The new Mercedes-AMG GLA 45 redefines the compact performance SUV segment, offering a thrilling blend of everyday practicality and exhilarating sports car dynamics. Whether it’s conquering the racetrack or navigating weekend getaways, the Mercedes Gla 45 stands ready for any adventure. This nimble all-rounder packs a punch that will impress even seasoned sports car enthusiasts, thanks to its groundbreaking 2.0-liter engine – the most powerful series-produced four-cylinder turbo engine in the world. Delivering a staggering 382 hp, the Mercedes GLA 45 surpasses its predecessor in power and performance, establishing a new benchmark in its class. Coupled with the active and fully-variable AMG Performance 4MATIC+ all-wheel drive, power is distributed with pinpoint precision, ensuring exceptional traction in all driving conditions. This sophisticated system, featuring AMG TORQUE CONTROL and a new rear axle differential with multi-disc clutches for each rear wheel, allows for a driving experience that is both dynamic and confidently controlled.
The Heart of Performance: Innovative Turbocharged Engine
At the core of the Mercedes GLA 45 lies the newly developed M139 2.0-liter engine. This powerhouse is not just any four-cylinder; it’s the world’s most potent turbocharged four-cylinder engine in series production. Producing an impressive 382 hp and 354 lb-ft of torque in the GLA 45, this engine surpasses its predecessor, setting new standards for compact SUV performance. Each engine is meticulously handcrafted in Affalterbach, adhering to the prestigious “One Man, One Engine” principle, a testament to AMG’s commitment to precision and quality.
This compact performance SUV achieves breathtaking acceleration, sprinting from zero to 60 mph in a mere 4.3 seconds (est.). The top speed is electronically limited to 155 mph, ensuring responsible yet thrilling performance. Beyond sheer power, the engine impresses with its remarkably quick responses. AMG engineers have meticulously crafted the torque curve – “torque shaping” – to deliver peak torque of 354 lb-ft across a broad range from 4,750 to 5,000 rpm. This intelligent engine design results in a power delivery that mirrors the responsiveness of a naturally aspirated engine, offering a linear and engaging driving experience.
The M139 engine within the Mercedes GLA 45 is packed with intelligent design features. Unlike the transverse four-cylinder engines in the 35-series AMG models, this engine is rotated 180 degrees on its vertical axis. This repositioning places the turbocharger and exhaust manifold at the rear, towards the firewall, while the intake system is positioned at the front. This configuration enables a flatter and more aerodynamically efficient front-end design. Furthermore, this new layout optimizes airflow with shorter, less convoluted ducts for both intake and exhaust, enhancing engine efficiency and responsiveness.
The new twin-scroll turbocharger is engineered to deliver both rapid responsiveness at lower engine speeds and substantial power in the higher rpm range. For the first time, the compressor and turbine wheel shaft are mounted on anti-friction bearings, significantly reducing mechanical friction within the turbocharger. This innovation allows the turbocharger to respond swiftly, reaching speeds up to 169,000 rpm rapidly. With a maximum charge pressure of 2.1 bar, the 2.0-liter four-cylinder turbo engine leads its segment in turbocharging technology. The electronically controlled wastegate (exhaust relief valve) provides even more precise and flexible charge pressure management, optimizing responsiveness, particularly during acceleration from partial load.
To further optimize performance, the high-performance four-cylinder engine in the Mercedes GLA 45 features a two-stage fuel injection system. In the first stage, highly precise piezo injectors deliver fuel directly into the combustion chambers at pressures up to 200 bar, controlled by the engine management system. The second stage employs additional intake manifold injection using solenoid valves, crucial for achieving the engine’s exceptional specific output. The electronically controlled fuel supply operates at a pressure of 6.7 bar, ensuring consistent and efficient fuel delivery.
Managing the high output of the engine requires a sophisticated cooling system. This system is designed to cool the cylinder head and crankcase to different temperature levels. This innovative approach allows for a cooler cylinder head, maximizing power and enabling efficient ignition timing, while maintaining a warmer crankcase to minimize in-engine friction. A mechanical water pump cools the cylinder head, while a second, electrically driven high-performance water pump manages crankcase cooling. After a cold start, the electric pump remains inactive until the engine warms up, then it is regulated by the engine control unit to maintain optimal crankcase temperature based on driving conditions.
Dynamic Power Delivery: AMG SPEEDSHIFT DCT 8-Speed Transmission & 4MATIC+
Contributing significantly to the agile and dynamic character of the Mercedes GLA 45 is the 8-speed AMG SPEEDSHIFT DCT 8-speed dual-clutch transmission. The gear ratios are precisely calibrated to provide exceptionally responsive acceleration across the entire speed range, coupled with rapid gear changes and optimized transitions when shifting up. Depending on the selected AMG DYNAMIC SELECT driving mode, the driver experiences distinct drive configurations with varying accelerator and gearshift characteristics.
The standard RACE-START function unleashes maximum acceleration from a standstill, delivering an exhilarating display of performance. This feature is complemented by the evocative drive sound, featuring partial ignition interruption during upshifts and an automatic double-declutching function during downshifts. Despite its performance focus, the Mercedes GLA 45 also incorporates efficiency-enhancing features. In “Comfort” mode, the ECO start/stop function is active, and the “gliding” function can be engaged in “Individual” driving mode.
