The Mercedes-Benz GLS 580 V8 (517 Hp) Mild Hybrid 4MATIC, introduced in September 2023 as part of the X167 facelift, represents the flagship performance variant of the third-generation GLS full-size SUV. Positioned as the premium offering within the lineup, it combines substantial power with advanced mild-hybrid technology and a luxurious interior. This model builds upon the foundation of the X167 platform, first introduced in 2019, offering a refined and technologically advanced experience for buyers seeking a high-performance, seven-passenger SUV. The facelift brought updated styling, enhanced technology, and powertrain refinements, solidifying the GLS’s position in the luxury SUV segment.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | GLS |
| Generation | GLS (X167, facelift 2023) |
| Type (Engine) | GLS 580 V8 (517 Hp) Mild Hybrid 4MATIC 9G-TRONIC |
| Start of production | September, 2023 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | SUV |
| Seats | 7 |
| Doors | 5 |
| Combined fuel consumption (WLTP) | 13.5-14.2 l/100 km (17.4 – 16.6 US mpg, 20.9 – 19.9 UK mpg, 7.4 – 7 km/l) |
| CO2 emissions (WLTP) | 305-321 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.9 sec |
| Acceleration 0 – 62 mph | 4.9 sec |
| Acceleration 0 – 60 mph | 4.7 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6e |
| Weight-to-power ratio | 5 kg/Hp, 201.6 Hp/tonne |
| Weight-to-torque ratio | 3.5 kg/Nm, 284.6 Nm/tonne |
| Battery voltage | 48 V |
| Battery technology | Lithium-ion (Li-Ion) |
| Electric motor power | 22 Hp |
| Electric motor Torque | 250 Nm (184.39 lb.-ft.) |
| Electric motor location | Between the combustion engine and the transmission |
| Power | 517 Hp @ 5500 rpm |
| Torque | 730 Nm @ 2250-4500 rpm (538.42 lb.-ft. @ 2250-4500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 177.980 |
| Engine displacement | 3982 cm3 (243 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 92 mm (3.62 in.) |
| Compression ratio | 8.6:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | BiTurbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 9.5 l (10.04 US qt | 8.36 UK qt) |
| Coolant | 15.7 l (16.59 US qt | 13.81 UK qt) |
| Kerb Weight | 2565 kg (5654.86 lbs.) |
| Max. weight | 3300 kg (7275.25 lbs.) |
| Max load | 735 kg (1620.4 lbs.) |
| Trunk (boot) space – minimum | 355 l (12.54 cu. ft.) |
| Trunk (boot) space – maximum | 2400 l (84.76 cu. ft.) |
| Fuel tank capacity | 90 l (23.78 US gal | 19.8 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (12%) | 3500 kg (7716.18 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 140 kg (308.65 lbs.) |
| Length | 5209 mm (205.08 in.) |
| Width | 1956 mm (77.01 in.) |
| Width including mirrors | 2157 mm (84.92 in.) |
| Height | 1823-1928 mm (71.77 – 75.91 in.) |
| Wheelbase | 3135 mm (123.43 in.) |
| Front track | 1669 mm (65.71 in.) |
| Rear (Back) track | 1692 mm (66.61 in.) |
| Front overhang | 938 mm (36.93 in.) |
| Rear overhang | 1136 mm (44.72 in.) |
| Ride height (ground clearance) | 175-290 mm (6.89 – 11.42 in.) |
| Minimum turning circle (turning diameter) | 12.54 m (41.14 ft.) |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Gearbox | 9 gears, automatic transmission G-TRONIC |
| Front suspension | Hydro-pneumatic element, Double wishbone, Air suspension |
| Rear suspension | Hydro-pneumatic element, Independent multi-link suspension, Air suspension |
| Tires size Front | 275/50 R20; 275/45 R21; 285/45 R22; 285/40 R23 |
| Tires size Rear | 275/50 R20; 315/40 R21; 325/40 R22; 325/35 R23 |
| Wheel rims size | 20; 21; 22; 23 |
INTRODUCTION
The GLS 580 V8 represents the pinnacle of performance and luxury within the X167 GLS range. Introduced with the 2023 facelift, it builds upon the already successful formula of the third-generation GLS, offering a compelling blend of space, comfort, and dynamic capability. The X167 generation, launched in 2019, aimed to provide a more refined and technologically advanced experience compared to its predecessor (X166). The 580 variant specifically targets buyers who desire a powerful and sophisticated SUV without compromising on the practicality and versatility expected of the GLS.
