The Mercedes-Benz SL (R231) underwent a significant facelift in 2016, continuing the model’s legacy as a luxury roadster. Production of the facelifted model spanned from 2016 to 2019, with the AMG SL 63 V8 (571 Hp) SPEEDSHIFT MCT variant representing the performance pinnacle of the range. This model year saw refinements to styling, technology, and engine tuning, solidifying the R231’s position as a desirable grand tourer. The SL 63, equipped with the SPEEDSHIFT MCT transmission, was positioned as the premium offering, catering to drivers seeking exhilarating performance combined with Mercedes-Benz’s renowned luxury and refinement.
AMG SL 63 V8 (571 Hp) SPEEDSHIFT MCT: An Overview
The AMG SL 63, introduced during the R231 facelift, was designed to deliver a thrilling driving experience. It distinguished itself from other SL variants, such as the SL 400 and SL 550, through its substantially more powerful engine, upgraded performance components, and more aggressive styling cues. The “MCT” designation in the transmission name refers to the Multi Clutch Technology, a wet-clutch system derived from Mercedes-AMG’s experience in motorsport. This transmission was chosen for its faster shift times and enhanced responsiveness compared to a traditional torque-converter automatic.
Powertrain & Engine Architecture
At the heart of the AMG SL 63 lies the M157.983 5.5-liter V8 engine. This engine is a twin-turbocharged masterpiece, producing 571 horsepower at 5500 rpm and a massive 900 Nm (663.81 lb-ft) of torque available from just 2250 rpm. The engine utilizes direct fuel injection, ensuring precise fuel delivery and optimal combustion. The valvetrain is a double overhead camshaft (DOHC) design with four valves per cylinder, maximizing airflow and contributing to the engine’s high output. The engine is longitudinally mounted at the front of the vehicle, driving the rear wheels.
The SPEEDSHIFT MCT 7-speed automatic transmission is a key component of the SL 63’s performance. Unlike conventional automatics, the MCT utilizes a wet multi-disc clutch pack instead of a torque converter to connect the engine to the transmission. This design allows for incredibly quick and precise gear changes, enhancing both acceleration and driver engagement. The transmission features multiple driving modes, including Comfort, Sport, Sport Plus, and Manual, allowing the driver to tailor the shift points and responsiveness to their preferences. Paddle shifters mounted on the steering wheel provide manual control over gear selection.
Driving Characteristics
The AMG SL 63 delivers a driving experience that is both exhilarating and refined. The combination of the powerful V8 engine and the responsive MCT transmission results in blistering acceleration. Officially, 0 to 62 mph (0-100 km/h) takes just 4.1 seconds, with some independent tests recording 0-60 mph times as low as 3.9 seconds. The electronically limited top speed of 250 km/h (155.34 mph) prevents the car from reaching its full potential, but even at lower speeds, the SL 63 feels incredibly capable.
The transmission’s gear ratios are optimized for both acceleration and high-speed cruising. Lower gears provide strong off-the-line acceleration, while higher gears allow for relaxed and efficient highway driving. The suspension, featuring independent multi-link setups at both the front and rear, provides a comfortable ride while maintaining excellent handling characteristics. The car feels planted and stable even when pushed hard through corners, thanks to its sophisticated suspension tuning and wide tires (255/35 R19 front, 285/30 R19 rear).
Equipment & Trim Levels
The AMG SL 63 came standard with a comprehensive list of features, reflecting its position as the flagship model. Standard equipment included leather upholstery, heated and ventilated seats, a premium sound system, a navigation system, and a host of advanced safety features. The interior featured AMG-specific styling cues, such as a flat-bottom steering wheel and carbon fiber trim.
Optional extras included features such as the Distronic Plus adaptive cruise control, lane keeping assist, and a panoramic sunroof. Buyers could also customize their SL 63 with a wide range of exterior paint colors, interior trim options, and wheel designs. The overall interior ambiance was one of luxury and sophistication, with a focus on high-quality materials and meticulous craftsmanship.
Chassis & Braking
The R231 SL 63 utilized a robust chassis designed to handle the engine’s substantial power. The car’s construction incorporated a significant amount of aluminum, helping to reduce weight and improve rigidity. The suspension system, as mentioned previously, featured independent multi-link setups at both the front and rear, providing a comfortable ride and precise handling.
Braking performance was equally impressive, with ventilated discs at all four corners. The braking system was equipped with ABS (Anti-lock Braking System) and other advanced safety features, ensuring confident stopping power in all conditions. The steering system was a rack and pinion design with electric power steering, providing precise and responsive steering feel.
Market Reception & Comparison
The AMG SL 63 was generally well-received by automotive critics, who praised its powerful engine, responsive transmission, and luxurious interior. However, some critics noted that the car’s weight could detract from its agility, and its fuel economy was relatively poor (combined fuel consumption of 12.1 l/100 km or 19.4 US mpg). Compared to the SL 400 and SL 550, the SL 63 offered a significantly more engaging driving experience, but at a higher price point.
In terms of reliability, the M157 engine has proven to be generally robust, although some owners have reported issues with the valve cover gaskets and the fuel pump. The MCT transmission, while offering superior performance, can be more complex and potentially more expensive to maintain than a traditional automatic transmission.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | SL |
| Generation | SL (R231, facelift 2016) |
| Type | AMG SL 63 V8 (571 Hp) SPEEDSHIFT MCT |
| Start of production | July, 2018 |
| End of production | May, 2019 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Roadster |
| Seats | 2 |
| Doors | 2 |
| Combined fuel consumption (WLTP) | 12.1 l/100 km (19.4 US mpg) |
| CO2 emissions (WLTP) | 274 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.1 sec |
| Acceleration 0 – 62 mph | 4.1 sec |
| Acceleration 0 – 60 mph | 3.9 sec (Calculated) |
| Maximum speed | 250 km/h (155.34 mph) |
| Engine Model/Code | M 157.983 |
| Engine displacement | 5461 cm3 (333.25 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Power | 571 Hp @ 5500 rpm |
| Torque | 900 Nm @ 2250 rpm (663.81 lb.-ft. @ 2250 rpm) |
| Kerb Weight | 1770 kg (3902.18 lbs.) |
| Max. weight | 2180 kg (4806.08 lbs.) |
| Trunk (boot) space – maximum | 504 l (17.8 cu. ft.) |
| Fuel tank capacity | 75 l (19.81 US gal) |
| Length | 4633 mm (182.4 in.) |
| Width | 1877 mm (73.9 in.) |
| Height | 1300 mm (51.18 in.) |
Legacy
The AMG SL 63 (R231) remains a highly sought-after vehicle in the used car market. Its combination of performance, luxury, and exclusivity continues to appeal to enthusiasts. While maintenance costs can be higher than those of less powerful SL variants, the SL 63’s robust engine and well-engineered chassis ensure that it remains a capable and enjoyable grand tourer for years to come. The SPEEDSHIFT MCT transmission, while complex, offers a unique driving experience that sets it apart from other luxury roadsters. The R231 SL 63 represents a high point in the SL lineage, blending Mercedes-Benz’s heritage with AMG’s performance expertise.
