I'd guess 23-27mpg based on what my stick shift 240D gets I get 24 (flogging) to 28 (highway commute). Somewhere there are big threads on fuel economy (problem is that they are too big to sift through easily...)

-John

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2009 Kia Sedona
2009 Honda Odyssey EX-L
12006 Jetta Pumpe Duse
(insert Mercedes here)

Husband, Father, sometimes friend =)