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White House pushes automakers toward 54.5-mpg target by 2025

The White House is pushing automakers to agree by Wednesday to a corporate average fuel economy target of 54.5 mpg by 2025--a figure 1.7 mpg less than the 56.2 mpg standard it floated earlier this month. The easing of the White House plan stems from a concession to makers of light trucks and SUVs, and particularly larger vehicles in that segment, such as Ford's F-150, sources said. The latest White House proposal, the most definitive of any it has put forth, calls for a 5 percent annual mileage increase for cars from 2017-2025, said industry and congressional officials who asked not to be named because their discussions with the White House are confidential.

Porsche Cayenne S hybrid: More techs and specs released

Porsche is serving up a few more details on the Cayenne S hybrid, which is expected to arrive in 2010. It should be green--and mean to the tune of 385 hp and 545 lb-ft of torque. And carbon-dioxide emissions are expected to be reduced by 20 percent over a comparable combustion engine.

First Sight: Mercedes-Benz SL

The new high-tech, low weight Mercedes SL roadster receives its official global unveil next week in Detroit but Car Design News got an early peek of the final production car and had a chat with its designers at Mercedes' US advanced design studio in Carlsbad, California back in November. "We want to get back to clean, long-lasting design," director of Mercedes global advanced design and SL project leader, Steffen Kohl told CDN at the exclusive preview of the sixth-generation model. "So the new SL is long, sleek and still full of tension in the feature lines but less wedgy." In a short presentation Kohl felt all SLs became successfully iconic in their times because they followed two key rules – ‘sensuality' and ‘cleanness' – but alluded that the first rule may have been lost in more recent eras.