The Mercedes-Benz S 500 BlueEFFICIENCY 4MATIC, part of the V221 S-Class Long facelift introduced in 2009, represented a significant blend of luxury, performance, and efficiency for the German automaker. Produced from 2011 to 2013, this variant occupied a prominent position within the S-Class range, offering a compelling alternative to the standard S 500 and the performance-oriented AMG models. The “Long” designation indicates an extended wheelbase, prioritizing rear passenger comfort, a key feature for its target market. This model was primarily sold in markets where large, luxurious sedans with chauffeur-driven potential were highly valued, including Europe, Asia, and the United States.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | S-class |
| Generation | S-class Long (V221, facelift 2009) |
| Type (Engine) | S 500 BlueEFFICIENCY (435 Hp) 4MATIC G-TRONIC |
| Start of production | 2011 year |
| End of production | 2013 year |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban | 13.9 l/100 km (16.9 US mpg, 20.3 UK mpg, 7.2 km/l) |
| Fuel consumption (economy) – extra urban | 7.6-7.7 l/100 km (30.9 – 30.5 US mpg, 37.2 – 36.7 UK mpg, 13.2 – 13 km/l) |
| Fuel consumption (economy) – combined | 9.9 l/100 km (23.8 US mpg, 28.5 UK mpg, 10.1 km/l) |
| CO2 emissions | 230-231 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5 sec |
| Acceleration 0 – 62 mph | 5 sec |
| Acceleration 0 – 60 mph | 4.8 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 4.7 kg/Hp, 210.7 Hp/tonne |
| Weight-to-torque ratio | 3 kg/Nm, 339 Nm/tonne |
| Power | 435 Hp @ 5250 rpm |
| Torque | 700 Nm @ 1800-3500 rpm (516.29 lb.-ft. @ 1800-3500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 278.932 |
| Engine displacement | 4663 cm3 (284.55 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Compression ratio | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-Turbo, Intercooler |
| Engine oil capacity | 8.5 l (8.98 US qt | 7.48 UK qt) |
| Coolant | 13.7 l (14.48 US qt | 12.05 UK qt) |
| Kerb Weight | 2065 kg (4552.55 lbs.) |
| Max. weight | 2715 kg (5985.55 lbs.) |
| Max load | 650 kg (1433 lbs.) |
| Trunk (boot) space – minimum | 560 l (19.78 cu. ft.) |
| Fuel tank capacity | 83 l (21.93 US gal | 18.26 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.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 7 gears, 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 S 500 BlueEFFICIENCY was powered by the M278.932 4.6-liter V8 engine. This engine was a cornerstone of Mercedes-Benz’s efforts to balance performance with fuel economy. It featured direct fuel injection, a twin-turbocharger setup with intercooling, and variable valve timing on both intake and exhaust sides. The direct injection system allowed for precise fuel delivery, optimizing combustion efficiency and reducing emissions. The twin-turbochargers provided significant boost, contributing to the engine’s 435 horsepower and 516 lb-ft of torque. The engine’s architecture was designed for smoothness and refinement, characteristics expected of a flagship luxury sedan. Paired with the engine was the 7G-TRONIC automatic transmission, a seven-speed unit known for its smooth shifts and efficiency. The 4MATIC all-wheel-drive system distributed power to all four wheels, enhancing traction and stability, particularly in adverse weather conditions.
Driving Characteristics
The S 500 BlueEFFICIENCY offered a driving experience that prioritized comfort and effortless power delivery. The 435 hp and 516 lb-ft of torque provided brisk acceleration – 0 to 60 mph in around 4.8 seconds – but the emphasis was on smooth, refined performance rather than outright sportiness. The 7G-TRONIC transmission contributed to this character, offering seamless gear changes and a wide range of ratios to keep the engine in its optimal power band. Compared to the higher-performance S 63 AMG, the S 500 felt less aggressive and more composed. Against the S 350 BlueTEC diesel, the S 500 offered significantly more power and a more responsive feel, but at the cost of fuel economy. The long wheelbase and sophisticated suspension system ensured a comfortable ride, even on imperfect road surfaces.
Equipment & Trim Levels
The S 500 BlueEFFICIENCY came standard with a comprehensive array of luxury features. These included leather upholstery, heated and ventilated front seats with massage functions, a premium sound system, a navigation system, and a panoramic sunroof. The interior was meticulously crafted with high-quality materials and attention to detail. Optional extras included rear seat entertainment systems, upgraded leather packages, and various driver-assistance technologies such as adaptive cruise control, lane-keeping assist, and a night vision system. The “Long” variant specifically offered extended rear legroom, making it ideal for passengers who valued space and comfort.
Chassis & Braking
The V221 S-Class featured an advanced chassis design with an independent suspension system at all four corners. The front suspension utilized a multi-link setup, while the rear employed a sophisticated air suspension system with adaptive damping. This air suspension allowed the car to automatically adjust its ride height and damping characteristics based on road conditions and driving style. The braking system consisted of ventilated disc brakes on all four wheels, coupled with ABS, Electronic Stability Program (ESP), and Brake Assist. The 4MATIC all-wheel-drive system further enhanced braking performance by distributing braking force to all four wheels, improving stability and reducing stopping distances.
Market Reception & Comparison
The S 500 BlueEFFICIENCY was generally well-received by automotive critics. It was praised for its luxurious interior, comfortable ride, and refined performance. The fuel economy, while not exceptional for a V8 engine, was considered respectable for its class. Compared to the S 350 BlueTEC, the S 500 offered a more engaging driving experience, but with a higher price tag and lower fuel efficiency. Against the S 63 AMG, it provided a more balanced blend of luxury and performance, appealing to buyers who didn’t require the ultimate in speed and handling.
Legacy
The M278 engine family, including the one used in the S 500 BlueEFFICIENCY, has proven to be relatively reliable, although maintenance costs can be substantial due to the complexity of the engine and its associated systems. The 7G-TRONIC transmission is also generally considered durable, but requires regular fluid changes. In the used car market, the V221 S-Class, including the S 500 BlueEFFICIENCY, remains a desirable option for buyers seeking a luxurious and well-equipped sedan. However, potential buyers should be aware of the potential for expensive repairs and the importance of maintaining the car according to Mercedes-Benz’s recommended service schedule. The S 500 BlueEFFICIENCY represents a high point in Mercedes-Benz’s engineering and design, offering a compelling combination of luxury, performance, and technology.
