The supercharged 5.4-liter V8 was replaced by a new one 5.5-liter biturbo V8 in 2012 (2013MY in the US) for better fuel economy and lower emissions. The AMG G 63 made a few more exterior changes to give the AMG a more "bold" look: a single horizontal fin with double chrome edges in the middle of the radiator grille, a more prominent triangular star ornament the middle, a new alloy wheel design, both sides of the front bumper and three enlarged air intakes the middle, angular chrome strips to cover the small bumper guards and the exterior rearview mirrors from the GL-Class and ML-Class.