The S-Class has been the designation for top-of-the-line Mercedes-Benz sedan since it was introduced in 1972. S-Class stands for "special class" and as the brand’s flagship model, represents the pinnacle of luxury and technological innovation. But as the popularity of sedans decline, and the demand for SUVs rise, Mercedes-Benz has added a flagship SUV to their lineup, combining similar luxury and technology but in a more spacious vehicle. Today, taking stage next to the flagship S-Class sedan is the Mercedes-Benz GLS-Class SUV.
The GLS, formerly called the GL-Class, is a full-size, three-row luxury SUV produced by Mercedes-Benz. Debuting in 2006 and currently in its third generation since 2020, the GLS boasts a sophisticated and bold exterior design, seamlessly blending sleek aerodynamics with luxurious styling cues. It’s a big vehicle and its large, upright stance is accentuated by a prominent grille, stylish LED headlights and that bold three-pointed star. There is no denying this is anything other than a Mercedes-Benz.
The GLS competes with the BMW X7 and Land Rover Ranger Rover, as well as the Cadillac Escalade and Lincoln Navigator, although the latter two are somewhat larger. The GLS is offered with two different engines and three trim levels.
As the GLS450, the GLS is equipped with a turbocharged 3.0-liter inline six-cylinder engine that makes 375 horsepower and 369 lb-ft of torque and is fitted with 21-inch wheels. The GLS580 comes with a turbocharged 4.0-liter V8 that is good for 510 horsepower and 538 lb-ft of torque. It rides on 22-inch wheels. For the ultimate performing GLS, opt for the AMG GLS63. Going this route increases the V8 power to 603 hp and 627 lb-ft of torque and gets a performance tuned suspension. Every GLS comes equipped with all-wheel drive and a nine-speed automatic transmission.
Inside, there's plenty of room inside the GLS's modern, upscale cabin, with seating for seven, but it can be spec'd out to seat six with the no-cost optional second-row captain's chairs. Passenger space is generous in the first and second rows, and the third-row, while not as spacious as the second, can accommodate adults without too much complaining. That third-row seat is a power-folding 50/50-split, so it can be easily tucked away. Behind that third-row, there is 17.4 cubic feet of cargo space, with that number expanding to 42.7 cubic feet with it folded down. Putting down both rear rows of seats opens 84.7 cubic feet - making the GLS cargo capabilities quite adequate.
The dashboard is made up of two huge 12.3-inch digital displays. One serves as reconfigurable gauges for the driver, while the other handles infotainment duties including Mercedes-Benz's MBUX software, and the built-in navigation and audio systems. The infotainment system also includes Apple CarPlay and Android Auto functionality and a high-speed internet hotspot. The screen's graphics are crisp and clear and the system can be controlled by touchscreen, a touchpad on the center console, or by a small slider control on the steering wheel. All GLS models come with a 13-speaker Burmester Surround Sound stereo, with an upgraded 26-speaker version available as an option.
Then there are the neat, little features. Like the soft pillows attached to the headrests - perfect for nap taking. Also, all four doors include soft-close features, great for smaller children that might lack the strength to fully close the vault-like rear doors. And check off the right options and you get heated arm rests in the front two rows and even heated seats for the third-row.
On the road, the GLS delivers an amazingly solid and comfortable ride, thanks to the standard adjustable air suspension. Regardless of which GLS you opt for, they are all quick. The base GLS450 can hit 60 mph in just 5.5 seconds. The tester, a GLS580 with its 510 horses packed under the hood, accomplishes that same task a second quicker, in about 4.5 seconds. Hot-rodders will appreciate the GLS63 as it can scoot to 60 mph in a scant 3.7 seconds. As you can see, there is no slow GLS, instead the question is, how fast do you want to go?
Luxurious, fast and being a flagship model from a German luxury maker, the Mercedes-Benz GLS doesn't come cheap. The base GLS450 starts at $90,350. The tester arrived with an MSRP of $126,210. The AMG GLS63 starts at more than $150,000.
The 2025 Mercedes-Benz GLS combines luxury and performance like no other. It comes loaded with features and has three rows of seats - all in first class. Think of the iconic S-Class in SUV form - and you've got the GLS.