The Mercedes-Benz S 600 V12 (517 hp) Long, part of the V221 generation S-Class produced between November 2005 and April 2009, represented the pinnacle of luxury and performance within the already prestigious S-Class lineup. Positioned as the flagship variant, it catered to buyers demanding the utmost in refinement, power, and exclusivity. The “Long” designation indicates an extended wheelbase, providing significantly increased rear passenger legroom, a feature particularly popular in markets like China and among chauffeur-driven executives. This model was a key component of Mercedes-Benz’s strategy to maintain its dominance in the full-size luxury sedan segment, competing directly with the BMW 7 Series and Audi A8.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | S-class |
| Generation | S-class Long (V221) |
| Type (Engine) | S 600 V12 (517 Hp) 5G-TRONIC |
| Start of production | November, 2005 |
| End of production | April, 2009 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban (NEDC) | 21.7 l/100 km (10.8 US mpg, 13 UK mpg, 4.6 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) | 14.3 l/100 km (16.4 US mpg, 19.8 UK mpg, 7 km/l) |
| CO2 emissions (NEDC) | 340 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 | 4.1 kg/Hp, 242.2 Hp/tonne |
| Weight-to-torque ratio | 2.6 kg/Nm, 388.8 Nm/tonne |
| Power | 517 Hp @ 5000 rpm |
| Power per litre | 93.8 Hp/l |
| Torque | 830 Nm @ 1800-3500 rpm (612.18 lb.-ft. @ 1800-3500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 275.953 |
| Engine displacement | 5513 cm3 (336.42 cu. in.) |
| Number of cylinders | 12 |
| Engine configuration | V-engine |
| Cylinder Bore | 82 mm (3.23 in.) |
| Piston Stroke | 87 mm (3.43 in.) |
| Compression ratio | 9:1 |
| Number of valves per cylinder | 3 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | BiTurbo, Intercooler |
| Valvetrain | SOHC |
| Engine oil capacity | 9 l (9.51 US qt | 7.92 UK qt) |
| Coolant | 8.8 l (9.3 US qt | 7.74 UK qt) |
| Kerb Weight | 2135 kg (4706.87 lbs.) |
| Max. weight | 2690 kg (5930.43 lbs.) |
| Max load | 555 kg (1223.57 lbs.) |
| Trunk (boot) space – minimum | 550 l (19.42 cu. ft.) |
| Fuel tank capacity | 90 l (23.78 US gal | 19.8 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (12%) | 2100 kg (4629.71 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 5209 mm (205.08 in.) |
| Width | 1872 mm (73.7 in.) |
| Width including mirrors | 2115 mm (83.27 in.) |
| Height | 1473 mm (57.99 in.) |
| Wheelbase | 3165 mm (124.61 in.) |
| Front track | 1604 mm (63.15 in.) |
| Rear (Back) track | 1606 mm (63.23 in.) |
| Front overhang | 871 mm (34.29 in.) |
| Rear overhang | 1173 mm (46.18 in.) |
| Ride height (ground clearance) | 146 mm (5.75 in.) |
| Drag coefficient (Cd) | 0.28 |
| Minimum turning circle (turning diameter) | 12.2 m (40.03 ft.) |
| Approach angle | 14.7° |
| Departure angle | 15° |
| Ramp-over (brakeover) angle | 10.7° |
| 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 | 5 gears, automatic transmission G-TRONIC |
| Front suspension | Hydraulic elements, Independent multi-link suspension, 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: 255/45 R18Rear wheel tires: 275/45 R18 |
| Wheel rims size | Front wheel rims: 8.5J x 18Rear wheel rims: 9.5J x 18 |
Powertrain & Engine Architecture
The heart of the S 600 V12 was the M275.953 engine, a 5.5-liter, naturally aspirated V12. This engine produced 517 horsepower at 5000 rpm and a substantial 830 Nm (612 lb-ft) of torque between 1800 and 3500 rpm. The engine featured a single overhead camshaft (SOHC) design per cylinder bank, three valves per cylinder, and a multi-port fuel injection system. Crucially, it employed twin turbochargers with intercooling, contributing to both its high power output and relatively smooth power delivery. The engine’s robust construction and sophisticated engineering were hallmarks of Mercedes-Benz’s commitment to refinement and longevity. Paired with the engine was the 5G-TRONIC automatic transmission, a five-speed unit known for its smooth shifts and responsiveness. While not as many gears as modern automatics, it was well-matched to the engine’s torque curve.
Driving Characteristics
The S 600 V12 offered a driving experience focused on effortless power and supreme comfort. The V12 engine delivered a surge of torque at low revs, making overtaking and highway cruising remarkably easy. Acceleration to 60 mph took approximately 4.4 seconds, and the electronically limited top speed of 155 mph was readily achievable. Compared to the V8-powered S550 or even the supercharged S63 AMG, the V12 prioritized smooth, linear power delivery over outright aggression. The 5G-TRONIC transmission contributed to this refined experience, providing seamless gear changes. However, the sheer weight of the vehicle (over 4700 lbs) meant it wasn’t as agile or sporty as some of its competitors.
Equipment & Trim Levels
As the range-topping model, the S 600 V12 came standard with a comprehensive array of luxury features. These included premium leather upholstery, wood trim, a sophisticated audio system, multi-contour seats with massage function, and a climate control system with individual settings for each passenger. The extended wheelbase provided significantly more rear legroom, often paired with executive rear seat packages including reclining seats, a rear entertainment system, and a refrigerated compartment. Optional extras included advanced driver-assistance systems like Distronic Plus (adaptive cruise control), Pre-Safe brake assist, and a night vision system.
Chassis & Braking
The V221 S-Class featured an advanced chassis design with an independent multi-link suspension at both the front and rear. Hydraulic elements were used in the suspension system, contributing to a smooth and controlled ride. The S 600 V12 was equipped with ventilated disc brakes on all four wheels, providing ample stopping power. An Anti-lock Braking System (ABS) was standard. The suspension was tuned for comfort, prioritizing a smooth ride over sporty handling, although the car remained stable and predictable in corners.
Market Reception & Comparison
The S 600 V12 was generally well-received by automotive critics, who praised its luxurious interior, powerful engine, and refined driving experience. However, its high price tag and substantial fuel consumption were often noted. Compared to the S550, the V12 offered significantly more power and a more prestigious image, but at a considerable cost. Against the BMW 760Li and Audi A8 L W12, the S 600 V12 held its own in terms of luxury and performance, though some reviewers found the BMW to be more engaging to drive. Fuel economy was predictably poor, averaging around 16 mpg combined.
Legacy
The M275 V12 engine, while complex, proved to be relatively reliable when properly maintained. Common issues included occasional problems with the air suspension system and the electronic components. Today, the V221 S 600 V12 represents a unique proposition in the used car market. It offers a level of luxury and performance that is rarely found in older vehicles, but requires a dedicated owner willing to invest in its upkeep. Parts can be expensive, and specialized knowledge is often required for maintenance and repairs. Despite these challenges, the S 600 V12 remains a desirable car for enthusiasts seeking a truly exceptional grand touring experience.
