Way back in 2009 when I spent a week with a European-spec
+BMW 123d I praised the powertrain's performance and efficiency but lamented the fact that it wasn't available in the US market and more specifically in the 3 Series.
http://green.autoblog.com/2008/08/05/in-the-autobloggreen-garage-2008-bmw-123d-3-door-hatchback/
BMW's 1 Series is a great driving machine based on the the higher volume and much praised 3 series. Unfortunately despite the shorter wheelbase and significantly compromised interior packaging it was only about 100 pounds lighter than the 3.
I closed out my review then with the wish that BMW would offer it's marvelous turbodiesel four-cylinder in the US market 3 series wagon, combining the great dynamics of the 3 sedan with some reasonable utility and great fuel efficiency. It looks like that car will finally be arriving about a year from now.