The Mercedes-Benz S-Class Long (V221 facelift), specifically the S 500 V8 with the 7G-TRONIC automatic transmission, represented the pinnacle of luxury and technology for the German automaker between 2009 and 2011. This extended-wheelbase variant of the V221 generation S-Class was primarily aimed at markets where rear-seat passenger comfort was highly valued, offering significantly more legroom than the standard wheelbase model. The S 500, positioned as a mid-to-high range offering within the S-Class lineup, bridged the gap between the entry-level S 350 and the flagship S 600 models, providing a compelling blend of performance, refinement, and features. It was a key model in maintaining Mercedes-Benz’s reputation for engineering excellence and opulent interiors.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | S-class |
| Generation | S-class Long (V221, facelift 2009) |
| Type (Engine) | S 500 V8 (388 Hp) G-TRONIC |
| Start of production | 2009 |
| End of production | 2011 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 16.6-16.8 l/100 km (14.2 – 14 US mpg, 17 – 16.8 UK mpg, 6 – 6 km/l) |
| Fuel consumption (extra urban) | 8.0-8.2 l/100 km (29.4 – 28.7 US mpg, 35.3 – 34.4 UK mpg, 12.5 – 12.2 km/l) |
| Fuel consumption (combined) | 11.1-11.3 l/100 km (21.2 – 20.8 US mpg, 25.4 – 25 UK mpg, 9 – 8.8 km/l) |
| CO2 emissions | 260-264 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.4 sec |
| Acceleration 0 – 62 mph | 5.4 sec |
| Acceleration 0 – 60 mph | 5.1 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Weight-to-power ratio | 5 kg/Hp, 200 Hp/tonne |
| Weight-to-torque ratio | 3.7 kg/Nm, 273.2 Nm/tonne |
| Power | 388 Hp @ 6000 rpm |
| Power per litre | 71 Hp/l |
| Torque | 530 Nm @ 2800-4800 rpm (390.91 lb.-ft. @ 2800-4800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 273.961 |
| Engine displacement | 5461 cm3 (333.25 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Compression ratio | 10.7:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 8.5 l (8.98 US qt | 7.48 UK qt) |
| Coolant capacity | 8.5 l (8.98 US qt | 7.48 UK qt) |
| Kerb Weight | 1940 kg (4276.97 lbs.) |
| Max. weight | 2595 kg (5721 lbs.) |
| Max load | 655 kg (1444.03 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 | 7 |
| Gearbox type | Automatic transmission G-TRONIC |
| Front brakes | Disc |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 255/45 R18 |
| Wheel rims size | 18 |
Powertrain & Engine Architecture
The heart of the S 500 was the M273.961 5.5-liter naturally aspirated V8 engine. This engine was a significant evolution of Mercedes-Benz’s V8 architecture, featuring all-aluminum construction, three valves per cylinder, and a sophisticated multi-port fuel injection system. The M273 engine was known for its smooth power delivery and relatively high specific output. The 7G-TRONIC automatic transmission, a seven-speed unit, was a key component in maximizing both performance and fuel efficiency. This transmission offered smooth, almost imperceptible shifts and allowed the engine to operate in its optimal power band more frequently. The transmission featured a torque converter lock-up clutch to reduce slippage and improve efficiency. The engine produced 388 horsepower at 6000 rpm and 530 Nm (390.91 lb-ft) of torque between 2800 and 4800 rpm.
Driving Characteristics
The S 500 V8 Automatic offered a driving experience focused on effortless cruising and refined performance. While not as overtly sporty as some of its competitors, the S 500 delivered brisk acceleration – 0 to 60 mph in approximately 5.1 seconds – and ample power for overtaking maneuvers. The 7G-TRONIC transmission contributed to a relaxed driving experience, with smooth gear changes and a willingness to downshift when needed. Compared to the S 350, the S 500 offered a noticeable increase in power and responsiveness. However, it lacked the raw acceleration of the higher-performance S 600 models. The long wheelbase provided a supremely comfortable ride, absorbing bumps and imperfections in the road with ease. The steering was precise and well-weighted, though it lacked the direct feel of some sportier sedans.
Equipment & Trim Levels
The S 500 Long came standard with a comprehensive array of luxury features. Leather upholstery was standard, along with wood trim, power-adjustable heated and ventilated front seats with memory function, a premium sound system, and a multi-function steering wheel. The extended wheelbase provided significantly more rear legroom, often paired with individual rear seats with massage functions. Optional extras included a rear entertainment system, a panoramic sunroof, advanced parking assist features, and various driver-assistance systems like Distronic Plus adaptive cruise control. The interior design emphasized elegance and sophistication, with high-quality materials and meticulous attention to detail.
Chassis & Braking
The V221 S-Class featured an advanced chassis design with an independent suspension on all four wheels. The front suspension utilized a multi-link setup, while the rear employed a modified multi-link design optimized for ride comfort. The S 500 was equipped with disc brakes on all four wheels, coupled with ABS (Anti-lock Braking System), Electronic Stability Program (ESP), and Brake Assist. The suspension was tuned to prioritize ride comfort, but also provided good handling stability. Air suspension was often included, allowing the driver to adjust the ride height and stiffness. The long wheelbase contributed to the car’s inherent stability.
Market Reception & Comparison
The S 500 V8 Automatic was generally well-received by automotive critics. It was praised for its luxurious interior, comfortable ride, and refined performance. However, some critics noted that the fuel economy was relatively poor, especially considering the engine’s displacement. Compared to the S 350, the S 500 offered a significant performance upgrade, but at a higher price point. The S 600, with its V12 engine, provided even more power and prestige, but came with a substantially higher cost and increased running expenses. The S 500 struck a balance between luxury, performance, and practicality, making it a popular choice among discerning buyers.
Legacy
The M273 engine, while not without its maintenance requirements (particularly regarding valve cover gaskets and oil leaks), proved to be a relatively durable and reliable powerplant when properly maintained. The 7G-TRONIC transmission also demonstrated good long-term reliability. Today, the V221 S-Class, including the S 500 variant, represents a compelling value in the used luxury car market. These cars offer a significant amount of luxury and technology for their price, but potential buyers should be aware of the potential maintenance costs associated with a high-mileage luxury vehicle. The S 500 remains a testament to Mercedes-Benz’s commitment to engineering excellence and luxurious appointments.
