The Mercedes-Benz S 350 Long, produced between 2009 and 2011 as part of the V221 facelift generation, represented a compelling blend of luxury, performance, and efficiency within the flagship S-Class range. Positioned as a mid-range offering, it slotted between the more powerful S 550 models and the fuel-conscious S 300 hybrid. The “Long” designation indicated an extended wheelbase, prioritizing rear passenger space – a particularly important feature in markets like China and other regions where chauffeur-driven travel was common. This variant aimed to deliver a refined driving experience without the outright performance focus of its higher-tier siblings, appealing to buyers who valued comfort and prestige above all else.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | S-class |
| Generation | S-class Long (V221, facelift 2009) |
| Type (Engine) | S 350 (272 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) | 14.6-14.8 l/100 km (16.1 – 15.9 US mpg, 19.3 – 19.1 UK mpg, 6.8 km/l) |
| Fuel consumption (extra urban) | 7.4-7.7 l/100 km (31.8 – 30.5 US mpg, 38.2 – 36.7 UK mpg, 13.5 – 13 km/l) |
| Fuel consumption (combined) | 10-10.2 l/100 km (23.5 – 23.1 US mpg, 28.2 – 27.7 UK mpg, 10 – 9.8 km/l) |
| CO2 emissions | 234-237 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 7.3 sec |
| Acceleration 0 – 62 mph | 7.3 sec |
| Acceleration 0 – 60 mph | 6.9 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Weight-to-power ratio | 6.9 kg/Hp, 144.7 Hp/tonne |
| Weight-to-torque ratio | 5.4 kg/Nm, 186.2 Nm/tonne |
| Power | 272 Hp @ 6000 rpm |
| Power per litre | 77.8 Hp/l |
| Torque | 350 Nm @ 2400-5000 rpm (258.15 lb.-ft. @ 2400-5000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 272.965 |
| Engine displacement | 3498 cm3 (213.46 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Compression ratio | 10.7:1 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Coolant capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Kerb Weight | 1880 kg (4144.69 lbs.) |
| Max. weight | 2535 kg (5588.72 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 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 | 235/55 R17 |
| Wheel rims size | 17 |
Powertrain & Engine Architecture
The S 350 Long was powered by the M272.965 3.5-liter naturally aspirated V6 engine. This engine, a staple of the Mercedes-Benz lineup during this period, featured a 60-degree V-angle and utilized a multi-port fuel injection system. The engine produced 272 horsepower at 6,000 rpm and 350 Nm (258 lb-ft) of torque between 2,400 and 5,000 rpm. The engine’s design prioritized smoothness and refinement over outright power, aligning with the S-Class’s luxury focus. The engine incorporated a relatively high 10.7:1 compression ratio for improved efficiency. Paired with the engine was the 7G-TRONIC seven-speed automatic transmission, known for its smooth and responsive shifts. This transmission was a key component in optimizing fuel economy and providing a comfortable driving experience. The transmission offered selectable driving modes, allowing drivers to tailor the shift points to their preferences.
Driving Characteristics
The S 350 Long, with its 272 hp and 7-speed automatic, delivered a composed and refined driving experience. Acceleration from 0 to 60 mph took approximately 6.9 seconds, which was respectable for a large luxury sedan, but noticeably slower than the V8-powered S 550 models. The G-TRONIC transmission played a crucial role in masking the engine’s limitations, providing seamless gear changes and keeping the engine within its optimal power band. The long wheelbase contributed to a smooth ride, effectively absorbing road imperfections. While not a sports car, the S 350 Long offered sufficient power for comfortable highway cruising and effortless overtaking. The automatic transmission’s gear ratios were tuned for fuel efficiency and relaxed driving, rather than aggressive acceleration.
Equipment & Trim Levels
The S 350 Long came standard with a comprehensive array of luxury features. These included leather upholstery, wood trim, dual-zone automatic climate control, a premium sound system, and a host of safety features like ABS, stability control, and multiple airbags. The extended wheelbase translated into significantly more rear legroom, enhancing passenger comfort. Optional extras included a panoramic sunroof, massaging seats, a rear entertainment system, and advanced driver-assistance systems like adaptive cruise control and lane-keeping assist. Interior color choices were extensive, allowing buyers to personalize their vehicle. The dashboard layout was typical of the V221 S-Class, featuring a blend of traditional elegance and modern technology.
Chassis & Braking
The S 350 Long utilized a fully independent suspension system, featuring air suspension on both the front and rear axles. This air suspension system provided a remarkably smooth ride and allowed for adjustable ride height. The braking system consisted of disc brakes on all four wheels, coupled with ABS and electronic brake-force distribution. While the braking performance was adequate for the vehicle’s weight and performance, it wasn’t as powerful as the larger brakes found on the higher-performance S-Class models. Stabilizer bars were fitted to both the front and rear axles to minimize body roll during cornering.
Market Reception & Comparison
The S 350 Long was generally well-received by automotive critics. It was praised for its comfortable ride, luxurious interior, and refined driving experience. However, some reviewers noted that the engine lacked the punch of the V8 options. Fuel economy was considered reasonable for a vehicle of its size and class, averaging around 23.5 mpg in combined driving. Compared to the S 550, the S 350 Long offered a more affordable entry point into the S-Class range, albeit with a noticeable performance deficit. Compared to the later S 300 Hybrid, the S 350 offered a more traditional driving experience, lacking the electric motor assistance of the hybrid model.
Legacy
The M272 engine, while generally reliable, is known to require regular maintenance, particularly regarding oil changes and valve cover gasket replacements. The 7G-TRONIC transmission is also relatively robust but can exhibit issues with the valve body and conductor plate over time. Today, the S 350 Long represents a relatively affordable way to experience the luxury and prestige of the Mercedes-Benz S-Class. Well-maintained examples are still sought after by enthusiasts who appreciate the car’s blend of comfort, refinement, and classic Mercedes-Benz styling. The extended wheelbase version remains particularly desirable in markets where rear passenger space is a priority.
