twin-turbo V-8 (580). The ultra-luxury Maybach GLS600 and high-performance AMG GLS63 get a twin-turbo V-8 with 550 and 603 hp, respectively. All GLS models come standard with all-wheel drive.

All GLS models come standard with all-wheel drive. There’s enough room for adults in all three rows, which isn’t always the case even in extra-large SUVs. A digital instrument panel sits flush ...