Powertrain & Engine Architecture
At the heart of the GLS 580 lies the M177.980 4.0-liter V8 engine, a twin-turbocharged masterpiece. This engine benefits from a 48-volt mild-hybrid system (MHEV), incorporating a belt-driven starter-generator (RSG) that enables functions like extended coasting, automatic engine shut-off during deceleration, and a smoother start-stop experience. The engine utilizes direct fuel injection and sophisticated engine management software to deliver 517 horsepower at 5500 rpm and a substantial 730 Nm (538 lb-ft) of torque between 2250 and 4500 rpm. The 9G-TRONIC nine-speed automatic transmission is standard, optimized to handle the engine’s power and provide smooth, efficient shifts. The transmission features a wide gear ratio spread, contributing to both strong acceleration and relaxed highway cruising.
Driving Characteristics
The GLS 580 delivers a driving experience that is both powerful and surprisingly composed for a vehicle of its size. The combination of the potent V8 engine and the responsive 9G-TRONIC transmission results in brisk acceleration – 0 to 60 mph in approximately 4.7 seconds. The mild-hybrid system enhances responsiveness by filling in torque gaps during acceleration and providing a seamless transition between engine power and electric assistance. While not as overtly sporty as some performance SUVs, the GLS 580 offers ample power for confident overtaking and effortless highway cruising. The air suspension provides a comfortable ride, effectively isolating passengers from road imperfections. The 4MATIC all-wheel-drive system ensures excellent traction in various conditions.
Equipment & Trim Levels
The GLS 580 comes standard with a comprehensive array of luxury features. Interior appointments include premium leather upholstery, heated and ventilated front and rear seats, a panoramic sunroof, and a Burmester surround sound system. Standard technology includes the MBUX infotainment system with a large touchscreen display, augmented reality navigation, and a suite of driver-assistance features such as adaptive cruise control, lane-keeping assist, and automatic emergency braking. Optional extras include massaging seats, a rear-seat entertainment system, and various customization options for interior trim and exterior styling.
Chassis & Braking
The GLS 580 features a sophisticated chassis designed to balance comfort and handling. The air suspension, with its ability to adjust ride height and damping characteristics, plays a crucial role in providing a smooth and controlled ride. The suspension geometry is optimized for stability and reduced body roll. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. The electronic stability program (ESP) and anti-lock braking system (ABS) work in conjunction to enhance safety and control.
Market Reception & Comparison
The GLS 580 has been well-received by automotive critics, praised for its powerful engine, luxurious interior, and comfortable ride. Compared to other GLS variants, such as the GLS 450, the 580 offers a significant performance upgrade, but at a higher price point. Fuel economy is understandably lower than the six-cylinder models, reflecting the V8 engine’s increased power output. Compared to competitors like the BMW X7 and the Cadillac Escalade, the GLS 580 offers a compelling combination of luxury, performance, and technology.
Legacy
The M177/M178 engine family, of which the M177.980 is a member, has proven to be a robust and reliable powerplant. While long-term reliability data for the facelifted 2023 model is still emerging, the underlying engine architecture has a strong track record. The integration of the 48-volt mild-hybrid system is expected to further enhance efficiency and reduce emissions. On the used car market, the X167 GLS 580 is expected to hold its value well, appealing to buyers seeking a high-performance, luxury SUV with a proven pedigree.
