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Originally Posted by 85chedeng300D
ForcedInduction; The Don,
Thanks for your reply, and for all the infos. I know the Germans overengineered this car too much and I know that this is not much of a necessity to have this Air Recirculating Valve, Federal versions doesn't have it, but, I just wanted to restore this car back to on how it was, just like how the Germans designed and built it. They put that part in this car for a reason. They didn't just put "$#1t" in it. If not for performance, for longevity, maybe, who knows. It has been disabled for a while now since it last broke and the car , I guess, I'm the one driving it every single day, has not been the same like it used to be. So, I just don't want to repair it but I want to fix it right. I dont want to "half-a$$" it. Whats the sense of driving a gorgeous car like this if it has a "band-aid" on it? You know what I mean? I hope you all understand. This is what this forum is, right? "To take good care of our Benzes" Thanks again!
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We understand, but I think what ForcedInduction was saying is that "the engineers" did not place the ARV there because it was necessary for the safe, efficient, reliable and durable operation of the OM617. Instead, it was placed there solely to meet state emissions standards. It does so by working as part of a system that takes your engines waste gases, and forcing them to be burned a second time through your engine. This provides a benefit as far as your emissions, at the cost of sooty build up in your intake.
No one will fault you for restoring your vehicle to stock, but many feel that the way "the engineers" truly intended the car to be, is without the egr/arv.