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Originally Posted by Onno
Thanks for all the information, though I'm still pretty confused. It sounds as though late next year, if at all. I don't get it, really. It's hard to imagine VW is holding things back, since I think there is a LOT of pent up demand for these vehicles.
Why would federal and state (California?) regulators be holding these cars back? Doesn't their super high mileage mean that they have less impact on greenhouse gas emissions? And hasn't the particulate problem been addressed by the higher quality fuel now in the US, and new exhaust management? Why are they fine for Europe, and not for the US?
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Part of the higher mileage of diesel is due to its higher energy density. That offsets some of the efficiency gains while putting out more particulates and other pollutants like NOx. Even using biodiesel just shifts the pollutants around.
http://www.ucsusa.org/clean_vehicles...l-dilemma.html