Did Mercedes-AMG win the battle of the clicks for news coverage from the 2017 Frankfurt IAA? The Project ONE hypercar was certainly one of the highlights - when did we last see an F1 engine in a road car? In the world of important new production cars, the VW T-Roc and Polo were the stand outs, while for futuristic prototypes, Audi was surely the winner with its Aicon concept.