The Mercedes-Benz GLA 45 S (H247, facelift 2023) represents the pinnacle of performance within the second-generation GLA compact SUV lineup. Introduced with the 2023 facelift, this variant boasts a potent 2.0-liter turbocharged four-cylinder engine producing 421 horsepower, paired with an 8-speed dual-clutch transmission (AMG SPEEDSHIFT DCT 8G) and a sophisticated 4MATIC+ all-wheel-drive system. Positioned as the flagship model, the GLA 45 S caters to enthusiasts seeking a high-performance SUV with a luxurious interior and advanced technology.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | GLA |
| Generation | GLA (H247, facelift 2023) |
| Type | AMG GLA 45 S (421 Hp) 4MATIC+ AMG SPEEDSHIFT DCT 8G |
| Start of production | 2023 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Combined fuel consumption (WLTP) | 9.5-10 l/100 km (24.8 – 23.5 US mpg, 29.7 – 28.2 UK mpg, 10.5 – 10 km/l) |
| CO2 emissions (WLTP) | 215-227 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.3 sec |
| Acceleration 0 – 62 mph | 4.3 sec |
| Acceleration 0 – 60 mph | 4.1 sec |
| Maximum speed | 270 km/h (167.77 mph) |
| Emission standard | Euro 6e |
| Weight-to-power ratio | 4 kg/Hp, 248.4 Hp/tonne |
| Weight-to-torque ratio | 3.4 kg/Nm, 295 Nm/tonne |
| Power | 421 Hp @ 6750 rpm |
| Power per litre | 211.5 Hp/l |
| Torque | 500 Nm @ 5000-5250 rpm (368.78 lb.-ft. @ 5000-5250 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | M 139.980 |
| Engine displacement | 1991 cm3 (121.5 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 92 mm (3.62 in.) |
| Compression ratio | 9:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection and Multi-port manifold injection |
| Engine aspiration | Twin-scroll turbo, Intercooler |
| Valvetrain | DOHC, CAMTRONIC |
| Engine oil capacity | 5.8 l (6.13 US qt | 5.1 UK qt) |
| Kerb Weight | 1695 kg (3736.84 lbs.) |
| Max. weight | 2270 kg (5004.49 lbs.) |
| Max load | 575 kg (1267.66 lbs.) |
| Trunk (boot) space – minimum | 435 l (15.36 cu. ft.) |
| Trunk (boot) space – maximum | 1430 l (50.5 cu. ft.) |
| Fuel tank capacity | 51 l (13.47 US gal | 11.22 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Permitted trailer load with brakes (12%) | 1500 kg (3306.93 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 80 kg (176.37 lbs.) |
| Length | 4436 mm (174.65 in.) |
| Width | 1849 mm (72.8 in.) |
| Width including mirrors | 2020 mm (79.53 in.) |
| Height | 1590 mm (62.6 in.) |
| Wheelbase | 2729 mm (107.44 in.) |
| Front track | 1615 mm (63.58 in.) |
| Rear (Back) track | 1593 mm (62.72 in.) |
| Front overhang | 927 mm (36.5 in.) |
| Rear overhang | 780 mm (30.71 in.) |
| Minimum turning circle | 12.3 m (40.35 ft.) |
| Drivetrain Architecture | All wheel drive (4×4). ICE drives front wheels, rear driven by clutch. |
| Number of gears and type of gearbox | 8 gears, automatic transmission AMG SPEEDSHIFT DCT |
| Front suspension | Independent, McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 255/40 R20; 275/40 R21 |
| Wheel rims size | 20; 21 |
INTRODUCTION
The GLA 45 S, part of the H247 facelift introduced in 2023, represents a significant upgrade to the already capable GLA platform. Built on the 1HX0/A3 platform shared with other compact Mercedes-Benz models, the GLA 45 S distinguishes itself through its high-performance engine, advanced drivetrain, and sporty styling. It aims to deliver a thrilling driving experience within the practical confines of a compact SUV, appealing to buyers who desire both performance and versatility. This model year brought styling updates, enhanced technology, and refinements to the already potent powertrain.
Powertrain & Engine Architecture
At the heart of the GLA 45 S lies the M139.980 2.0-liter inline-four engine, a marvel of engineering. This engine is hand-assembled under the “one man, one engine” philosophy, ensuring meticulous quality control. It features a twin-scroll turbocharger, direct fuel injection, and multi-port manifold injection, maximizing power and efficiency. The engine’s aluminum block and head contribute to its relatively lightweight construction. The valvetrain utilizes a Double Overhead Camshaft (DOHC) configuration with CAMTRONIC variable valve timing, optimizing performance across the rev range. The AMG SPEEDSHIFT DCT 8G transmission is an 8-speed dual-clutch unit, renowned for its rapid and precise gear changes. This transmission features multiple driving modes, including a Race Start function for optimal acceleration.
Driving Characteristics
The GLA 45 S delivers exhilarating acceleration, achieving 0-60 mph in approximately 4.1 seconds. The dual-clutch transmission provides seamless shifts, and the 4MATIC+ all-wheel-drive system ensures optimal traction in various conditions. The gear ratios are tuned for performance, with shorter ratios in the lower gears for quick acceleration and longer ratios for efficient cruising. Compared to lower-powered GLA variants, the 45 S offers a significantly more responsive and engaging driving experience. While the ride can be firm due to the sporty suspension setup, it remains reasonably comfortable for daily driving. The exhaust note is also more aggressive, adding to the overall sporty character.
Equipment & Trim Levels
The GLA 45 S comes standard with a comprehensive suite of features, including premium leather upholstery, heated and ventilated front seats, a panoramic sunroof, and a high-end Burmester sound system. The MBUX infotainment system with a touchscreen display, voice control, and navigation is also standard. Optional extras include advanced driver-assistance systems such as adaptive cruise control, lane-keeping assist, and a head-up display. Interior trim options typically include aluminum or carbon fiber accents, allowing for a degree of personalization.
Chassis & Braking
The GLA 45 S features a performance-tuned chassis with independent suspension at all four corners. The front suspension utilizes a McPherson strut design, while the rear employs a multi-link setup. Both ends are equipped with stabilizer bars to reduce body roll during cornering. The braking system consists of ventilated discs on all wheels, providing ample stopping power. The AMG braking system, available as an option, features larger rotors and calipers for even greater performance. The steering is precise and responsive, offering good feedback to the driver.
Market Reception & Comparison
The GLA 45 S has been generally well-received by automotive critics, praised for its impressive performance, luxurious interior, and advanced technology. However, some reviewers have noted the firm ride quality and relatively high price tag. Compared to other GLA variants, the 45 S offers a substantial performance upgrade but comes at a premium. It competes with other high-performance compact SUVs such as the BMW X2 M35i and the Audi SQ2. Fuel economy, while respectable for a vehicle of this performance, is lower than that of the base GLA models.
Legacy
The M139 engine family, as used in the GLA 45 S, has proven to be a robust and reliable powertrain. While long-term reliability data is still emerging for the 2023 facelift model, the engine has generally demonstrated good durability in previous iterations. The GLA 45 S is expected to hold its value well in the used car market, appealing to enthusiasts seeking a high-performance compact SUV. Its combination of power, luxury, and technology positions it as a desirable and collectible vehicle.