The fully variable AMG Performance 4MATIC+ all-wheel drive system is integral to the Mercedes GLA 45’s highly dynamic driving experience. The key innovation is AMG TORQUE CONTROL within the new rear axle differential. This system utilizes two electronically controlled multi-disc clutches, each connected to a rear axle drive shaft. This allows not only for variable power distribution between the front and rear axles but also selective distribution between the left and right rear wheels. The result is consistently optimized traction, even in challenging road conditions or during extreme cornering, such as on a closed race circuit.
The control of drive torque distribution to the front and rear axles, and between the rear wheels, is electromechanical. Factors influencing torque distribution include driving speed, lateral and longitudinal acceleration, steering angle, wheel speed differences, gear selection, and accelerator position. Electromechanical control offers significant advantages over electrohydraulic systems, primarily due to its faster response and speed-independent actuation across the entire adjustment range, resulting in more refined driving dynamics.
The characteristics of the all-wheel drive control are tailored to the selected drive mode and AMG DYNAMICS setting. In “Basic” and “Advanced” AMG DYNAMICS modes, the 4MATIC system operates in “Comfort” mode. In “Pro” and “Master” modes (part of the optional AMG DYNAMIC PLUS package), the 4MATIC system switches to “Sport” mode, delivering even more agile handling and pushing the limits of dynamic driving.
Chassis and Handling: Engineered for Agility
The new AMG suspension provides the foundation for exceptional directional stability and dynamic cornering capabilities with minimized body roll in the Mercedes GLA 45. Simultaneously, ride comfort is enhanced compared to the previous generation GLA 45. Longitudinal and transverse dynamics are meticulously coordinated. All suspension components have been comprehensively revised to achieve higher maximum lateral acceleration while maintaining easy vehicle control at the limits.
A McPherson strut design is employed at the front axle. The suspension setup includes a transverse control arm below the wheel center, a suspension strut, and a tie rod. The specialized axle geometry effectively reduces torque steer, enhancing both comfort and agile handling. New aluminum wishbones reduce unsprung mass, resulting in more sensitive spring response. The front axle brake calipers are radially bolted, a motorsport-derived technology that adds stability. The front axle carrier is rigidly mounted, further stiffening the front section.
The 4-link rear suspension is also rigidly connected to the body via a rear axle carrier, ensuring high torsional rigidity. Each rear wheel features three transverse control arms, a trailing arm, and specific bearings. This design guarantees maximum driving stability and agility.
The adaptive damping system AMG RIDE CONTROL offers three distinct suspension control modes, allowing drivers to choose between comfort-focused and highly sporty settings. The system operates automatically, adjusting damping forces for each wheel based on driving conditions and road surfaces. This happens within milliseconds and is infinitely variable, providing a wide spectrum of damping characteristics. The result is a balanced enhancement of both ride comfort and agility.
The robust high-performance braking system ensures consistent fade-resistant deceleration and short braking distances. On the GLA 45, 4-piston fixed front calipers work with 13.8 x 1.3 in brake discs, while 1-piston floating calipers at the rear axle engage with 13.0 x 0.9 in brake discs. The discs are internally ventilated and perforated for improved heat dissipation and to prevent brake fading, even under extreme use. The grey-painted brake calipers feature white AMG lettering.
When equipped with the optional AMG DYNAMIC PLUS package, the Mercedes GLA 45 upgrades to an even more substantial brake system, featuring 6-piston fixed calipers and 14.2 x 1.4 in brake discs at the front. In this configuration, the brake calipers are painted red and display a black AMG logo.
The electromechanical AMG speed-sensitive power steering enhances sporty driving with direct cornering response. It features a special rack with a variable transmission ratio and two characteristic curves. Depending on the selected drive program, it provides either taut and sporty or more comfort-oriented steering feedback. The rigid mounting within the integral carrier further connects the steering to the body, increasing steering precision.
The Mercedes GLA 45 offers a wide range of driving characteristics through the six AMG DYNAMIC SELECT drive programs: “Slippery”, “Comfort”, “Sport”, “Sport+”, “Individual”, and “RACE” (included in the optional AMG DYNAMIC PLUS package). These programs modify numerous parameters, including:
- Powertrain: Accelerator pedal response, shift times, and shift timing (Reduced, Moderate, Sport, or Dynamic).
- AMG DYNAMICS: Agility functions like all-wheel control, steering characteristics, and ESP® functions (Basic, Advanced, Pro, or Master).
- Suspension: Settings for Comfort, Sport, and Sport+.
- Exhaust system: Sound characteristics (Balanced or Powerful).
AMG DYNAMICS enhances agility and stability by integrating agility control with ESP®, all-wheel-drive control, and steering characteristics. For instance, during high-speed cornering, subtle braking intervention at the inner rear wheel generates a yawing motion for responsive and precise turn-in. The system offers a spectrum from highly stable to extremely dynamic, with modes ranging from “Basic” (stable handling) to “Master” (maximum agility for track driving, requiring ESP® SPORT Handling Mode or ESP® OFF). Drivers can customize AMG DYNAMICS settings in “Individual” mode or directly via the AMG steering-wheel buttons.
