Automotive News reports Porsche is hard at work on a plug-in hybrid version of its Panamera. According to unnamed sources, the vehicle is likely to begin production in 2014 and will be destined for the U.S. market. The move is part of a larger plug-in offensive from Volkswagen. VW owns 49.9 percent of Porsche and plans to debut electrified versions of its Audi Q7 and A3 as well as the European Passat. Those vehicles will reportedly trickle to market between 2014 and 2015. An all-electric Golf is also due in 2013. Funk Flex