The Porsche Panamera is a luxury four-door sedan. It is front-engined with two-wheel drive, with all-wheel drive versions also available. The Porsche Panamera production model was unveiled at the 13th Auto Shanghai International Automobile Show in Shanghai, China, on April 2009. In 2011, hybrid and diesel versions were launched. In April 2013, a facelift to the Panamera was announced, launching again at the Auto Shanghai show. A plug-in hybrid version, the Panamera S E-Hybrid, was released in the U.S. market in November 2013.