300D 2.5 Questions

Why was the engine from the 190D 2.5 put into the 300D in lieu of the 3-litre engine (617?) to make the 300D 2.5, and why wasn't this model sold in California?
Was the W124 300D concurrently produced with the 3-liter? Or did it return to the 3-liter engine after the 2.5 was used for a time?
What's the rationale for having the engine breathe through those slots on the right fender? Why was this not used for other MBZ diesel models since then?
Geoff
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Cooler air flows faster than warm air generated in the engine bay thus increasing throttle response and top end performance!If you ever seen under the hood of boy racer cars,you will most likely see the cone type air filter out in the open!Though it looks "cool",they are causing air/fuel ratio errors due to the "hot air" being inducted through their (airflow meter,airmass meter etc.....)and telling the ECU the wrong information,resulting in lean running at higher RPMs'. The cure for this is a cold air box,which isolates the air filter from the engine heat.Okay,I'm rambling on,sorry,euro gearhead!
Geoff Miller wrote:

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