The Mercedes-Benz CLS 53 AMG, produced from 2021 to 2023 as part of the C257 facelift generation, represents a performance-oriented iteration of the CLS four-door coupe. Positioned as a mid-range performance model within the CLS lineup – sitting between the base CLS 450 and the more potent CLS 63 AMG – the CLS 53 aimed to deliver a blend of luxury, technology, and engaging driving dynamics. It distinguished itself through its mild-hybrid powertrain, offering a unique balance of power and efficiency. This variant was primarily marketed towards buyers seeking a sophisticated grand tourer with a sporting edge, appealing to those who desired AMG performance without the full commitment of the top-tier 63 model.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | CLS |
| Generation | CLS coupe (C257, facelift 2021) |
| Type | AMG CLS 53 (435 Hp) 9G AMG SPEEDSHIFT TCT 4MATIC+ |
| Start of production | 2021 |
| End of production | 2023 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Coupe |
| Seats | 5 |
| Doors | 4 |
| Combined fuel consumption (WLTP) | 9.2-9.6 l/100 km (25.6 – 24.5 US mpg) |
| CO2 emissions (WLTP) | 209-219 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.5 sec |
| Acceleration 0 – 62 mph | 4.5 sec |
| Acceleration 0 – 60 mph | 4.3 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.) |
| Power | 435 Hp @ 5500-6100 rpm |
| Torque | 520 Nm @ 1800-5800 rpm (383.53 lb.-ft. @ 1800-5800 rpm) |
| Engine displacement | 2999 cm3 (183.01 cu. in.) |
| Number of cylinders | 6 |
| Engine layout | Front, Longitudinal |
| Kerb Weight | 1910 kg (4210.83 lbs.) |
| Max. weight | 2550 kg (5621.79 lbs.) |
| Trunk (boot) space – minimum | 490 l (17.3 cu. ft.) |
| Fuel tank capacity | 66 l (17.44 US gal) |
| Number of gears | 9 |
| Gearbox type | Automatic transmission G AMG SPEEDSHIFT TCT |
Powertrain & Engine Architecture
The heart of the CLS 53 AMG is the M 256.930 3.0-liter inline-six cylinder engine. This engine is notable for its innovative combination of a turbocharger and an electric auxiliary compressor. The electric compressor, powered by a 48-volt mild-hybrid system, spools up instantly to provide boost at low engine speeds, effectively eliminating turbo lag and improving throttle response. This system contributes 22 horsepower and 250 Nm (184 lb-ft) of torque. The engine utilizes direct fuel injection and a double overhead camshaft (DOHC) valvetrain. The 9G-TRONIC nine-speed automatic transmission, specifically tuned by AMG SPEEDSHIFT TCT, provides quick and precise gear changes. This transmission features a wet multi-disc clutch pack in place of a traditional torque converter, further enhancing shift speed and responsiveness. The 4MATIC+ all-wheel-drive system intelligently distributes torque between the front and rear axles for optimal traction and handling.
Driving Characteristics
The CLS 53 AMG delivers a refined yet assertive driving experience. The mild-hybrid system and electric compressor contribute to a remarkably linear power delivery, with minimal delay from the turbocharger. Acceleration from 0 to 60 mph is achieved in approximately 4.3 seconds, and the car feels confident and stable at high speeds. The 9G-TRONIC transmission offers smooth and quick shifts, whether in automatic mode or controlled manually via the steering wheel-mounted paddle shifters. Compared to the CLS 450, the 53 AMG offers a significantly more engaging driving experience, with sharper throttle response and increased power. While not as brutally fast as the CLS 63, the 53 strikes a compelling balance between performance and everyday usability. The air suspension provides a comfortable ride quality, while also allowing for adjustable damping settings to prioritize sportiness when desired.
Equipment & Trim Levels
The CLS 53 AMG came standard with a comprehensive array of luxury and technology features. Interior appointments typically included premium leather upholstery, AMG sport seats, and brushed aluminum trim. Standard technology included the Mercedes-Benz User Experience (MBUX) infotainment system with a large touchscreen display, a digital instrument cluster, and a premium sound system. Optional extras included features such as a head-up display, advanced driver-assistance systems (like adaptive cruise control and lane-keeping assist), and a panoramic sunroof. Exterior styling cues included AMG-specific body styling, larger wheels, and quad exhaust outlets.
Chassis & Braking
The CLS 53 AMG features an independent multi-link suspension at both the front and rear, enhanced with air suspension for adjustable ride height and damping. This system allows the driver to tailor the suspension settings to their preferences, ranging from a comfortable ride to a more sporty and controlled feel. Braking duties are handled by ventilated discs at all four corners, with larger rotors and upgraded calipers compared to the base CLS models. The braking system is complemented by ABS (Anti-lock Braking System) and other electronic stability control systems.
Market Reception & Comparison
The CLS 53 AMG was generally well-received by automotive critics. Reviewers praised its smooth and powerful engine, responsive transmission, and comfortable ride quality. The mild-hybrid system was lauded for its ability to eliminate turbo lag and improve fuel efficiency. Compared to the CLS 450, the 53 AMG offered a noticeable performance upgrade, while remaining more approachable and less aggressive than the CLS 63. Fuel economy figures, while not exceptional for a performance vehicle, were respectable, ranging from approximately 24.5 to 25.6 US mpg combined. Reliability reports have been generally positive, with few widespread issues reported.
Legacy
The CLS 53 AMG represents an interesting chapter in Mercedes-Benz’s performance lineup. Its innovative mild-hybrid powertrain foreshadowed the broader adoption of electrified technology in AMG models. On the used car market, the CLS 53 AMG holds its value relatively well, appealing to buyers seeking a stylish and capable grand tourer with a unique powertrain. The M256 engine, while complex, has proven to be reasonably reliable when properly maintained. As a blend of luxury, performance, and technology, the CLS 53 AMG continues to be a desirable option for enthusiasts seeking a sophisticated and engaging driving experience.
