The Mercedes-Benz E 350 CDI BlueEFFICIENCY, produced between 2010 and January 2013, was a key variant within the W212 E-Class range. Positioned as a premium executive sedan, it offered a blend of performance, efficiency, and luxury. This specific model combined a 3.0-liter turbocharged diesel V6 engine with the 7G-TRONIC PLUS seven-speed automatic transmission, targeting buyers seeking a refined and capable grand tourer. It represented a significant offering in the European market, where diesel engines were – and continue to be – highly favored for their fuel economy and torque characteristics. In the US market, while diesel options were less common, the E 350 CDI appealed to those prioritizing long-distance comfort and fuel efficiency.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | E-class |
| Generation | E-class (W212) |
| Type | E 350 CDI BlueEFFICIENCY V6 (265 Hp) 7G-TRONIC PLUS |
| Start of production | 2010 |
| End of production | January, 2013 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 7.1-7.3 l/100 km (33.1 – 32.2 US mpg) |
| Fuel consumption (extra urban) | 5.1-5.4 l/100 km (46.1 – 43.6 US mpg) |
| Fuel consumption (combined) | 5.8-6.1 l/100 km (40.6 – 38.6 US mpg) |
| CO2 emissions | 153-159 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6.2 sec |
| Acceleration 0 – 62 mph | 6.2 sec |
| Acceleration 0 – 60 mph | 5.9 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 6.7 kg/Hp |
| Weight-to-torque ratio | 2.9 kg/Nm |
| Power | 265 Hp @ 3800 rpm |
| Torque | 620 Nm @ 1600-2400 rpm (457.29 lb.-ft. @ 1600-2400 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 642.852 |
| Engine displacement | 2987 cm3 (182.28 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 92 mm (3.62 in.) |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Kerb Weight | 1770 kg (3902.18 lbs.) |
| Max. weight | 2390 kg (5269.05 lbs.) |
| Max load | 620 kg (1366.87 lbs.) |
| Trunk (boot) space | 540 l (19.07 cu. ft.) |
| Fuel tank capacity | 80 l (21.13 US gal | 17.6 UK gal) |
| Length | 4868 mm (191.65 in.) |
| Width | 1854 mm (72.99 in.) |
| Height | 1471 mm (57.91 in.) |
| Wheelbase | 2874 mm (113.15 in.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears | 7 |
| Gearbox type | automatic transmission G-TRONIC PLUS |
Powertrain & Engine Architecture
The heart of the E 350 CDI BlueEFFICIENCY is the OM 642.852 3.0-liter V6 diesel engine. This engine is a member of the OM642 family, known for its robust construction and refined operation. It features a common rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. The engine utilizes a variable geometry turbocharger (VGT) and an intercooler to enhance power and efficiency. The VGT adjusts the turbine vanes to optimize airflow across the engine’s operating range, improving both low-end torque and high-end power. The 7G-TRONIC PLUS automatic transmission is a seven-speed unit that provides smooth and efficient gear changes. It features a torque converter lock-up clutch that engages in most gears, reducing slippage and improving fuel economy. The transmission also offers a manual shift mode for greater driver control.
Driving Characteristics
The E 350 CDI BlueEFFICIENCY delivers a relaxed and refined driving experience. The 620 Nm (457 lb-ft) of torque available from 1600-2400 rpm provides effortless acceleration in most driving situations. While not as overtly sporty as the gasoline-powered E 350 or E 550 models, the CDI offers strong performance, achieving 0-60 mph in around 5.9 seconds. The 7G-TRONIC PLUS transmission contributes to smooth gear changes, and the relatively long gear ratios prioritize fuel efficiency over outright acceleration. Compared to the E 350 with the gasoline engine, the CDI offers superior fuel economy and low-end torque, making it ideal for long-distance cruising and towing. However, it lacks the higher-revving character and responsiveness of the gasoline engine.
Equipment & Trim Levels
The E 350 CDI BlueEFFICIENCY typically came well-equipped, reflecting its position as a premium model. Standard features included leather upholstery, automatic climate control, a premium sound system, and a host of safety features such as ABS, ESP, and multiple airbags. Optional extras included a navigation system, a panoramic sunroof, adaptive cruise control, and various driver assistance systems. Trim levels varied depending on the market, but generally offered options for upgraded interior materials, exterior styling enhancements, and additional technology features.
Chassis & Braking
The W212 E-Class featured a sophisticated chassis design with an independent multi-link suspension at both the front and rear. This suspension setup provides a comfortable ride and good handling characteristics. The E 350 CDI BlueEFFICIENCY typically came equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The steering system is a hydraulic power-assisted rack and pinion system, offering precise and responsive steering feel.
Market Reception & Comparison
The E 350 CDI BlueEFFICIENCY was generally well-received by automotive critics. It was praised for its fuel efficiency, strong torque, and refined driving experience. However, some critics noted that the diesel engine could be somewhat noisy compared to gasoline engines. Compared to other E-Class variants, the CDI offered a compelling alternative for buyers prioritizing fuel economy and low-cost operation. It was often seen as a more practical choice than the more powerful, but less efficient, gasoline models.
Legacy
The OM 642 engine family, including the OM 642.852 found in the E 350 CDI, has a reputation for durability and reliability. With proper maintenance, these engines can accumulate high mileage without major issues. The 7G-TRONIC PLUS transmission is also generally reliable, although some units may require fluid changes and occasional servicing. On the used car market, the E 350 CDI BlueEFFICIENCY remains a popular choice for buyers seeking a comfortable, efficient, and well-equipped executive sedan. However, potential buyers should be aware of the potential for diesel emissions system issues, particularly with older models.
