Super saloons blitz this month

June may have been the wettest month in 50 years but things are about to seriously heat up in July. This month will witness the launch of three hardcore performance saloons - the Audi RS5, the new Audi S6 and the Mercedes E63 AMG. So, what's the common factor among these three saloons? All three of these seemingly posh luxury cars pack punch enough to scare some everyday supercars.