BMW’s newest M5 couples 600 horsepower with all-wheel drive to deliver a true Ultimate Driving Machine experience, blogs Road Test Editor Howard Walker I'm channeling my inner Tom Cruise. No, not the TC in tighty-whities and cotton socks, bopping to Bob Seger's Old Time Rock n Roll in Risky Business. This is action-man Cruise in full Ethan Hunt mode, at the helm of a 600-horsepower ‘18 BMW M5, slippin', slidin' and char-grilling rubber on the streets of Paris in the latest Mission Impossible ro...