hey all, i broke a vacuum line connection on what i believe is my exhaust pressure transducer on my '78 280CE Cali version. this is the line that connects the EGR valve via a larger orange vac line and pumps into the transducer. my questions are:

is this in fact the exhaust pressure transducer? if not, what is it?

will this hurt the car to drive it in any way? i was replacing vacuum connections in the engine bay when this happened. the car starts, drives, and idles fine (maybe even better but that's probably because of the new vac pieces).

is this emissions issues only? i don't have to pass any emissions tests here in NY and this stuff typically harms the engine, correct? i removed the egr on my 300D, is this a similar situation?

where can i find one of these to replace it? is there another name for it because i can't find an 'exhaust pressure transducer' on any parts website.

also just wanted to say how helpful nutz4benz' website is. thanks for all the useful info, i've referred to it over and over again! if you aren't aware of it, which i'm sure everyone is, just google 'w123 gassers only'.

thanks for the help!

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1985 300D - 1984 Euro 280E AMG Clone (SOLD) - 1978 280CE (SOLD) - 1983 300D (SOLD) - 1981 300D (SOLD)

Yes, it is the transducer. I just checked my used parts; I used to have one lying around, but I have must have tossed it out already.

As long as you don't have a line direct to the intake manifold that is broken, You should have no problem driving it as is. You can always remove the entire system anyway.

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can you go into detail about that? i'd like to remove it all but i'm not sure which vac lines to plug up and which ones to connect together, etc. i have a cali smog pump/air pump that i don't need as well. can i just take the belt off and be done with the whole thing? i'd like clean up my engine bay though...

thanks for the info & quick response!

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1985 300D - 1984 Euro 280E AMG Clone (SOLD) - 1978 280CE (SOLD) - 1983 300D (SOLD) - 1981 300D (SOLD)

Yes, you can just remove the air-pump belt, but the EGR will still operate if you don't disable it. To do so, you can either plug a vacuum line to it, or disconnect it. I agree with your idea of removing it all and cleaning up the bay. You can even get a Euro front exhaust manifold to avoid covering the hole after removing the EGR.

You can remove everything in the diagram with the exception of #9 and #39. When you're finished, #9 should have one vac line direct to the intake manifold and one vac line direct to the retard side of the distributor. The advance side of the distributor should also have now a direct line to the intake manifold as well.

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All the EGR plumbing can can be removed as well. In the end, you'll need to get a plug for the EGR-pipe-to-intake manifold. I have written a couple a posts about this, which go into much more detail, but I don't have time at this moment to do the search. It's all do-able!

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Don't Chrome them; polish them