2025 Mercedes-Benz GLS 450 vs 2025 Mercedes-Benz GLS 580
| 2025 Mercedes-Benz GLS 450 | 2025 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 * | 14/19 * |
0-60 Miles Per Hour |
|
| 5.8 seconds ** | 4.7 seconds ** |
Which Full-Size Luxury SUV Is Right for You in Greenwich, CT?
Serving Greenwich CT
Searching for a sophisticated and powerful SUV for your family in Fairfield County? The 2025 Mercedes-Benz GLS 450 and 2025 GLS 580 both offer exceptional comfort, high-end technology, and premium performance — all wrapped in the unmistakable style of Mercedes-Benz. But how do they differ? Here’s what you should know before scheduling your test drive at Mercedes-Benz of Greenwich.
How Do the GLS 450 and GLS 580 Compare in Performance?
Whether you’re heading into Stamford traffic or planning a scenic drive up the Merritt Parkway, performance matters. Both GLS models offer standard 4MATIC® all-wheel drive and a 9-speed automatic transmission, but differ under the hood:
- The GLS 450 features a turbocharged 3.0L inline-6 engine with EQ Boost, producing 375 horsepower and 369 lb-ft of torque — perfect for refined, everyday performance.
- The GLS 580 upgrades to a 4.0L biturbo V8 with EQ Boost, delivering 510 horsepower and 538 lb-ft of torque for drivers who demand thrilling acceleration and power on demand.
Both trims ensure confident handling in all seasons across Greenwich, Westport, and New Canaan.
What Exterior Differences Set These Models Apart?
Both versions of the 2025 GLS make a bold entrance with elevated style and presence. Key exterior design elements include:
- Standard LED headlamps with distinctive light signatures
- Iconic Mercedes-Benz grille with chrome accents and upright proportions
- Power liftgate, roof rails, and a muscular stance
The GLS 450 comes with 21-inch alloy wheels and elegant design lines. The GLS 580 enhances the aesthetic with 22-inch wheels, performance tires, and sportier accents for an even more commanding look across the Greenwich area.
What Interior Amenities Can You Expect in Each Model?
Inside the GLS, luxury is standard — but elevated even further in the 580. Both SUVs feature:
- MBUX infotainment with 12.3-inch digital displays
- Heated front seats, wireless charging, and ambient lighting
- Power-folding third-row seats, panoramic sunroof, and five USB-C ports
- Safety features like lane-keeping assist, augmented reality navigation, and adaptive cruise control
The GLS 580 adds even more with leather upholstery, a heated steering wheel, soft-close doors, and five-zone climate control, perfect for discerning families throughout Fairfield County.
Which GLS Model Fits Your Lifestyle in Greenwich?
- Choose the GLS 450 if you want exceptional comfort, advanced tech, and strong performance at a more accessible price point.
- Choose the GLS 580 if you prioritize bold V8 power, exclusive luxury amenities, and an elevated driving experience on Connecticut’s roads.
No matter which you select, both GLS trims offer three-row versatility, intelligent safety systems, and the prestige of the Mercedes-Benz name.
Test Drive the Mercedes-Benz GLS in Greenwich, CT Today
At Mercedes-Benz of Greenwich, we proudly serve drivers from Greenwich to Stamford and beyond. Whether you’re looking to lease or buy your next luxury SUV, our knowledgeable team is here to guide you through the decision between the 2025 GLS 450 and GLS 580.
Schedule your test drive online or visit our showroom in Greenwich, CT today to explore our current GLS inventory and experience refined performance for yourself.
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.