Mercedes-Benz A45 AMG for GTA 5. The Mercedes-Benz A 45 AMG is a compact sports hatchback that is an aggressive combination of power, style and innovation. On the outside, the A 45 AMG is a sporty and emotional design that combines athleticism and elegance. The car has typical AMG features such as an aggressive front grille, wide wheel arches, a diffuser and a roof spoiler.