2021 Mercedes-Benz GLS vs 2021 Audi Q5

The 2021 Mercedes-Benz GLS, a continuation of the third generation introduced in 2020, evolved from the GL-Class, which debuted in 2006. Initially intended to replace the G-Class, the GLS instead found its niche among affluent families seeking a luxurious, three-row SUV. The GLS's design softened its previously boxy appearance, incorporating sleek lines and visual tricks to appear more compact. Inside, the GLS boasted a futuristic cabin dominated by a massive digital screen, emphasizing its tech-centric controls. Available in GLS 450, GLS 580, and the high-performance AMG GLS 63, the GLS offered a range of standard features, including remote keyless entry, nine USB ports, and a 13-speaker Burmester sound system. Optional packages added further luxury, such as ventilated seats and heated armrests.

The 2021 Audi Q5 presented a sharp, modern design that adhered to Audi's design language while maintaining its unique character. Its expressive front end featured LED headlights and a prominent Singleframe grille, while the body showcased crisp lines and a protective greenhouse. The rear was marked by bold taillights, completing its classy appearance. Inside, the Q5 continued the modern theme with a tech-packed yet uncluttered cabin. High-quality materials, including real wood and metal, were used throughout, and the 10.1-inch touchscreen was strategically placed for easy driver access. The second row offered ample space and comfort, with standard leather seating surfaces.

The 2021 Mercedes-Benz GLS offered a range of powerful engines. The entry-level GLS 450 featured a twin-turbocharged 3.0-liter inline-six engine, producing 362 horsepower and 369 pound-feet of torque. The GLS 580 upgraded to a twin-turbocharged 4.0-liter V8, delivering 483 hp and 516 lb-ft. Both models used a nine-speed automatic transmission and Mercedes' 4MATIC all-wheel drive system. The AMG GLS 63, with its hand-crafted 4.0-liter twin-turbo V8, generated an impressive 603 hp and 627 lb-ft of torque, achieving 0-60 mph in just 4.1 seconds. All engines included Mercedes’ EQ Boost 48-volt mild-hybrid system, adding an extra 21 hp and 184 lb-ft of torque when needed. The GLS 63 featured adaptive air suspension, multiple drive modes, and E-Active Body Control for a smooth, composed ride.

The 2021 Audi Q5 PHEV enhanced the standard Q5's performance with a 14.1-kWh battery, adding 114 horsepower and 96 pound-feet of torque. The combined output of 362 hp and 373 lb-ft of torque matched well with the Q5's 4,665-lb curb weight. The PHEV's 2.0-liter turbocharged inline-four engine and electric motor provided a 0-60 mph time of 5.0 seconds and a fuel economy of 65 MPGe combined. The Q5 PHEV used a seven-speed S Tronic automatic transmission with Quattro all-wheel drive and offered various driving modes, including electric-only and hybrid. The Q5's handling was enhanced by its four-wheel independent suspension and speed-sensitive electromechanical power steering, providing a sporty yet comfortable ride.

The 2021 Mercedes-Benz GLS offered three rows of spacious seating, with ample headroom and legroom for first- and second-row occupants. Standard seven-passenger seating could be reduced to six with optional second-row captain’s chairs. The third row, while less spacious, was still suitable for adults. The GLS provided 17.4 cubic feet of cargo space behind the third row, expanding to 42.7 cubic feet with the third row folded, and 87.4 cubic feet with both the second and third rows folded. The driver and front passenger enjoyed numerous storage compartments, though the center console was relatively small.

The 2021 Audi Q5 PHEV managed to accommodate its battery pack without sacrificing cargo space, offering 25.1 cubic feet behind the second row and 53.1 cubic feet with the second row folded. The second row provided 37.8 inches of legroom, 37.7 inches of headroom, and 56.5 inches of shoulder room, comfortably seating two adults. The front seats were highly adjustable, heated, and ventilated on the Prestige trim. The Q5's interior featured several storage compartments, including a center-console bin, and maintained a clean, functional design.

The 2021 Mercedes-Benz GLS featured the MBUX infotainment system with a large touch screen and a trackpad controller. The system included Apple CarPlay and Android Auto, though a USB-C cable was required. The MBUX voice-control system responded to commands like “Find me a gas station,” and the digital dash extended to the fully-digital instrument panel, both controlled by touch-sensitive pads on the steering wheel. The system had a learning curve but offered extensive customization once mastered.

The 2021 Audi Q5 PHEV came with Audi’s MMI 10.1-inch touchscreen infotainment system and the Audi Virtual Cockpit Plus 12.3-inch HD instrument cluster, offering three customizable views. The Prestige Package included navigation, which worked with the hybrid system to optimize fuel consumption. The Integrated Toll Module (ITM) was standard, and a Bang & Olufsen 3D audio system was available on Premium Plus models and standard on the Prestige trim. Wireless Apple CarPlay was also included.

The 2021 Mercedes-Benz GLS came standard with numerous driver-assistance features, including Active Brake Assist, forward-collision avoidance, rain-sensing wipers, blind-spot monitoring, and automatic high beams. Additional safety features included automatic parking assist, a surround-view camera system, a driver-drowsiness monitor, and crosswind assist. Optional safety tech included lane-keep assist, lane-change assist, adaptive cruise control, and stop-and-go cruise control. The GLS also featured a full array of airbags, traction control, self-tensioning seatbelts, and a tire-pressure monitoring system.

The 2021 Audi Q5 PHEV had not been rated by the IIHS or NHTSA, but the 2020 Q5 received top ratings in most categories. Standard safety features included six airbags, an anti-lock braking system with brake assist, Audi Pre Sense basic, low-speed collision assist, power child safety locks, electronic stability control, and a rearview camera. Available driver-assistance features included Audi Advanced Key, Audi Pre Sense rear, Audi Side Assist with rear cross-traffic alert, adaptive cruise control, park steering assist, traffic-sign recognition, and a top-view camera system.