Billionaire Nicolas Berggruen (R) and German Labour Minister Ursula von der Leyen arrive on an elevator to address a news conference at a Karstadt store located on the Kurfuerstendamm boulevard in Berlin September 3, 2010. Germany's Labour Ministry said on Friday all the necessary documentation for a takeover of retail firm Karstadt by Nicolas Berggruen had been signed. REUTERS/Fabrizio Bensch (GERMANY - Tags: EMPLOYMENT BUSINESS)