Ferdinand Piech, chief executive of German car manufacturer Volkswagen, is seen on a video screen as he addresses a news conference at the International Frankfurt car show (IAA), September 9. Piech, who is accompanied by board members Peter Hartz, Robert Buechelhofer, Bruno Adelt and Jens Neumann (L t o R), said " I'm very satisfied with our four brands and I don't see any need for an addition " after rumours suggested that VW is interested in buying another car manufacturer.