FILE - In this Feb. 28, 2011 file photo Matthias Mueller, chairman of the board of Porsche AG gestures as he presents the new Porsche Panamera hybrid car during a presentation of VW (Volkswagen) prior to the 81st International Motor show in Geneva, Switzerland. Volkswagen announced in a news conference after its supervisory board meeting in Wolfsburg, Germany, Friday, Sept. 25, 2015, that Mueller will follow Martin Winterkorn, who resigned this week as CEO of the company. (AP Photo/Anja Niedringhaus, File)