulate matter and any form of a nitrogen based product

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what a day

Early catalytic converters on gasoline vehicles were oxidation only to reduce emissions of CO and unburned fuel. Later, the three-way catalyst was widely adopted, which addressed nitrogen oxide emissions. Benzkid- when catalytic converters were developed, I am pretty sure nobody was worried about carbon dioxide. And what is this "acid base" you speak of?

Vehicles of either fuel type may have "catalytic converters".

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1968 220D, w115, /8, OM615, Automatic transmission.
My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear).

HuH??? What law?

Not so. My 2003 Dodge has no emission controls at all. No EGR, no PCV, and no exhaust after treatment.

Negative Ghost Rider....

I had a 2001.5 Dodge 3500 Dually with the Cummins Diesel (bought it new and sold it years ago). It came from the factory without a Catalytic Converter.

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AJ

1985 300D (SOLD)

ok so now comparing trucks to cars is apples to oranges... truck dont have the same restrictions as cars... so i would go so far as to say most if not all cars (NAS or US spec) have a cat after 96 when OBD2 became a requirement in the USA...
I just did a complete exhaust replacement on my 85 300d (w123) and it has improved performance. I have more low end torque and top end power is up as well. The old original exhaust had rusted out pretty good to the point that it all had to be replaced...
now that was under $400 for all new parts shipped to my door, so to me it was worth it. now i can go another 25+ years not having to worry about it falling off...lol

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85 mercedes 300D-T 258k miles

The diesel engine can not use a catalytic converter.

The trap oxidizer first appeared in 1985 California models.

Many years later, it was finally added to 49 state production vehicles.

Most states still don't have inspection, or care if the trap oxidizer is on the vehicle.

IMO the trap oxidizer is expensive, useless, horse power stealing trash, added to drag diesel MPG down closer to gasoline engines, and make the environmental crowd feel vindicated.

As to the LAW, most owners realize it was toothless (except in five states).


.

I humbly disagree with our resident expert. Not that I would blindly trust Wikipedia, but it is actually correct when it states:

Catalytic Converters for Diesel engines
For compression-ignition (i.e., diesel engines), the most commonly used catalytic converter is the Diesel Oxidation Catalyst (DOC). This catalyst uses O2 (oxygen) in the exhaust gas stream to convert CO (carbon monoxide) to CO2 (carbon dioxide) and HC (hydrocarbons) to H2O (water) and CO2. These converters often operate at 90 percent efficiency, virtually eliminating diesel odor and helping to reduce visible particulates (soot). These catalysts are not active for NOx reduction because any reductant present would react first with the high concentration of O2 in diesel exhaust gas.

or check out:
Magnaflow Diesel Direct Fit Catalytic Converter

or check out:
Forklift exhaust fumes - Catalytics Converters for Diesel Engines

or check out:
http://www.nett.ca/tools/techsup/nett_doc_factsheet.pdf

As an aside, children's lungs are particularly sensitive to diesel particle emissions. Retrofitting diesel buses has been shown to reduce exposure of children to carcinogens and acids. I don't have any specific knowledge of Mercedes particle traps, but particle traps are far from useless in general.

Can we leave conspiracy theories aside for a moment and agree that diesel particle traps were not added to "drag diesel MPG closer to gasoline engines?" You don't have to agree with environmental policy, but let's try to keep our discussions factual.

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1968 220D, w115, /8, OM615, Automatic transmission.
My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear).