Say goodbye to the high revving V10 and hello to the bellow of a twin turbo charged V8. The new M5 was recently caught undergoing final suspension testing at the Nurburgring by our friends at Bimmerpost. With tires squealing and turbos whaling it ‘s clear this new four door super saloon will be an absolute screamer.But the question remains, will it be as exhilarating as the E60 or E39 M5s that came before it?