2021 Mercedes-Benz GLS vs 2022 Subaru Ascent

The 2021 Mercedes-Benz GLS, a continuation of the third generation introduced in 2020, was a luxurious SUV that offered a more refined and svelte appearance compared to its predecessors. Originally known as the GL-Class, the GLS was designed to replace the G-Class but ended up appealing to a different clientele due to the G-Class's enduring popularity. The GLS featured softened angles and lines, creating a more streamlined look. Inside, it boasted a futuristic cabin with a massive digital screen that spanned nearly two-thirds of the dash, emphasizing its tech-reliant controls. Available in three levels—GLS 450, GLS 580, and the performance-oriented AMG GLS 63—the GLS offered a range of standard features, including remote keyless entry, nine USB ports, and a 13-speaker Burmester premium sound system. Various option packages allowed for further customization, enhancing comfort and luxury.

In contrast, the 2022 Subaru Ascent introduced the Onyx Edition trim, which added a sporty, blacked-out exterior to the lineup. Positioned in the middle of the Ascent's trim levels, the Onyx Edition featured black 20-inch aluminum wheels, unique grille design, and water-repellant StarTex synthetic leather seats. While the blacked-out treatment gave the Ascent a sporty appearance, the interior's gray two-tone scheme with metallic trim provided a modern touch. However, the StarTex material had a tendency to trap sweat, making ventilated seats a desirable feature, though only available on the Premier trim. The Ascent's interior was designed for practicality, with wide rear doors and ample storage, but the third-row seating was best suited for children rather than adults.

The 2021 Mercedes-Benz GLS offered a range of powerful engine options. The entry-level GLS 450 was equipped with a twin-turbocharged 3.0-litre inline-six engine, producing 362 horsepower and 369 pound-feet of torque. The GLS 580 4MATIC featured a twin-turbocharged 4.0-litre V8, delivering 483 hp and 516 lb-ft. Both models utilized a nine-speed automatic transmission and Mercedes' 4MATIC all-wheel drive system. The AMG GLS 63, with its hand-crafted 4.0-litre twin-turbo V8 engine, generated an impressive 603 hp and 627 lb-ft of torque. This powerhouse could accelerate from zero to 100 km/h in just 4.2 seconds, reaching a top speed of 280 km/h. The GLS's adaptive air suspension system allowed for adjustable ground clearance, enhancing both cornering and obstacle clearance. Multiple drive-mode settings, including Comfort, Sport, and Sport+, provided a customizable driving experience.

The 2022 Subaru Ascent, on the other hand, was powered by a turbocharged 2.4-litre four-cylinder engine, producing 260 horsepower and 277 pound-feet of torque. It came standard with a continuously variable transmission (CVT) and all-wheel drive. The Ascent's fuel consumption was rated at 10.5 litres per 100 kilometres combined, with our testing averaging 11.5 L/100 km. The flat-four engine design contributed to a lower centre of gravity, improving handling. The CVT offered eight programmed ratios and manual shift control, allowing for brisk acceleration and commendable passing power. The Ascent's X-Mode off-road traction control system, hill descent control, and 22 centimetres of ground clearance provided off-roading capability. While the Ascent demonstrated agility in urban and suburban settings, its lane-keeping and lane-centring assistance technologies could feel uncertain on highways.

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 not as spacious, was still suitable for full-size adults. The GLS provided 355 litres of cargo space behind the third row, expanding to 1,209 litres with the third row folded, and a total of 2,400 litres with both rows down. The driver and front passenger enjoyed numerous storage compartments, including a combination cup holder/wireless charging pad and a centre console with butterfly doors.

The 2022 Subaru Ascent could accommodate up to eight passengers with a second-row bench seat, though the third row was best suited for children. The Ascent's interior featured a comfortable driving position, triple-zone climate control, and heated front seats. Loading the second-row seat was made easy by wide rear doors, and captain's chairs were available on most trims. The Ascent provided 458 litres of cargo space behind the third row, 1,193 litres behind the second row, and a maximum of 2,061 litres with both rows folded. A useful dashboard shelf and large cupholders in the second row added to the practicality.

The 2021 Mercedes-Benz GLS came equipped with the MBUX infotainment system, featuring a massive touch screen and a trackpad for navigation. It included Apple CarPlay and Android Auto connectivity, though a USB-C cable was required. The MBUX system's voice-control feature allowed for complex commands, and the digital dash extended to the fully digital instrument panel, controlled by touch-sensitive pads on the steering wheel. The system offered a learning curve but provided a comprehensive technological experience.

The 2022 Subaru Ascent's base trim featured a 6.5-inch touchscreen infotainment system with Bluetooth, Apple CarPlay, and Android Auto connectivity. The Touring trim added an 8-inch display with Starlink connected services. While the system was not Subaru's latest, it was user-friendly, with separate climate controls. The voice recognition technology required improvement, as it demanded specific commands. Onyx Edition models used standard stereo speakers, and the Harman Kardon premium sound system was not available on this trim.

The 2021 Mercedes-Benz GLS came standard with a range of driver-assistance features, including Active Brake Assist, rain-sensing wipers, and automatic high beams. Additional safety tech included lane-change assist, adaptive cruise control, and blind spot monitoring. The GLS was equipped with a full array of airbags, traction control, and a tire-pressure monitoring system.

The 2022 Subaru Ascent received a "Top Safety Pick+" award from the IIHS and five-star crash-test ratings from the NHTSA, except for a four-star rating in rollover resistance. The Ascent featured Subaru's EyeSight driver-assist technology, including adaptive cruise control and lane-centring technology. However, EyeSight's performance was affected by direct sunlight, and the adaptive cruise control lacked refinement. Additional safety features included steering responsive LED headlights and reverse automatic braking.