The Mercedes-Benz GLS 580 V8 (489 Hp) EQ Boost 4MATIC, produced from 2020 to 2021, represents the flagship performance variant of the X167 generation GLS full-size SUV. Positioned as the top-tier offering, it combined a potent twin-turbocharged V8 engine with a 48-volt mild-hybrid system, all-wheel drive, and a sophisticated 9-speed automatic transmission. This model aimed to deliver both luxurious comfort and impressive performance within the premium SUV segment, primarily targeting buyers in North America, Europe, and Asia who desired a high-performance, technologically advanced vehicle with three-row seating.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | GLS |
| Generation | GLS (X167) |
| Type | GLS 580 V8 (489 Hp) EQ Boost 4MATIC 9G-TRONIC |
| Start of production | 2020 |
| End of production | 2021 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | SUV |
| Seats | 7 |
| Doors | 5 |
| Fuel consumption (urban) | 14.4-15 l/100 km (16.3 – 15.7 US mpg) |
| Fuel consumption (extra urban) | 8.4-8.9 l/100 km (28 – 26.4 US mpg) |
| Fuel consumption (combined) | 10.7-11 l/100 km (22 – 21.4 US mpg) |
| CO2 emissions | 245-254 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0-100 km/h | 5.3 sec |
| Acceleration 0-60 mph | 5.0 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Gross battery capacity | 0.9 kWh |
| Battery voltage | 48 V |
| Electric motor power | 22 Hp |
| Electric motor Torque | 250 Nm (184.39 lb.-ft.) |
| Engine Power | 489 Hp |
| Engine Torque | 700 Nm (516.29 lb.-ft.) @ 2000-4000 rpm |
| Engine Displacement | 3982 cm3 (243 cu. in.) |
| Number of cylinders | 8 |
| Engine Configuration | V-engine |
| Kerb Weight | 2470 kg (5445.42 lbs.) |
| Max. weight | 3250 kg (7165.02 lbs.) |
| Fuel tank capacity | 90 l (23.78 US gal) |
| Length | 5207 mm (205 in.) |
| Width | 1956-2030 mm (77.01 – 79.92 in.) |
| Height | 1823-1838 mm (71.77 – 72.36 in.) |
| Wheelbase | 3135 mm (123.43 in.) |
| Transmission | 9-speed automatic (9G-TRONIC) |
Powertrain & Engine Architecture
At the heart of the GLS 580 lies the M176 4.0-liter V8 engine. This engine utilizes direct fuel injection and employs twin turbochargers, one for each bank of cylinders, to deliver substantial power and torque. The engine benefits from a sophisticated valvetrain featuring four valves per cylinder (DOHC) and variable valve timing, optimizing performance across the rev range. Crucially, the GLS 580 incorporates Mercedes-Benz’s EQ Boost system, a 48-volt mild-hybrid architecture. This system features an integrated starter-generator (ISG) that adds 22 horsepower and 250 Nm (184 lb-ft) of torque, assisting the engine during acceleration and enabling features like extended coasting and smoother start/stop operation. The 9G-TRONIC nine-speed automatic transmission is specifically tuned to handle the engine’s output, offering smooth and responsive shifts. The transmission features a wide gear ratio spread, contributing to both performance and fuel efficiency.
Driving Characteristics
The GLS 580 delivers a driving experience that balances performance with the comfort expected of a luxury SUV. The EQ Boost system provides an immediate boost in torque, resulting in strong acceleration from a standstill and during overtaking maneuvers. The 0-60 mph time of around 5 seconds is impressive for a vehicle of this size and weight. The 9G-TRONIC transmission contributes to a refined driving experience, with seamless gear changes. Compared to the GLS 450, the 580 offers significantly more power and a more responsive feel. While not as overtly sporty as some performance SUVs, the GLS 580 provides ample power for confident highway cruising and towing. The air suspension system, standard on this trim, further enhances ride comfort by absorbing road imperfections.
Equipment & Trim Levels
The GLS 580 came standard with a comprehensive suite of luxury features. Interior appointments included premium leather upholstery, multi-contour front seats with massage function, and wood trim. Standard technology included the MBUX infotainment system with a large touchscreen display, a Burmester surround sound system, and a head-up display. Driver assistance features such as adaptive cruise control, lane keeping assist, and automatic emergency braking were also standard. Optional extras included a rear-seat entertainment system, a panoramic sunroof, and various customization options for interior materials and finishes. The GLS 580 essentially included all available options as standard or offered them as minor upgrades, solidifying its position as the range-topping model.
Chassis & Braking
The GLS 580 features an air suspension system as standard, providing adjustable ride height and damping characteristics. This system allows drivers to tailor the suspension to their preferences or driving conditions. The suspension geometry is optimized for both on-road comfort and off-road capability. 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. The GLS 580 also features a robust chassis designed to handle the vehicle’s weight and power.
Market Reception & Comparison
The GLS 580 was generally well-received by automotive critics, who praised its powerful engine, luxurious interior, and advanced technology. However, some reviewers noted the high price tag and the relatively low fuel economy compared to other SUVs in its class. Compared to the GLS 450, the 580 offered a significant performance upgrade but came at a substantial cost premium. Against competitors like the BMW X7 and the Range Rover, the GLS 580 held its own in terms of luxury and technology, offering a compelling alternative for buyers seeking a high-performance, three-row SUV. Reliability reports have been generally positive, with owners reporting few major issues, although the complexity of the engine and hybrid system could potentially lead to higher maintenance costs over the long term.
Legacy
The GLS 580 represents a high point in Mercedes-Benz’s SUV offerings, combining power, luxury, and technology in a compelling package. While the X167 generation GLS has been superseded by newer models, the 580 variant remains a desirable vehicle on the used car market. The M176 engine, with its robust construction and advanced technology, has proven to be relatively reliable, although regular maintenance is crucial to ensure its longevity. The EQ Boost system, while innovative, may require specialized knowledge for servicing. Overall, the GLS 580 is likely to retain its value as a well-equipped, high-performance luxury SUV for years to come.
