Swiss born Diego Benaglio played goalkeeper under what German coach?
2007–08 VfL Wolfsburg season: VfL Wolfsburg had their best ever season under new coach Felix Magath. 2007–08 VfL Wolfsburg season:  New signings Diego Benaglio, Josué, Grafite and Edin Džeko were all successful and played a big part in the resurgence.
i don't know