Volkswagen AG is set to appoint Porsche brand chief Matthias Mueller as its new CEO and announce the departure of top executives in a sweeping overhaul to begin repairing the company’s image tarnished by rigged emissions tests. The 20-person supervisory board meets Friday to vote on naming Mueller, a company veteran for four decades who enjoys the support of the family that controls VW as well as the automaker’s influential labor leaders, said people familiar with matter, who asked not to be identified because the discussions are private. A Volkswagen spokesman declined to comment.