Story: RALPH MORTON   Mercedes-Benz Commercial Vehicles has a new managing director - it's Michael Kamper. Michael has worked previously at Mercedes-Benz in the commercial vehicles marketing department from 2001-2004, and he's described by MB insiders as 'warm, friendly and a people's person'. The appointment commences in July when Michael, 46, joins the business from Daimler Trucks' International Key Account [...]