The Mercedes-Benz S 350 BlueTEC, produced between 2013 and 2016, was a diesel-powered variant of the W222 generation S-Class. Positioned as a mid-range offering within the S-Class lineup, it provided a balance between luxury, performance, and fuel efficiency. The W222 S-Class represented a significant leap forward in automotive technology, introducing innovations in safety, comfort, and driver assistance systems. The S 350 BlueTEC specifically aimed to appeal to buyers seeking a refined and capable luxury sedan with lower running costs than its gasoline-powered counterparts, while still delivering the prestige associated with the S-Class nameplate. It served as a bridge between the entry-level S 300 Hybrid (in some markets) and the more powerful S 500 models.
Powertrain & Engine Architecture
The heart of the S 350 BlueTEC is the OM642.861 3.0-liter V6 diesel engine. This engine is a longitudinally-mounted, turbocharged and intercooled design, featuring a common rail direct fuel injection system. The OM642 engine family is well-regarded for its durability and refinement. The 2013-2016 S 350 BlueTEC version produces 258 horsepower at 3600 rpm and a substantial 620 Nm (457.29 lb-ft) of torque between 1600 and 2400 rpm. This broad torque curve contributes to effortless acceleration and strong in-gear performance.
The engine utilizes a high-pressure common rail system, injecting fuel directly into the combustion chamber at pressures up to 2,000 bar. This precise fuel delivery optimizes combustion efficiency and reduces emissions. The turbocharger, coupled with an intercooler, increases air density entering the engine, boosting power output. The engine also incorporates a diesel particulate filter (DPF) to further reduce harmful emissions, meeting stringent Euro 6 standards. Compression ratio is set at 15.5:1. Engine oil capacity is 8 liters (8.45 US qt / 7.04 UK qt), and coolant capacity is 11.6 liters (12.26 US qt / 10.21 UK qt).
Paired with the engine is the 7G-TRONIC PLUS seven-speed automatic transmission. This transmission is known for its smooth and responsive shifts, contributing to a comfortable driving experience. The 7G-TRONIC PLUS utilizes a torque converter and planetary gearsets to provide seamless gear changes. It features adaptive shift programs that adjust to the driver’s style and driving conditions.
Driving Characteristics
The S 350 BlueTEC delivers a refined and composed driving experience. The abundant torque from the diesel engine provides strong acceleration, with a 0-60 mph time of approximately 6.5 seconds and a 0-100 km/h time of 6.8 seconds. While not as overtly sporty as the higher-powered S 500 models, the S 350 BlueTEC offers more than adequate performance for most driving situations. The 7G-TRONIC transmission contributes to smooth and effortless cruising, with well-chosen gear ratios that keep the engine in its optimal power band. Compared to the gasoline-powered S 500, the S 350 BlueTEC feels less eager to rev, but offers superior fuel economy and a more relaxed driving experience. The rear-wheel drive configuration provides a balanced feel, although all-wheel drive (4MATIC) was available as an option in some markets.
Equipment & Trim Levels
The S 350 BlueTEC came standard with a comprehensive array of luxury features, befitting its S-Class designation. Standard equipment typically included leather upholstery, power-adjustable front seats with memory function, dual-zone automatic climate control, a premium sound system, and a navigation system. The interior featured high-quality materials and meticulous craftsmanship. The dashboard layout was elegant and modern, with a large central display screen controlling many of the vehicle’s functions.
Optional extras were plentiful, allowing buyers to customize their S 350 BlueTEC to their preferences. Popular options included a panoramic sunroof, rear seat entertainment system, massaging seats, a Burmester surround sound system, and advanced driver assistance systems such as adaptive cruise control, lane keeping assist, and blind spot monitoring. Trim levels were generally differentiated by the availability of these optional packages, rather than significant changes to the core features.
Chassis & Braking
The S 350 BlueTEC utilizes an independent multi-link suspension system at both the front and rear axles. This suspension design provides a comfortable ride and precise handling. The suspension is tuned to prioritize comfort, absorbing bumps and imperfections in the road surface effectively. The car’s kerb weight is 1880 kg (4144.69 lbs), with a maximum weight of 2655 kg (5853.27 lbs).
Braking duties are handled by ventilated disc brakes at all four corners. The braking system is equipped with ABS (Anti-lock Braking System) and electronic brake-force distribution to ensure safe and controlled stopping performance. The steering system is a rack-and-pinion setup with electric power steering, providing precise and responsive steering feel. Standard tire size is 245/55 R17, mounted on 17-inch alloy wheels.
Market Reception & Comparison
The S 350 BlueTEC was generally well-received by automotive critics. It was praised for its refined driving experience, luxurious interior, and impressive fuel economy. The diesel engine was noted for its quiet operation and strong torque output. Compared to the gasoline-powered S 500, the S 350 BlueTEC offered a more affordable entry point into the S-Class range, without sacrificing too much in terms of luxury or performance. Fuel consumption figures ranged from 5.5-5.9 l/100 km (42.8 – 39.9 US mpg / 51.4 – 47.9 UK mpg), making it a particularly attractive option for drivers who cover long distances. However, some critics noted that the diesel engine lacked the responsiveness and refinement of the gasoline engines.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | S-Class |
| Generation | S-Class (W222) |
| Type | S 350 BlueTEC (258 Hp) 7G-TRONIC |
| Start of production | 2013 |
| End of production | 2016 |
| Engine | OM 642.861 3.0L V6 Diesel |
| Power | 258 Hp @ 3600 rpm |
| Torque | 620 Nm @ 1600-2400 rpm (457.29 lb-ft) |
| Fuel Consumption (Urban) | 7.0-7.3 l/100 km (33.6 – 32.2 US mpg) |
| Fuel Consumption (Extra Urban) | 4.7-5.1 l/100 km (50 – 46.1 US mpg) |
| Fuel Consumption (Combined) | 5.5-5.9 l/100 km (42.8 – 39.9 US mpg) |
| CO2 Emissions | 146-155 g/km |
| Transmission | 7G-TRONIC PLUS 7-speed Automatic |
| Kerb Weight | 1880 kg (4144.69 lbs) |
| Fuel Tank Capacity | 70 l (18.49 US gal) |
| Length | 5116 mm (201.42 in) |
| Width | 1899 mm (74.76 in) |
| Height | 1496 mm (58.9 in) |
Legacy
The S 350 BlueTEC, with its OM642 engine and 7G-TRONIC transmission, has proven to be a relatively reliable powertrain combination. The OM642 engine is known for its robustness, and with proper maintenance, can accumulate high mileage. Common issues, like with any diesel, can include DPF clogging and injector wear, but these are generally manageable with preventative maintenance. On the used car market, the S 350 BlueTEC represents a good value proposition, offering S-Class luxury and refinement at a more accessible price point than its gasoline counterparts. Its fuel efficiency and relatively low running costs make it an attractive option for buyers seeking a comfortable and capable luxury sedan.
