Lots of CO is getting scrubbed by the cat converter. I'll argue that a 240 with a functioning emissions system is doing at least OK with carbon monoxide. They left the factory with a buttload of catalyst in the converters... of course old or replacement aftermarket cats won't do nearly as well... many folks are running older O2 sensors, too, which doesn't help either.

Still, going by the numbers, federal CO emission limits on cat converter fitted gas cars haven't changed that dramatically in the last 20 years. So, there's simply no way a newer 240 spits out as much CO as 2500 modern cars. Worst case is more like 2 to 4 modern cars.

As for recycling, it's true that the big stuff gets sorted pretty well, but recycling the electronic parts is a dirty, dirty business. Everybody sends that stuff places where the environmental laws are non-existent. Even in the US it's cheaper to send stuff off to be recycled than it is to even consider how to do it properly.

-Ryan