2025 Mercedes-Benz GLS-Class Expert Review
Reviewed by Alex Leanse
The biggest of all Mercedes-Benz SUVs is the GLS-Class. Originally known as the GL-Class, this three-row luxury SUV has been in production since 2007. On sale today is the third-generation model, which arrived for 2020 and underwent a refresh for 2024. The lineup includes a sporty AMG version and ultra-luxurious Maybach model. Built in Alabama, the GLS-Class competes against the likes of the Cadillac Escalade, Rivian R1S, and Infiniti QX80.
What’s New
- Biometric fingerprint scanner becomes standard
- GLS63 gets AMG crest imprinted on front headrests
- Many new Manufaktur special-order paint and interior finishes offered
What We Think
Given its position at the top of Mercedes’ SUV range, the GLS-Class should be the nicest, just like the S-Class is at the pinnacle of Mercedes’ sedan lineup—right? For the most part, yes.
There’s certainly no shortage of luxury. Inside, premium materials line an attractive cabin highlighted by big-screen tech and colorful ambient lighting. However, unlike in the S-Class, there are a few more bits of plastic than might be warranted for ultimate luxury. Then again, this is meant for a different sort of duty cycle, and there’s always the Maybach GLS600.
Aside from a transmission that could shift more smoothly, there’s not much to gripe about in the GLS’ dynamics. Its engines are powerful and smooth, and this big SUV belies its size with spry, engaging handling. The GLS63 is a roaring beast that shows AMG’s tuning acumen.
Drivers seeking an SUV for three-row functionality might look elsewhere than the GLS-Class, as its third row and cargo area are on the smaller side for the segment. Aside from that, though, it’s quite a worthy range-topper among Mercedes SUVs.
Performance and MPGs
As before, all 2025 GLS-Class engines are paired with a nine-speed automatic transmission and AWD.
2025 Mercedes-Benz GLS450
- Engine: 3.0-liter turbocharged inline-six
- Horsepower/Torque: 375 hp/369 lb-ft
- Efficiency (city/highway): 19/24 mpg
- Acceleration (0–60 mph): 5.5 seconds
2025 Mercedes-Benz GLS580
- Engine: 4.0-liter twin-turbocharged V-8
- Horsepower/Torque: 510 hp/538 lb-ft
- Efficiency (city/highway): 14/19 mpg
- Acceleration (0–60 mph): 4.1 seconds
2025 Mercedes-Maybach GLS600
- Engine: 4.0-liter twin-turbocharged V-8
- Horsepower/Torque: 550 hp/538 lb-ft
- Efficiency (city/highway): 13/18 mpg
- Acceleration (0–60 mph): 4.2 seconds
2025 Mercedes-Benz GLS63
- Engine: 4.0-liter twin-turbocharged V-8
- Horsepower/Torque: 603 hp/627 lb-ft
- Efficiency (city/highway): 14/18 mpg
- Acceleration (0–60 mph): 3.7 seconds
Is There a Mercedes 3-Row EV?
For drivers seeking a family-friendly luxury SUV with electric power, the Mercedes EQS SUV could be an option. Although less rugged and spacious than the GLS-Class, the EQS SUV is packed with technology features and comfortable appointments, along with a smooth, silent EV powertrain. The GLS-Class may go all-electric someday, but the EQS SUV is the closest thing to it for now. Just like the GLS, too, there’s a Maybach version of the EQS SUV.
Safety Features
Standard driver assist and active safety features in the 2025 GLS-Class include front automatic emergency braking, intersection collision avoidance, rear and side cross-traffic alert, blind-spot monitoring, lane keep assist, adaptive cruise control, emergency evasive steering assist, rain-sensing windshield wipers, automatic high-beams, and more.
Cargo Space and Interior Room
Although the GLS-Class is Mercedes’ biggest SUV, it’s still smaller inside than some of its segment rivals. Cargo capacity in particular is considerably less than in some three-row SUVs.
Technology
Standard on every GLS model is an infotainment setup comprising two 12.3-inch digital displays. Ahead of the driver is a gauge cluster, while beside it is the infotainment touchscreen, which can also be controlled by a touchpad on the center console. Apple CarPlay, Android Auto, and built-in navigation are standard. There are several USB ports distributed through the cabin, and there’s a wireless charging pad in the front row. A biometric fingerprint scanner used to authenticate and load different user profiles becomes standard equipment for 2025. Optional technology upgrades include a Burmester audio system, augmented reality navigation, a head-up display, and Wi-Fi hot spot functionality.
Which 2025 GLS-Class Trim Level Is Best?
The GLS450 is so solid and capable, it makes its V-8-powered counterparts seem superfluous. The Maybach GLS600 finds distinction with amazing luxury, and the AMG GLS63 thrills with high performance, so they have their own delightfully excessive place in the range. The GLS580 is powerful and packed with luxury features but doesn’t quite have enough to prove that it’s the model to choose. We think most drivers seeking a Mercedes three-row SUV will be well suited by the standard GLS450, which starts at slightly more than $90,000.
