Hardtalk is in Stuttgart, Germany - a city with a long history of engineering and manufacturing. The auto industry is a major player here, which is good news for Stuttgart as long as the German car industry continues to thrive. Stephen Sackur speaks to Dieter Zetsche, the boss of Daimler, a company with a global reputation and the makers of Mercedes-Benz cars. However, over the past decade they have made some costly mistakes and they still face major challenges, not least the push for greener more efficient vehicles. Daimler has a proud reputation, but does it have a bright future?