2026 Mercedes-Benz GLS 450 vs 2026 Mercedes-Benz GLS 580
| 2026 Mercedes-Benz GLS 450 | 2026 Mercedes-Benz GLS 580 |
Engine |
|
| 3.0L inline-6 turbo with mild hybrid drive | 4.0L V8 biturbo with mild hybrid drive |
Horsepower |
|
| 375 hp | 510 hp |
MPG (City/Highway) |
|
| 19/24 * | 14/20 * |
0-60 Miles Per Hour |
|
| 5.8 seconds ** | 4.7 seconds ** |
2026 Mercedes-Benz GLS 450 vs 2026 Mercedes-Benz GLS 580
Serving Warwick, RI
The poignant GLS is the largest and most luxurious SUV in the 2026 Mercedes-Benz lineup. With three rows of seating and impressively effortless power, the GLS is a force to be reckoned with. In 2026, three trim levels will be available. These are the GLS 450, the GLS 580, and the Mercedes-AMG® GLS 63. How do the GLS 450 and the GLS 580 compare?
Performance
A 3.0-liter inline-six gas engine with a mild-hybrid system powers the 2026 GLS 450. This system puts out 375 horsepower and 369 pound-feet of torque. This trim level also includes standard 4MATIC® all-wheel drive, a nine-speed automatic transmission, descent control, and a center-limited-slip differential.
The GLS 580 is equipped with a V8, 4.0-liter turbo engine with a mild-hybrid component. With this system, you’ll benefit from 510 horsepower and 538 pound-feet of torque. The GLS 580 has the same mechanical equipment as the GLS 450.
Appearance
The captivating GLS makes a strong statement on the road thanks to its bold dimensions and sophisticated design. With a tall, well-defined hood and subtly descending roof, the GLS stands prominently. At the same time, the open-spoke wheel design and the undulating side contouring convey individuality. At the front, the grille features thick chrome bars. Standout, body-colored elements frame the large air inlets. Angled LED lights bolster the almost rectangular headlights. Both trim levels have a hands-free liftgate and a panoramic sunroof. The 580 adds illuminated running boards, soft-close doors, and larger wheels.
Features
The GLS 450 is equipped with an impressive selection of elite features. Some of its standard features include a 12.3-inch central display, a premium sound system with 13 speakers, a navigation system with an augmented reality overlay, a wireless charging pad, heated front seats, a power-folding third row, synthetic leather upholstery, and more.
The 580 builds on the GLS 450’s features with a five-zone automatic climate control system, leather upholstery, a heated steering wheel, heated second-row seats, massaging front seats, and several additional features.
Test Drive the 2026 Mercedes-Benz GLS Today
At Mercedes-Benz of Warwick, we’re honored to support you with your deep look at the 2026 GLS. To explore our current inventory, visit our showroom today and speak with one of our friendly associates.
2026 Mercedes-Benz GLS 450 vs 2026 Mercedes-Benz GLS 580 FAQs
What is the main difference between the 2026 Mercedes-Benz GLS 450 and GLS 580?
The primary difference is performance and engine configuration. The 2026 Mercedes-Benz GLS 450 features a 3.0-liter inline-six turbo engine with mild-hybrid assistance producing 375 horsepower, while the 2026 Mercedes-Benz GLS 580 upgrades to a 4.0-liter V8 biturbo engine with mild-hybrid technology delivering 510 horsepower.
Which Mercedes-Benz GLS trim is more powerful?
The 2026 Mercedes-Benz GLS 580 is significantly more powerful, offering 510 horsepower and 538 lb-ft of torque compared to the GLS 450’s 375 horsepower and 369 lb-ft of torque. The GLS 580 delivers stronger acceleration and enhanced towing capability.
Do both the 2026 GLS 450 and GLS 580 include 4MATIC® all-wheel drive?
Yes. Both the 2026 Mercedes-Benz GLS 450 and GLS 580 come standard with 4MATIC® all-wheel drive, along with a nine-speed automatic transmission, descent control, and a center-limited-slip differential for confident handling.
What luxury features are included in the 2026 GLS 450?
The 2026 Mercedes-Benz GLS 450 includes premium features such as a 12.3-inch central display, a premium surround-sound system, augmented-reality navigation, wireless charging, heated front seats, a panoramic sunroof, power-folding third-row seats, and synthetic leather upholstery.
What additional features does the 2026 Mercedes-Benz GLS 580 offer?
The GLS 580 builds on the GLS 450 with upgraded amenities, including leather upholstery, five-zone automatic climate control, heated second-row seats, a heated steering wheel, massaging front seats, illuminated running boards, soft-close doors, and larger alloy wheels.
Is the 2026 Mercedes-Benz GLS a three-row SUV?
Yes. Both the 2026 Mercedes-Benz GLS 450 and GLS 580 are full-size, three-row luxury SUVs with seating for up to seven passengers and flexible cargo space.
Which GLS model is better for performance-focused drivers?
Drivers prioritizing performance and V8 power may prefer the 2026 Mercedes-Benz GLS 580 for its higher horsepower and torque. The GLS 450 remains a strong choice for those seeking a balance of efficiency and luxury.
Where can I test drive the 2026 Mercedes-Benz GLS 450 or GLS 580?
You can explore and test-drive both models at Mercedes-Benz of Warwick and compare their performance, features, and trim options in person.
The 2026 Mercedes-Benz GLS 450 and GLS 580 each deliver full-size luxury SUV capability, with the GLS 580 offering enhanced V8 performance and additional premium features for drivers seeking a higher level of refinement.
Images are for illustration purposes only.
* EPA estimated fuel economy. Compare the estimated mpg to the estimated mpg of other vehicles. You may get different mileage depending on how fast you drive, weather conditions and trip length. Your actual highway mileage will probably be less than the highway estimate.
** Stated rates of acceleration are estimated based upon manufacturer’s track results and may vary depending on model, environmental and road surface conditions, driving style, elevation and vehicle load.