But Reithofer admits BMW made a mistake by not pushing diesels years earlier, when hybrids started grabbing attention.

FORBES: The Other Green Engine: Diesel?

"We need an action together to sell diesels in the U.S., " says Reithofer.

FORBES: The Other Green Engine: Diesel?

At BMW Chief Executive Norbert Reithofer last year assigned a group of employees to a skunk works effort to develop a new vehicle for megacities--potentially even under a new brand.

FORBES: Magazine Article