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2026 Mercedes-Benz GLS 450 vs GLS 580
The 2026 GLS 580 generates 135 more horsepower than the GLS 450. Both SUVs feature standard 4MATIC® all-wheel drive and mild-hybrid assistance. Browse our premium luxury SUV inventory below to discover your preferred engine.
Engine Specifications and Performance
Choosing between the 2026 GLS 450 and the GLS 580 comes down to how you prefer your power delivered. We invite you to explore our available GLS trim configurations to experience these powertrain differences firsthand. The GLS 450 uses a 3.0-liter inline-6 turbo producing 375 horsepower and 369 lb-ft of torque, delivering smooth highway cruising and immediate throttle response for daily commuting around Tuscaloosa.
The GLS 580 elevates performance with a 4.0-liter V8 biturbo generating 510 horsepower and 538 lb-ft of torque. The practical translation is simple: the V8 delivers commanding, effortless acceleration even when the vehicle is fully loaded with passengers and cargo. If you frequently travel long distances or prefer the authoritative feel of a V8, the GLS 580 is the definitive choice. For a complete breakdown of every trim, read our comprehensive GLS model overview.
| Specification | 2026 GLS 450 4MATIC® | 2026 GLS 580 4MATIC® |
|---|---|---|
| Engine | 3.0L inline-6 turbo (mild hybrid) | 4.0L V8 biturbo (mild hybrid) |
| Horsepower | 375 hp | 510 hp |
| Torque | 369 lb-ft | 538 lb-ft |
| 0 to 60 mph | 5.8 seconds | 4.7 seconds |
| Maximum towing | Up to 7,700 lbs | Up to 7,700 lbs |
Towing and Capability
Despite their different engines, both models share a robust architecture and a maximum towing capacity of up to 7,700 lbs, when properly equipped. The real-world translation is that you can confidently pull a large boat or travel trailer to the lake without sacrificing ride quality or cabin tranquility. Both also use the intelligent 4MATIC® system to route torque to the wheels with the most grip during heavy seasonal rainstorms. You can verify equipment details on the GLS 450 page at Mercedes-Benz USA.
Interior Appointments and Features
Both models share the same cavernous cabin, offering seven seats standard with an optional six-seat executive configuration. The GLS 450 features MB-Tex upholstery and heated front seats, while the GLS 580 upgrades to standard leather and adds five-zone automatic climate control, so passengers in the second and third rows control their exact cooling preferences during hot Alabama summers. You can compare efficiency figures at fueleconomy.gov.
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