Dieter Zetsche (R), chief executive officer of German car manufacturer Daimler AG, and Carlos Ghosn (L), chief executive officer of Renault-Nissan Alliance, hold a news conference before signing an agreement in Brussels April 7, 2010. Carmakers Renault SA , Nissan Motor Co and Daimler AG announced on Wednesday a strategic cooperation that includes a one-time exchange of minor stakes in each other. REUTERS/Thierry Roge (BELGIUM - Tags: TRANSPORT BUSINESS)