Found an interesting note from the US embassy in Germany, which I would like to share with you.
"German manufacturers appear to be leaving the rest of the world behind in the research and developement of high-tech diesels, which have become super efficient in fuel consumtion."
http://www.usembassy.de/iaa/isa.htm
"German manufacturers appear to be leaving the rest of the world behind in the research and developement of high-tech diesels, which have become super efficient in fuel consumtion."
http://www.usembassy.de/iaa/isa.htm