Mercedes CLS AMG vs Porshe Panamera GTS - Fifth Gear

The guys are putting the Mercedes CLS AMG and the Porshe Panamera GTS to the test on the Castle Combe circuit but in a moment of madness, Vicki gives the keys to Johnny. For more fantastic car reviews, shoot-outs and all your favourite Fifth Gear moments, subscribe to our Official Channel - https://www.youtube.com/user/fifthgearuk