To ensure precise handling and stability, the AMG developers extensively reinforced the body shell of the Mercedes GLA 45. A lightweight aluminum “shearing plate” beneath the engine increases torsional rigidity at the front end. Diagonal struts at the front and rear underbody further enhance rigidity, significantly reducing longitudinal and lateral torsional movement and minimizing body roll during cornering, braking, and load changes.
Exterior and Interior: Sporty Design and High-Tech Cabin
The exterior of the Mercedes GLA 45 exudes dynamic appeal with its long hood, powerdomes, compact greenhouse, and muscular wheel arches. The AMG-specific radiator grille with vertical slats immediately identifies it as part of the AMG Performance family. Standard LED High Performance headlamps illuminate the road ahead. Flared front fenders and large air intakes with silver chrome inserts amplify its strong presence. The silver chrome front splitter optimizes airflow and aerodynamic performance.
In profile, the aerodynamically optimized 19-inch light-alloy wheels in a 10-spoke design and door panels with silver chrome or optional high-gloss black inserts are striking. Optional 21-inch light-alloy wheels are also available.
The rear view is defined by two round twin tailpipes (3.2 in diameter) and a wide rear bumper. Slim two-piece rear light clusters emphasize the vehicle’s width. The diffuser with four vertical fins and a body-colored airflow break-away edge on the roof spoiler complete the distinctive rear profile.
The high-quality interior of the Mercedes GLA 45, with its sporty appointments and MBUX infotainment system, creates a strong connection between driver and machine. Contoured sport seats with firm lateral support provide a commanding driving position. Optional AMG Performance seats are available. Standard upholstery combines black MB-Tex with DINAMICA, featuring red double topstitching and red seat belts. AMG carbon fiber-look trim adorns the dashboard. Optional upholstery in MB-Tex Neva Grey/Black with mid-grey double topstitching and light-longitudinal-grain aluminum trim is also available, along with four optional leather upholsteries.
The center console in piano black lacquer-look includes a touchpad control and additional switches for the 3-stage ESP®, manual transmission mode, and optional AMG RIDE CONTROL adaptive damping system.
The MBUX infotainment system in the Mercedes GLA 45 blends sporty design with sophisticated technology. It offers three AMG display styles for the instrument cluster: “Classic”, “Sport”, and “Supersport”, with “Supersport” featuring a central rev counter and 3D graphics. The AMG menu provides special displays like gear speed indicator, Warm-up, Set-up, G-Meter, RACETIMER, and Engine Data. The touchscreen multimedia display also reinforces the dynamic configuration with AMG-specific displays and telemetry data. The “Hey Mercedes” voice control, powered by artificial intelligence, understands natural language commands for infotainment and vehicle operation.
The optional AMG Performance steering wheel, available in Nappa leather, DINAMICA, or Nappa leather/DINAMICA, features a flattened rim, perforated grip areas, and galvanized shift paddles. Available AMG steering-wheel buttons provide direct access to AMG drive programs and other AMG functions.
AMG TRACK PACE, a virtual race engineer, is optionally available. Integrated into the MBUX system, it monitors over 80 vehicle-specific data points during track driving, displaying lap and sector times, and comparing them to a reference time. Acceleration and deceleration values can also be measured and saved. The system uses GPS and vehicle sensors to accurately detect circuit position and even circuit deviations. Data is displayed on the multimedia display, instrument cluster, and optional head-up display. Pre-loaded race tracks like the Nürburgring are included, and custom circuits can be recorded. The MBUX Augmented Reality function can even display the ideal racing line on the multimedia or head-up display, acting as a virtual driving instructor.
The AMG exhaust system of the Mercedes GLA 45 reflects its sporty and versatile character. Sound signatures range from harmonious and discreet in “Slippery”, “Comfort”, and “Sport” modes to dynamic and sporty in “Sport+” and “RACE” modes. An exhaust gas flap controls sound characteristics based on engine speed and load.
Technical Specifications: Mercedes-AMG GLA 45 at a Glance
| 2021 Mercedes-AMG GLA 45 | |
|---|---|
| Engine | Handcrafted AMG 2.0-liter Inline 4 Turbo |
| Displacement | 1991 cc |
| Max. output | 382 hp at 6,500 rpm |
| Peak torque | 354 lb-ft at 4,750-5,000 rpm |
| Drive | AMG Performance 4MATIC+ fully variable all-wheel drive with AMG TORQUE CONTROL |
| Transmission | AMG SPEEDSHIFT DCT 8-speed dual-clutch transmission |
| Acceleration 0-60 mph | 4.3 s |
| Top speed | 155 mph* |
* Electronically limited
The Mercedes GLA 45 stands as a testament to AMG’s engineering prowess, delivering a compact SUV that is both incredibly powerful and remarkably versatile. It’s a vehicle designed to thrill on the track, yet equally at home navigating daily life, appealing to a dynamic and performance-oriented audience seeking the best of both worlds.
