We took a spin in the 2019 Mercedes-AMG GT 4-Door Coupe; Hennessey revealed a goal of 311 mph for the Venom F5; and Mercedes-AMG named its hypecar. It’s the week in reverse, right here at ‘Motor Authority.’ We slid behind the wheel of the 2019 Mercedes-AMG 4-Door Coupe and found it sets a new bar for super sedans. When it goes on sale in the U.S…