2024 Mercedes-Benz GLS vs 2025 Toyota Sienna

The 2024 Mercedes-Benz GLS exuded a refined elegance that, while bordering on understated, promised to age gracefully. Our GLS 450 test vehicle was adorned with striking 22-inch AMG rims, a new silver four-louver grille, and polished metal accents, all set against a lustrous Twilight Blue paint. Inside, the GLS 450 featured a sophisticated Bahia Brown over Black interior, complemented by natural-grain Grey Oak trim, contrast stitching, and polished aluminum accents. The cabin was a testament to Mercedes' commitment to luxury, offering a serene and inviting environment.

In contrast, the 2025 Toyota Sienna embraced its minivan identity with a design that attempted to inject style into its practical form. The trapezoidal grille and upswept body lines gave it a distinctive look, while the Platinum trim introduced new flower-petal wheel designs. Inside, the Sienna Platinum model boasted a Magnetic Gray paint color and a refreshed interior with a woodgrain finish. However, opinions on the interior were mixed, with some finding the design elements less appealing. Despite its attempts at style, the Sienna remained true to its minivan roots, prioritizing practicality and space.

The 2024 Mercedes-Benz GLS 450 was powered by a turbocharged 3.0-liter inline six-cylinder engine with mild-hybrid technology, delivering 375 horsepower and 369 pound-feet of torque. This setup provided smooth and swift acceleration, reaching 60 mph in 5.8 seconds. The GLS 450 featured a nine-speed automatic transmission and a variable 4Matic all-wheel-drive system, offering driving modes like Eco, Comfort, Sport, and Individual. With a towing capacity of 7,700 pounds and a combined fuel economy rating of 21 mpg, the GLS 450 balanced performance and efficiency. Its adaptive air suspension and massive tires contributed to its impressive handling and braking capabilities.

The 2025 Toyota Sienna, on the other hand, relied on a hybrid powertrain with a 2.5-liter four-cylinder engine and a CVT, producing a net 245 horsepower. While not as powerful as the GLS, the Sienna's electric assist motor provided immediate torque, preventing it from feeling sluggish. The Sienna's hybrid system prioritized fuel economy, achieving an EPA rating of 36 mpg in combined driving. However, during testing, it averaged 26.3 mpg. The Sienna offered predictable handling and a smooth ride, though its steering and braking left room for improvement. The XSE trim added a sport-tuned suspension for a slightly more engaging drive.

The 2024 Mercedes-Benz GLS offered a luxurious interior with supple leather surfaces, heated and ventilated front seats, and a commanding view of the road. The second-row captain's chairs provided excellent thigh support, while the third-row seat was snug for adults but suitable for children. Cargo space was practical, with 17.4 cubic feet behind the third row, 42.7 cubic feet behind the second row, and a maximum of 84.7 cubic feet behind the front seats.

The 2025 Toyota Sienna excelled in practicality, with power-adjustable, heated, and ventilated front seats. The second-row captain's chairs with ottoman-style leg rests were a hit, and the third-row seat accommodated adults comfortably. The Sienna offered generous storage space, though finding secure spots for large water bottles was challenging. Cargo capacity was impressive, with 33.5 cubic feet behind the third row, 75.2 cubic feet behind the second row, and a maximum of 101 cubic feet. However, the Sienna's cargo space was less than some rivals due to its non-removable second-row seats.

The 2024 Mercedes-Benz GLS featured the latest MBUX infotainment system with dual 12.3-inch displays. The system offered improved graphics and intuitive operation, though touch-sensitive controls on the steering wheel and center console could be frustrating. The Burmester surround-sound system with Dolby Atmos technology provided an impressive audio experience. MBUX's natural voice recognition and augmented reality navigation were standout features.

The 2025 Toyota Sienna's higher-spec models came with a 12.3-inch digital instrumentation panel and a 12.3-inch touchscreen for the Toyota Audio Multimedia system. The Platinum trim included a four-zone climate control system, a 10-inch head-up display, and a digital rearview mirror. The TAM system offered various connected services, with a digital assistant that responded well to commands. The JBL premium audio system, however, produced excessive bass. The Sienna's climate control and camera systems were appreciated, though the HUD could benefit from additional features.

The 2024 Mercedes-Benz GLS came equipped with over 20 significant safety features, all adjustable through the MBUX system. The advanced driving assistance systems (ADAS) were praised for their smooth operation and subtle interventions. The adaptive cruise control and lane-centering assist systems performed well on various road conditions, with only a minor issue on a two-lane road.

The 2025 Toyota Sienna featured TSS 2.0, an older version of Toyota's safety suite. While lacking some newer features, TSS 2.0 provided a straightforward and effective ADAS experience. The Sienna's lane-centering assist and adaptive cruise control worked well, though human intervention was needed during sudden traffic braking events. The new rear-seat reminder technology was a thoughtful addition, but the Sienna's crash-test ratings were mixed, with a five-star overall rating from NHTSA but lower scores in specific areas.