The 2026 GLS 450 produces 375 horsepower, while the GLS 580 generates 510 horsepower from a V8.Buyers must choose between maximizing daily efficiency or accessing peak twin-turbocharged acceleration for highway driving.Review the exact specification differences below before exploring our available inventory in the Glendale area.Finding the right luxury vehicle requires understanding your daily driving habits.Families seeking a capable daily driver often lean toward the inline-6 engine, while drivers who prioritize aggressive highway merging prefer the V8 configuration.You can filter by exact engine types in our Glendale Mercedes-Benz GLS inventory to match your requirements.
Both configurations share the same core architecture. For a full breakdown of the shared dimensions and cabin amenities, review our complete 2026 Mercedes-Benz GLS capabilities guide.The primary difference lies in the powertrain capabilities.
The GLS 450 utilizes a robust inline-6 engine. This system provides remarkably smooth power delivery, translating to seamless acceleration away from stoplights without jarring the cabin.It is the ideal setup for comfortable navigation through suburban neighborhoods.
The GLS 580 steps up to a larger biturbo engine.This massive output means the vehicle rarely has to work hard, resulting in quiet, effortless passing power on Interstate 43 even when fully loaded with passengers and cargo.
| Feature | GLS 450 4MATIC® SUV | GLS 580 4MATIC® SUV |
|---|---|---|
| Engine | 3.0L Inline-6 Turbo with mild hybrid | 4.0L V8 Biturbo with mild hybrid |
| Horsepower | 375 HP | 510 HP |
| Torque | 369 lb-ft | 538 lb-ft |
| 0 to 60 mph Acceleration | 5.8 seconds | 4.7 seconds |
Both models feature standard 4MATIC® all-wheel drive. This technology actively distributes torque between the front and rear axles.For Glendale drivers, this translates to instant traction adjustments during unpredictable Wisconsin snowstorms, keeping the vehicle stable on slippery road surfaces.You can review the underlying technical parameters of this drivetrain on the official Mercedes-Benz performance portal.