Porsche will unveil its new Panamera sporty sedan at this year's Paris auto show, company sources told Automotive News Europ e, marking the brand's second major product rejuvenation after the recent revamp of the mid-engine 718 Boxster/Cayman model line. The second-generation Panamera will use parent Volkswagen Group's lighter-weight, more fuel-efficient MSB platform, which also is expected to underpin models from Bentley, Bugatti and Lamborghini. The new Panamera will go on sale in Europe shortly after its public debut in Paris on Sept. 29. China and the U.S., the brand's two biggest single markets respectively, will follow in 2017. Related Story The Panamera was the poorest-selling of Porsche's five model lines last year, but it has proved popular in particular in China where customers prize the four-door sedan's roominess not offered in the 911 sports car.