The Mercedes-Benz SL (R231) AMG SL 63, produced from 2014 to 2015, represents the high-performance pinnacle of the R231 SL generation. This roadster, boasting a powerful 5.5-liter twin-turbocharged V8 engine, was positioned as the premium offering within the SL lineup, significantly exceeding the capabilities of the SL 350 and SL 550 models. The R231 SL, launched in 2012, aimed to blend grand touring comfort with sporty handling, and the AMG SL 63 amplified the latter aspect considerably. It was built on the Mercedes-Benz M157 engine platform, a hallmark of AMG performance during that era.
AMG SL 63: Powertrain & Engine Architecture
At the heart of the AMG SL 63 lies the M157.983 engine, a 5.5-liter (5461 cm3 or 333.25 cu. in.) V8 engine. This engine is characterized by its direct fuel injection system and twin turbochargers with intercooling. The engine produces 585 horsepower (Hp) at 5500 rpm and a substantial 900 Newton-meters (663.81 lb.-ft.) of torque available from 2250-3750 rpm. The compression ratio is 10:1. The engine is longitudinally mounted at the front of the vehicle.
Power is transmitted to the rear wheels via a 7-speed AMG SPEEDSHIFT MCT (Multi Clutch Technology) automatic transmission. This transmission isn’t a traditional torque-converter automatic; instead, it utilizes a wet multi-plate clutch pack in place of the torque converter, offering faster shift times and a more direct connection to the engine. The MCT transmission features selectable drive modes, including Comfort, Sport, Sport Plus, and Manual, allowing the driver to tailor the shift points and responsiveness to their preferences. The transmission is designed for both spirited driving and comfortable cruising.
Engine Oil Specifications
The engine requires 8.5 liters (8.98 US qt | 7.48 UK qt) of engine oil meeting specific Mercedes-Benz specifications. Detailed oil specifications are available through authorized Mercedes-Benz service channels.
Driving Characteristics
The AMG SL 63 delivers exhilarating performance. Its 0-100 km/h (0-62 mph) acceleration time is a rapid 4.2 seconds, and it can reach 0-60 mph in approximately 4 seconds. The top speed is electronically limited to 250 km/h (155.34 mph). The MCT transmission contributes significantly to the driving experience, providing quick and precise gear changes. The power delivery is remarkably smooth and linear, thanks to the twin-turbochargers, minimizing turbo lag. While the SL 63 is a large vehicle, the AMG-tuned suspension and responsive steering contribute to surprisingly agile handling for its size and weight. Compared to the SL 550, the SL 63 offers a significantly more aggressive and engaging driving experience, prioritizing performance over outright comfort. The SL 350, being the entry-level model, offered a much more economical and relaxed driving experience, lacking the raw power and dynamic capabilities of the SL 63.
Equipment & Trim Levels
The AMG SL 63 came standard with a comprehensive array of luxury and performance features. Interior appointments included premium leather upholstery, AMG sport seats, and aluminum trim. Standard equipment also included the AIRSCARF system (neck-level heating), a premium sound system, and a multi-function steering wheel. The infotainment system featured a large display screen and navigation. Optional extras included carbon fiber trim, upgraded leather packages, and advanced driver-assistance systems such as Distronic Plus (adaptive cruise control) and Lane Keeping Assist. The exterior styling was enhanced with AMG-specific body styling, including unique front and rear bumpers, side skirts, and a rear spoiler. The vehicle also featured 19-inch AMG alloy wheels.
Chassis & Braking
The AMG SL 63 utilizes an independent multi-link suspension system at both the front and rear, optimized for performance handling. The suspension is tuned to provide a balance between comfort and control. The braking system consists of ventilated discs at all four corners, providing ample stopping power. Anti-lock braking system (ABS) is standard. The steering system is a rack and pinion type with electric power steering. The vehicle is equipped with tires sized 255/35 ZR 19 at the front and 285/30 ZR 19 at the rear, providing excellent grip. The curb weight of the vehicle is 1845 kg (4067.53 lbs), and the maximum weight is 2180 kg (4806.08 lbs).
Market Reception & Comparison
The AMG SL 63 was generally well-received by automotive critics, who praised its powerful engine, responsive handling, and luxurious interior. However, some critics noted the vehicle’s considerable weight and its impact on agility. Fuel economy, while respectable for a vehicle of this performance caliber, was not a strong point, with combined fuel consumption of 9.9 l/100 km (23.8 US mpg, 28.5 UK mpg). Compared to the SL 550, the SL 63 offered a significantly more engaging driving experience but at the cost of increased fuel consumption and a firmer ride. The SL 350, while more economical, lacked the performance and prestige of the AMG model. The SL 63 competed with other high-performance roadsters such as the Porsche 911 and the BMW SL.
Technical Specifications
| Body type | Roadster, 2 Doors, 2 Seats |
| Fuel economy (combined) | 9.9 l/100 km (23.8 US mpg, 28.5 UK mpg, 10.1 km/l) |
| CO2 emissions | 231 g/km |
| Emission standard | Euro 6 |
| Maximum speed | 250 km/h (155.34 mph) |
| Acceleration 0-100 km/h | 4.2 sec |
| Acceleration 0-60 mph | 4 sec |
| Power | 585 Hp @ 5500 rpm |
| Torque | 900 Nm @ 2250-3750 rpm (663.81 lb.-ft. @ 2250-3750 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 157.983 |
| Engine displacement | 5461 cm3 (333.25 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Compression ratio | 10:1 |
| Fuel injection system | Direct injection |
| Engine oil capacity | 8.5 l (8.98 US qt | 7.48 UK qt) |
| Kerb Weight | 1845 kg (4067.53 lbs.) |
| Max. weight | 2180 kg (4806.08 lbs.) |
| Max load | 335 kg (738.55 lbs.) |
| Trunk (boot) space – minimum | 241 l (8.51 cu. ft.) |
| Trunk (boot) space – maximum | 381 l (13.45 cu. ft.) |
| Fuel tank capacity | 75 l (19.81 US gal | 16.5 UK gal) |
| Length | 4617 mm (181.77 in.) |
| Width | 1877 mm (73.9 in.) |
| Height | 1315 mm (51.77 in.) |
| Wheelbase | 2585 mm (101.77 in.) |
| Gearbox | 7 gears, automatic transmission MCT |
Legacy
The M157 engine, found in the AMG SL 63, has proven to be a relatively reliable powerplant when properly maintained. Common issues include potential oil leaks and occasional problems with the cooling system. The MCT transmission, while offering performance benefits, can be more expensive to repair than a traditional automatic transmission. Today, the R231 AMG SL 63 remains a desirable grand tourer in the used car market, appealing to enthusiasts seeking a blend of luxury, performance, and exclusivity. Its powerful engine and sophisticated technology continue to provide an engaging driving experience, making it a compelling option for those looking for a high-performance roadster.
