Henry Catchpole takes the Mercedes-AMG GT R Pro out on track to see if it's worth the extra cost. Does it handle that much better out on track? Subscribe for more Carfection videos: http://bit.ly/1V1yFYX Join the Carfection community... Like on Facebook: http://on.fb.me/1RvTdL4 Follow on Twitter: http://bit.ly/1JUAgiI