Test Drive: 2013 BMW M5

"Unless you've been living under a rock," Graeme Fletcher says, "you know exactly what the BMW M5 is all about." If you don't know what the BMW M5 is all about—and even if you do—then you're in luck, because Graeme Fletcher breaks it all down on this edition of Test Drive. (This segment originally appeared on Episode 7 of Motoring 2013.) **Watch full episodes of Motoring TV at MotoringTV.com**