David Groenewold, co-defendant of former German president Christian Wulff, arrives for the trial at the regional court in Hanover December 12, 2013. Wulff, who served just 20 months as president and was the man once tipped as a successor to Chancellor Angela Merkel, stood down in April 2012, when prosecutors asked parliament to lift his immunity, saying they suspected he had accepted undue privileges. Wulff rejects the charges and in April this year spurned an offer to settle the case with an out-of-court payment. REUTERS/Fabrizio Bensch(GERMANY - Tags: POLITICS CRIME LAW)