2025 BMW X3 vs 2026 Mercedes-Benz GLS

The 2025 BMW X3 presented a seductive appearance for a two-box SUV, with its redesigned features capturing attention. Its oversized grille and aerodynamically honed flanks were complemented by a long and tall hood, a captivating dashboard-to-axle ratio, and a tapering greenhouse and roofline, all contributing to its athletic look. The test vehicle's expressive 21-inch wheels emphasized its taut, crouched appearance. The Arctic Race Blue paint, with its chilly silver undertones, paired perfectly with the machined surface wheel finish and gloss black M Sport details, while the Calm Beige upholstery added a touch of elegance. Despite the quality materials in expected areas, the interior revealed the X3's price point with some plastic elements, particularly in lower cabin areas, detracting from the overall luxury feel.

In contrast, the 2026 Mercedes-Benz GLS offered a range of models, including the GLS 450, GLS 580, AMG GLS 63, and Maybach GLS 600, with prices spanning from $91,600 to $181,350. Our GLS 450 test vehicle, equipped with the new Manufaktur Edition Package, featured 21-inch AMG wheels, the AMG Line Exterior Package, and the Night Package, enhancing its sporty appearance. The interior, similar to the smaller GLE-Class, boasted high-quality materials and detailing, though body creaks were noted on chilly mornings. The GLS provided a tailored feel, accommodating up to seven adults comfortably, with options for massaging seats and a fragrance system. Despite some storage limitations, the GLS offered a quiet cabin, a composed ride, and solid dynamics, making it a refined choice in the luxury SUV segment.

The 2025 BMW X3 30 xDrive featured a turbocharged 2.0-liter four-cylinder engine producing 255 horsepower and 295 pound-feet of torque, paired with an eight-speed automatic transmission and standard xDrive AWD. This setup allowed the X3 to achieve a zero-to-60 mph time of six seconds. The engine's broad power curve, aided by a 48-volt mild-hybrid system, contributed to its impressive performance and fuel economy, although real-world mileage fell short of the EPA rating. The M50 xDrive variant offered a more powerful 3.0-liter inline six-cylinder engine with 393 horsepower, achieving 0-60 mph in 4.4 seconds. The X3's sport-tuned suspension and performance tires provided an engaging driving experience, though the ride quality on imperfect roads was less comfortable.

The 2026 Mercedes-Benz GLS 450, powered by a turbocharged 3.0-liter inline-six engine with mild-hybrid assist, delivered 375 horsepower and 369 pound-feet of torque. Coupled with a nine-speed automatic transmission and standard 4Matic AWD, it accelerated from 0-60 mph in 5.8 seconds. The GLS offered multiple driving modes, including Comfort, Eco, Sport, Off-Road, and Individual, with a standard Airmatic adaptive suspension enhancing ride quality. Despite occasional delays in responsiveness, the GLS provided a smooth driving experience, with a maximum towing capacity of 7,700 pounds. The GLS's tailored feel and refined dynamics made it a standout choice among full-size luxury SUVs, offering a quiet cabin and composed ride.

The 2025 BMW X3 offered a spacious interior with a power-adjustable driver's seat providing an excellent view of the road. The dashboard featured a 12.3-inch digital instrument panel and a 14.9-inch touchscreen infotainment system, enhancing the cabin's width. Front seats were comfortable, with optional ventilation, while rear seats were less accommodating. The cargo area provided 31.5 cubic feet of space, with a lightweight cargo cover and additional storage under the load floor.

The 2026 Mercedes-Benz GLS accommodated up to seven passengers, with a six-passenger configuration available. The GLS offered a range of comfort features, including massaging seats and a fragrance system. The third-row seat provided good thigh support, though legroom was snug. Storage options were limited, but the cargo area offered 17.4 cubic feet of space, expandable to 84.7 cubic feet with the second-row seats folded. The GLS's refined interior and spacious seating made it a comfortable choice for families.

The 2025 BMW X3 featured the BMW Curved Display with iDrive 9 software, offering a user-friendly interface with Quick Select. However, issues with profile creation and system responsiveness marred the experience. The navigation system with augmented video provided accurate directions, and wireless Apple CarPlay worked flawlessly, despite challenges with the native infotainment features.

The 2026 Mercedes-Benz GLS boasted dual 12.3-inch displays with the MBUX infotainment system, offering wireless Apple CarPlay and Android Auto, a navigation system with augmented reality, and a standard Burmester surround-sound system. The MBUX system was easy to use, with a digital assistant capable of executing various commands. Despite a minor hiccup with destination recognition, the system performed well overall.

The 2025 BMW X3 came equipped with the Active Driving Assistant suite, including forward collision warning, automatic emergency braking, and lane-keeping assist. The Premium Package added adaptive cruise control and Parking Assistant Plus, while the Driving Assistant Professional Package offered advanced features like Traffic Jam Assistant. The X3 earned a four-star overall rating from the NHTSA.

The 2026 Mercedes-Benz GLS featured nearly 40 safety and driver-assistance systems, including Pre-Safe and Crosswind Assist. While lacking hands-free highway driver-assistance technology, the GLS offered a hands-on system with a touch-sensing steering wheel. The GLS required active driver participation, providing a smooth and refined driving experience when engaged.