Porsche revs up Volkswagen

Is it possible that Wendelin Wiedeking radiates energy, optimism, and good cheer even when he sleeps? Awake, he is so buoyantly jovial he practically floats. On this particular day the Porsche CEO is joking about his office on the second floor of the company's headquarters in Zuffenhausen, a suburb of Stuttgart. "Welcome to my spacious office," he says, surveying the modest metal desk and small conference table that crowd the narrow room.