 The performance of this vehicle in light of the fuel economy is almost impossible to believe.  I hope BMW continues to bring clean diesel technology to the U.S. in such wonderful combinations of efficiency and driving excitement.  A diesel in the 1 series and the updated X3 which is coming next year would be great additions.   The interior is understated, elegant and well-constructed.  My only regret is not having the sports package with the sports seats.  With the eco-credit and tax incentives, this car is a terrific value.  I will save $6000 in fuel and maintenance over any other competitive performance vehicle during the next four years.