The Mercedes-Benz S-Class Long (V221 facelift), specifically the AMG S 65 V12 Automatic produced from 2009 to 2010, represented the pinnacle of luxury and performance within the W221 generation. Positioned as the flagship variant, it catered to buyers demanding the utmost in exclusivity, power, and refinement. The “Long” designation indicates an extended wheelbase, providing significantly more rear passenger legroom, making it particularly popular in markets where chauffeur-driven travel is common. This model was a key component of Mercedes-Benz’s strategy to maintain its dominance in the ultra-luxury sedan segment, competing directly with the Bentley Flying Spur and Rolls-Royce Phantom.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | S-Class |
| Generation | S-Class Long (V221, facelift 2009) |
| Type | AMG S 65 V12 (612 Hp) Automatic |
| Start of production | 2009 |
| End of production | 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 21.9 l/100 km (10.7 US mpg, 12.9 UK mpg, 4.6 km/l) |
| Fuel consumption (extra urban) | 10.2 l/100 km (23.1 US mpg, 27.7 UK mpg, 9.8 km/l) |
| Fuel consumption (combined) | 14.5 l/100 km (16.2 US mpg, 19.5 UK mpg, 6.9 km/l) |
| CO2 emissions | 346 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.4 sec |
| Acceleration 0 – 62 mph | 4.4 sec |
| Acceleration 0 – 60 mph | 4.2 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 3.6 kg/Hp, 278.8 Hp/tonne |
| Weight-to-torque ratio | 2.2 kg/Nm, 455.6 Nm/tonne |
| Power | 612 Hp @ 4800-5100 rpm |
| Power per litre | 102.3 Hp/l |
| Torque | 1000 Nm @ 2000-4000 rpm (737.56 lb.-ft. @ 2000-4000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 275.982 |
| Engine displacement | 5980 cm3 (364.92 cu. in.) |
| Number of cylinders | 12 |
| Engine configuration | V-engine |
| Compression ratio | 9:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | BiTurbo, Intercooler |
| Engine oil capacity | 9 l (9.51 US qt | 7.92 UK qt) |
| Coolant capacity | 9 l (9.51 US qt | 7.92 UK qt) |
| Kerb Weight | 2195 kg (4839.15 lbs.) |
| Max. weight | 2705 kg (5963.5 lbs.) |
| Max load | 510 kg (1124.36 lbs.) |
| Trunk (boot) space – minimum | 560 l (19.78 cu. ft.) |
| Fuel tank capacity | 90 l (23.78 US gal | 19.8 UK gal) |
| 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 | 12.2 m (40.03 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Drive wheel | Rear wheel drive |
| Number of gears | 5 |
| Gearbox type | Automatic transmission |
| Front brakes | Disc |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 255/35 R20; 275/35 R20 |
| Wheel rims size | 20 |
Powertrain & Engine Architecture
The heart of the AMG S 65 was the M275.982 6.0-liter V12 engine. This engine was hand-built, adhering to AMG’s “one man, one engine” philosophy. It featured twin turbochargers, intercooling, and a compression ratio of 9:1. The engine utilized multi-port fuel injection, delivering a potent 612 horsepower at 4800-5100 rpm and a staggering 1000 Nm (737 lb-ft) of torque between 2000-4000 rpm. This immense torque output was a defining characteristic of the S 65, providing effortless acceleration in any gear. The engine was paired with a five-speed automatic transmission (7G-Tronic), specifically tuned by AMG for quicker shifts and enhanced durability. While a five-speed may seem dated by modern standards, it was robust and well-matched to the engine’s power delivery.
Driving Characteristics
The AMG S 65 offered a driving experience that was both incredibly powerful and surprisingly refined. The abundant torque meant that overtaking maneuvers were executed with minimal effort. The 0-60 mph sprint took approximately 4.2 seconds, and the car was electronically limited to a top speed of 155 mph. The automatic transmission, while not as quick-shifting as some modern gearboxes, provided smooth and seamless gear changes. The long wheelbase and sophisticated suspension system (AMG-tuned ABC – Active Body Control) contributed to a comfortable and composed ride, even at high speeds. Compared to the S 550 with its V8 engine, the S 65 offered a significantly more powerful and luxurious experience, albeit with a noticeable increase in fuel consumption.
Equipment & Trim Levels
The AMG S 65 came standard with a comprehensive array of luxury features. Interior appointments included premium leather upholstery, wood trim, and brushed aluminum accents. Standard equipment included heated and ventilated front and rear seats with massage functions, a premium sound system, a rear-seat entertainment system, and a panoramic sunroof. Optional extras included a refrigerator in the rear center console, bespoke interior customization options, and advanced driver-assistance systems. The extended wheelbase provided ample rear legroom, making it a favorite among executives and dignitaries.
Chassis & Braking
The S 65 featured AMG’s Active Body Control (ABC) suspension system, which utilized hydraulic cylinders to actively control body roll and pitch. This system provided a remarkably smooth and stable ride, even during spirited driving. The car was equipped with large, ventilated disc brakes on all four wheels, coupled with an Anti-lock Braking System (ABS) and Electronic Stability Program (ESP) for enhanced safety. The tires were high-performance 255/35 R20 front and 275/35 R20 rear tires mounted on 20-inch AMG alloy wheels.
Market Reception & Comparison
The AMG S 65 was generally well-received by automotive critics, who praised its exceptional performance, luxurious interior, and advanced technology. However, its high price tag and significant fuel consumption were often cited as drawbacks. Compared to the S 550, the S 65 offered a substantial performance upgrade but came at a considerable premium. The V12 engine also required more frequent and expensive maintenance than the V8. Fuel economy was predictably poor, averaging around 16.2 US mpg in combined driving.
Legacy
The AMG S 65 V12 (W221) remains a highly sought-after vehicle among collectors and enthusiasts. The M275 V12 engine, while complex, is generally considered to be a robust and reliable powerplant when properly maintained. However, maintenance costs can be substantial due to the engine’s complexity and the need for specialized tools and expertise. Today, well-maintained examples command high prices on the used car market, reflecting their exclusivity and enduring appeal. The S 65 represents a high point in Mercedes-Benz’s commitment to building ultra-luxury, high-performance sedans.
