Porsche Cayenne vs Mercedes-Benz GLS

The 2025 Porsche Cayenne presented itself as a versatile SUV, available in both a standard model with a squared-off rear end and a sporty Cayenne Coupe. The GTS trim level, which was the focus of our review, featured high gloss black trim, a unique front fascia with larger air intakes, and tinted headlights. Red brake calipers were visible through 21-inch anthracite grey wheels, and the Cayenne Coupe boasted an adaptive rear spoiler. Inside, the Cayenne offered extensive customization options, from the vibrant Carmine Red interior to various trim and seat belt choices. While the pricing could escalate with options like a custom paint job, the Cayenne ensured a unique ownership experience. The cabin was thoughtfully designed, with mechanical controls for essential features and a dashboard-mounted shifter toggle that maximized storage space.

The 2026 Mercedes-Benz GLS lineup included the GLS 450, GLS 580, AMG GLS 63, and Maybach GLS 600, with prices ranging from $125,395 to $247,795 in Canada. Our GLS 450 test vehicle featured 21-inch AMG wheels, the AMG Line Exterior Package, and premium leather upholstery. The GLS's interior, while similar to the smaller GLE, offered high-quality materials and detailing. However, body creaks were noted on chilly mornings. The GLS 450 came standard with leather upholstery, with Nappa leather available, and offered a choice of interior trims. The dual 12.3-inch displays were well-integrated, and the MBUX infotainment system was user-friendly. Despite occasional delays in responsiveness, the GLS provided a tailored driving experience, with a quiet cabin and composed ride.

The 2025 Porsche Cayenne offered a range of engines, starting with a 3.0-litre V6 producing 348 horsepower and 368 pound-feet of torque. The Cayenne S featured a V8 with 468 hp, while the Turbo GT, available only as a coupe, boasted 650 hp. Plug-in hybrid options delivered up to 729 hp. Our GTS-trim tester, with a twin-turbo 4.0-litre V8, produced 493 hp and 486 lb-ft of torque. It accelerated to 100 km/h in 4.4 seconds and reached a top speed of 275 km/h. The GTS's steering, borrowed from the Turbo GT, offered precise turn-in, and the SUV's lowered stance and Pirelli P Zero tires enhanced agility. The GTS excelled in Sport and Sport Plus modes, with responsive steering and a rear-wheel-biased AWD system. Carbon ceramic brakes provided ample stopping power, and the GTS transformed into a comfortable commuter in Normal mode. The Cayenne's versatility allowed for sporty driving without sacrificing daily comfort.

The 2026 Mercedes-Benz GLS 450 featured a turbocharged 3.0-litre inline-six engine with mild-hybrid assist, producing 375 horsepower and 369 pound-feet of torque. Paired with a nine-speed automatic transmission and 4Matic AWD, it accelerated from 0-100 km/h in 6.1 seconds. The GLS 450 offered acceptable fuel economy, rated at 11.3 L/100 km combined. The Dynamic Select system provided various driving modes, including Comfort, Eco, Sport, Off-Road, and Individual. The Airmatic adaptive suspension improved ride and handling, and the GLS had a towing capacity of 3,500 kilograms. While the GLS exhibited occasional delays in responsiveness, it delivered a tailored driving experience with a quiet cabin and composed ride. The GLS's dimensions made it easier to manage in urban settings, and it offered a supple ride and deft handling compared to larger luxury SUVs.

The 2025 Porsche Cayenne offered limited standard features, with eight-way power-adjustable seats and two-zone climate control. The GTS trim added a GT Sport steering wheel and Race-Tex headliner. The options list was extensive, allowing for customization of interior materials and features. The Cayenne accommodated five passengers, with ample headroom in the second row. It had a towing capacity of 3,500 kilograms and a payload capacity of over 635 kilograms. Cargo space was slightly smaller than competitors, with 772 litres behind the second row and 1,708 litres with seats folded. The coupe version offered 576 and 1,486 litres, respectively. The Cayenne Turbo e-hybrid PHEV had reduced cargo space due to the battery.

The 2026 Mercedes-Benz GLS offered standard seven-passenger seating, with a six-passenger configuration available. The GLS provided exceptional comfort, with features like four-zone climate control, heated and ventilated seats, and a heated steering wheel. Upgrades included massaging seats, five-zone climate control, and an executive-style rear seat package. The six-passenger configuration featured power-operated captain's chairs. The third-row seat offered good thigh support, though legroom was snug. Storage was limited, with small door pockets and a stingy centre armrest bin. The GLS had 355 litres of cargo space behind the third row, expanding to 1,209-1,379 litres with the third row folded. Maximum capacity was 2,400 litres, falling short of larger luxury SUVs.

The 2025 Porsche Cayenne featured a 12.6-inch digital gauge cluster and a 12.3-inch touchscreen display with the Porsche Communication Management system. It included wireless Apple CarPlay, Android Auto, Spotify, Apple Music, and a Wi-Fi hotspot. An optional 10.9-inch passenger screen allowed for navigation and media control. The head-up display provided pertinent information, though it appeared dim with polarized sunglasses. The Cayenne had four USB-C charging ports and a cooled wireless charging area.

The 2026 Mercedes-Benz GLS featured dual 12.3-inch displays with the MBUX infotainment system. It included wireless Apple CarPlay, Android Auto, and a navigation system with augmented reality. The standard Burmester surround-sound system offered satisfying audio quality. Options included a head-up display, rear infotainment screens, and a rear passenger tablet. MBUX was user-friendly, with voice commands activated by "Hey Mercedes."

The 2025 Porsche Cayenne offered standard parking sensors, forward collision warning, and blind-spot monitoring. Adaptive cruise control, lane-keeping assist, and lane-departure warning were optional. Porsche's InnoDrive adaptive cruise control system was not tested. The Cayenne had not been rated by NHTSA or IIHS.

The 2026 Mercedes-Benz GLS included nearly 40 safety and driver assistance systems, such as Pre-Safe and Crosswind Assist. It featured parking sensors, a surround-view camera, and a hands-on driver assistance system. The GLS required active driver participation, and its curve speed reduction technology was overly cautious. The GLS braked harder than necessary on exit ramps, but overall, it provided a smooth and refined driving experience.