By Rachel More MUNICH (Reuters) -Introducing a minimum requirement for European content in cars sold in the EU is vital for keeping the region's auto sector competitive, Christophe Perillat, chief executive of French car parts supplier Valeo, said on Wednesday. The European Commission is in talks with carmakers and their suppliers on ways to secure the sector's future as it navigates an expensive shift to electric vehicles, stiff competition from China and tariff uncertainty. For car executives, the foc ...