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Future Audis may time traffic lights for you

Here's a trick efficiency-chasing hypermilers have been using for years: spotting the cycles of stoplights from 100 to 200 yards out and letting the car coast up to the light just before it turns green, then carrying on without ever letting the car come to a complete stop. These hypermilers, along with professional truck drivers, do this because they know that accelerating from a standstill burns the greatest amount of fuel, and because letting a car coast up to the light with the automatic transmission downshifting by itself is easier on the transmission than stomping on the brakes right beneath the stoplight. Oh, and it's easier on the brake pads as well.

Mercedes SLS Electric Drive takes to the track

Mercedes-Benz turned heads at the Paris motor show with the SLS AMG Coupe Electric Drive. The cool blue supercar costs $540,000, making it Mercedes-Benz’s most expensive car in the dealership. Mercedes also took the car to the Ascari race track in Spain.

Autoweek in review: Cadillac tests the ELR, we explore “automotive truisms,” and give thoughts on a 2012 Mercedes-Benz

The upcoming Cadillac ELR was spotted on the road, testing in camouflage. Autoweek explores “Automotive Truisms” with an Aston Martin Vantage V12. Enjoy the sights and sounds of the Aston on-track.