The Mercedes-Benz S-Class Long (V221 facelift), specifically the AMG S 63 variant produced from June 2009 to July 2010, represents the pinnacle of luxury and performance within the W221 generation. Positioned as the flagship model, the S 63 offered a significantly more potent driving experience than its naturally aspirated S-Class siblings, while maintaining the renowned comfort and technology expected of the S-Class nameplate. The “Long” designation indicates an extended wheelbase, providing increased rear passenger legroom, a feature particularly valued in markets like China and increasingly, among discerning American buyers. This model year represents a mid-cycle refresh of the V221, incorporating updated styling cues, improved technology, and refined engine management systems.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | S-Class |
| Generation | S-Class Long (V221, facelift 2009) |
| Type (Engine) | AMG S 63 V8 (525 Hp) AMG SPEEDSHIFT 7G-TRONIC |
| Start of production | June, 2009 |
| End of production | July, 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 4-5 |
| Doors | 4 |
| Fuel consumption (economy) – urban (NEDC) | 22.4 l/100 km (10.5 US mpg, 12.6 UK mpg, 4.5 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 10 l/100 km (23.5 US mpg, 28.2 UK mpg, 10 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 14.5 l/100 km (16.2 US mpg, 19.5 UK mpg, 6.9 km/l) |
| CO2 emissions (NEDC) | 347 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.6 sec |
| Acceleration 0 – 62 mph | 4.6 sec |
| Acceleration 0 – 60 mph | 4.4 sec |
| Maximum speed | 250 km/h (155.34 mph), Electronically limited |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 3.9 kg/Hp, 254.2 Hp/tonne |
| Weight-to-torque ratio | 3.3 kg/Nm, 305.1 Nm/tonne |
| Power | 525 Hp @ 6800 rpm |
| Power per litre | 84.6 Hp/l |
| Torque | 630 Nm @ 5200 rpm (464.66 lb.-ft. @ 5200 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 156.984 |
| Engine displacement | 6208 cm3 (378.84 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 102.2 mm (4.02 in.) |
| Piston Stroke | 94.6 mm (3.72 in.) |
| Compression ratio | 11.3:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 9.4 l (9.93 US qt | 8.27 UK qt) |
| Coolant | 9.35 l (9.88 US qt | 8.23 UK qt) |
| Kerb Weight | 2065 kg (4552.55 lbs.) |
| Max. weight | 2640 kg (5820.2 lbs.) |
| Max load | 575 kg (1267.66 lbs.) |
| Trunk (boot) space – minimum | 560 l (19.78 cu. ft.) |
| Fuel tank capacity | 90 l (23.78 US gal | 19.8 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Length | 5226 mm (205.75 in.) |
| Width | 1871 mm (73.66 in.) |
| Width including mirrors | 2120 mm (83.46 in.) |
| Height | 1479 mm (58.23 in.) |
| Wheelbase | 3165 mm (124.61 in.) |
| Front track | 1600 mm (62.99 in.) |
| Rear (Back) track | 1606 mm (63.23 in.) |
| Front overhang | 888 mm (34.96 in.) |
| Rear overhang | 1173 mm (46.18 in.) |
| Minimum turning circle (turning diameter) | 12.22 m (40.09 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 7 gears, automatic transmission G-TRONIC |
| Front suspension | Hydraulic elements, Double wishbone, Transverse stabilizer |
| Rear suspension | Hydraulic elements, Independent multi-link suspension, Transverse stabilizer |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | Front wheel tires: 255/40 R19 Rear wheel tires: 275/40 R19 |
| Wheel rims size | Front wheel rims: 8.5J x 19 Rear wheel rims: 9.5J x 19 |
Powertrain & Engine Architecture
The heart of the AMG S 63 is the M 156.984 6.2-liter naturally aspirated V8 engine. This engine, hand-built at Mercedes-AMG’s Affalterbach facility, was a hallmark of AMG’s engineering prowess. It featured a short-stroke design, silicon-aluminum alloy engine block, and a four-valve-per-cylinder DOHC valvetrain. Fuel delivery was handled by a multi-port fuel injection system, optimized for both power and efficiency. The engine produced 525 horsepower at 6800 rpm and a substantial 630 Nm (464.66 lb-ft) of torque at 5200 rpm. This power was channeled through the AMG SPEEDSHIFT 7G-TRONIC seven-speed automatic transmission, a sophisticated unit offering both fully automatic operation and manual gear selection via steering wheel-mounted paddles. The transmission was specifically tuned for quicker shift times and a more responsive driving experience compared to the standard S-Class automatic.
Driving Characteristics
The AMG S 63 delivered a markedly different driving experience than other S-Class variants. While maintaining the S-Class’s renowned ride comfort, the AMG model offered significantly enhanced acceleration and handling. The 0-60 mph sprint was dispatched in approximately 4.4 seconds, and the electronically limited top speed of 155 mph provided ample performance for highway cruising and spirited driving. The 7G-TRONIC transmission, with its closely spaced gear ratios, kept the engine in its optimal power band, providing strong acceleration in any gear. Compared to the 1.8L or 3.5L S-Class models, the S 63 offered a visceral and engaging driving experience, prioritizing performance over fuel economy. The increased weight of the engine did slightly impact handling agility compared to lighter S-Class models, but the AMG-tuned suspension and powerful brakes compensated effectively.
Equipment & Trim Levels
The AMG S 63 came standard with a comprehensive array of luxury and performance features. Interior appointments included premium leather upholstery, AMG sport seats, carbon fiber trim, and a sport steering wheel. Standard technology included Mercedes’ COMAND infotainment system, a premium sound system, and a host of driver-assistance features such as adaptive cruise control, lane-keeping assist, and parking guidance. Optional extras included a rear-seat entertainment system, massaging seats, and a panoramic sunroof. The long wheelbase version provided significantly more rear legroom, making it a popular choice for chauffeur-driven executives.
Chassis & Braking
The S 63 featured a modified chassis and suspension system compared to standard S-Class models. AMG-tuned springs, dampers, and stabilizer bars lowered the ride height and improved handling. The braking system consisted of ventilated discs at all four corners, with larger rotors and multi-piston calipers for enhanced stopping power. ABS (Anti-lock Braking System) was standard, providing increased stability during hard braking. The steering system utilized a hydraulic power steering rack and pinion, offering precise and responsive steering feel.
Market Reception & Comparison
The AMG S 63 was widely praised by automotive critics for its exceptional performance, luxurious interior, and advanced technology. It was often compared favorably to rivals such as the BMW 760Li and the Porsche Panamera. While fuel economy was a concern, the S 63’s overall performance and refinement were considered to justify its higher price tag. Compared to the more fuel-efficient S 350 or S 550 models, the S 63 appealed to a different clientele – those prioritizing performance and exclusivity over fuel savings. Reliability was generally good, although the complexity of the engine and transmission required diligent maintenance.
Legacy
The V221 AMG S 63 remains a highly sought-after vehicle in the used car market. The M 156 engine is regarded as one of AMG’s finest creations, known for its robust construction and exhilarating performance. While maintenance costs can be higher than those of more mainstream luxury sedans, the S 63’s enduring appeal and strong resale values make it a worthwhile investment for enthusiasts. The combination of luxury, performance, and technology continues to make the V221 S 63 a compelling choice for those seeking a high-performance luxury sedan.
