The 2026 Mercedes-Benz GLS is a luxury SUV built with a focus on comfort and performance. This model belongs to the third-generation GLS series that was fully redesigned in 2019. Two expansive trims, the GLS 450 and GLS 580, are equipped with a 362-hp turbocharged inline-six and a 483-hp twin-turbo V8, respectively, both paired with a 9-speed automatic transmission and Mercedes's signature 4MATIC all-wheel drive. Its plush, roomy interior is trimmed with high-quality materials and features MBUX infotainment with a 12.3" touchscreen, Apple CarPlay, and Android Auto. Comprehensive driver assists include adaptive cruise control, lane-keeping assist, and automatic emergency braking. The GLS also features Mercedes's E-Active Body Control suspension that can individually control the spring and damping forces at each wheel, mitigating body roll, pitch, and squat. This year's model also sees more optional standalone features, enhancing its customization potential.