Popular Science chose the Dodge Magnum as the Grand Award winner in the Cars Category for their annual "Best of What´s New" competition on Wednesday. Mercedes-Benz also garnered two "Best of What´s New" awards. One award went to the company´s diesel-powered E320 CDI, a four-door luxury sedan that can get 37 miles per gallon on the highway. The other went to the new SLK convertible.In addition, the Stow ´n Go seating and storage system in the Chrysler Town & Country and Dodge Grand Caravan minivans was named "Best of What´s New" in the Auto Tech Category. The editors recognized the new technology that allows both the second- and third-row seats to be easily folded flat into the floor. To win a Popular Science "Best of What´s New" award, a product or technology must represent a significant leap in its category.