2021 Mercedes-Benz GLS vs 2021 BMW X5

The 2021 Mercedes-Benz GLS, a continuation of the third generation introduced in 2020, was a luxurious SUV that offered a blend of practicality and elegance. Originally launched as the GL-Class in 2006, it was intended to replace the G-Class but instead found its niche among affluent families seeking a more comfortable alternative to the Navigator and Escalade. The GLS featured a sleek design with softened angles and a futuristic interior dominated by a massive digital screen, emphasizing its tech-savvy nature. Available in three trims—GLS 450, GLS 580, and the high-performance AMG GLS 63—the GLS catered to a range of preferences, from standard luxury features to aggressive styling and powerful performance in the AMG variant.

The 2021 BMW X5 was a testament to BMW's reputation for high-quality craftsmanship, maintaining the brand's signature design elements like the kidney grille and body shape. While this consistency ensured familiarity, it also risked blending in with other BMW models. The X5 boasted adaptive LED headlights and a choice of wheel sizes, enhancing its upscale appearance. Inside, the X5's interior was a mix of familiar BMW elements, with a focus on leather and soft-touch materials. The M Sport models added a sporty flair with unique styling cues. Despite some sameness in design, the X5 offered a comfortable and functional interior, though the abundance of black plastic was prone to collecting dust.

The 2021 Mercedes-Benz GLS offered a range of powerful engines, starting with the GLS 450's twin-turbocharged 3.0-liter inline-six, producing 362 horsepower and 369 pound-feet of torque. The GLS 580 stepped up with a twin-turbocharged 4.0-liter V8, delivering 483 hp and 516 lb-ft. Both models featured a nine-speed automatic transmission and Mercedes' 4MATIC all-wheel drive. 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, enhancing performance and efficiency. The GLS 63's adaptive air suspension and multiple drive modes provided a dynamic driving experience, while E-Active Body Control ensured a smooth ride.

The 2021 BMW X5 offered a variety of powertrains, all paired with an eight-speed automatic transmission. The base X5 sDrive40i/xDrive40i featured a 3.0-liter inline-six engine, producing 335 horsepower and 330 pound-feet of torque. The X5 M50i boasted a twin-turbocharged 4.4-liter V8 with 523 hp and 553 lb-ft, while the X5 M delivered 600 hp, increasing to 617 hp with the Competition Package. The X5 xDrive45e plug-in hybrid combined a 3.0-liter six-cylinder engine with a 24-kilowatt-hour battery, achieving 389 hp and 443 lb-ft of torque, with up to 30 miles of all-electric range. Despite its power, the X5's steering dynamics were less engaging than expected, particularly at higher speeds. The X5's ride was comfortable, with minimal road noise, and the plug-in hybrid offered convenient charging options.

The 2021 Mercedes-Benz GLS excelled in interior space, offering three rows of 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, accommodated full-size adults comfortably. 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 rear rows down. The interior featured numerous storage compartments, including spacious in-door bins and a combination cup-holder/wireless-charging pad.

The 2021 BMW X5 made efficient use of space, with front cupholders positioned conveniently at the center console. The interior was comfortable for short trips, though front seats could feel hard over longer journeys. Rear seats were suitable for children and adults, with an optional third row available. The X5's split liftgate and vehicle height adjustment button facilitated easy loading of cargo. Without the third row, the X5 offered ample cargo space, though the xDrive45e variant had slightly less. The SUV's doors did not open wide, making access to the second row less convenient.

The 2021 Mercedes-Benz GLS featured the MBUX infotainment system, with a large touch screen and a trackpad for navigation. It included Apple CarPlay and Android Auto, though a USB-C cable was required for connection. The MBUX system's voice control responded to commands like "Hey Mercedes," offering a user-friendly experience. The digital dash extended to the instrument panel, both controlled by touch-sensitive pads on the steering wheel, allowing for customizable displays.

The 2021 BMW X5 came equipped with a 12.3-inch infotainment touchscreen, wireless Apple CarPlay, and Android Auto. The system occasionally took over music operations unexpectedly, requiring a reset to resolve. Standard features included a digital gauge cluster, a 10-speaker sound system, and a panoramic moonroof. Optional upgrades included a head-up display, massaging seats, and premium audio systems. The iDrive system required some acclimation but was intuitive once familiar.

The 2021 Mercedes-Benz GLS offered a comprehensive suite of standard safety features, including Active Brake Assist, forward-collision avoidance, blind-spot monitoring, and automatic high beams. Additional safety options included lane-keep assist, adaptive cruise control, and stop-and-go cruise control. The GLS was equipped with a full array of airbags, traction control, and a tire-pressure monitoring system.

The 2021 BMW X5 came with a robust list of standard safety features, such as blind-spot monitoring, forward collision warning, and adaptive cruise control. However, the Driving Assistance Professional Package had issues with adaptive cruise control and lane-keeping, particularly in bright sunlight or rain. The X5 received mostly Good ratings from the IIHS and a four-star overall safety rating from the NHTSA, despite being subject to several recalls.