Let's not forget that CO levels rise when a diesel is run under no load conditions because of low combustion chamer temps.

So, it could be stated as fact that a OM617 running at idle is going to generate a measurable amount of CO, enough to kill a family pet or human inside a closed vehicle.

Not only that, there is laundry list of carcinogens in diesel exhaust. Not something I would want to be breathing.

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"I was a dirty bird, Carol's not grungey - she's *****in" John Milner....American Graffiti