The Mercedes-Benz E 350 BlueTEC V6 (258 hp) with the 9G-TRONIC automatic transmission, produced from July 2014 to January 2016, represents a significant iteration of the W212 facelifted E-Class. Positioned as a mid-to-upper trim level, this variant offered a compelling blend of performance, efficiency, and luxury within the E-Class range. It was designed to appeal to buyers seeking a refined diesel experience with advanced technology, particularly in European markets where diesel engines held a strong preference. This model benefited from the extensive updates introduced with the 2013 facelift, including revised styling, enhanced interior features, and the introduction of the 9G-TRONIC transmission.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | E-class |
| Generation | E-class (W212, facelift 2013) |
| Type (Engine) | E 350 BlueTEC V6 (258 Hp) 9G-TRONIC |
| Start of production | July, 2014 |
| End of production | January, 2016 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban (NEDC) | 6.1-6.3 l/100 km (38.6 – 37.3 US mpg, 46.3 – 44.8 UK mpg, 16.4 – 15.9 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 4.5-4.8 l/100 km (52.3 – 49 US mpg, 62.8 – 58.9 UK mpg, 22.2 – 20.8 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 5-5.3 l/100 km (47 – 44.4 US mpg, 56.5 – 53.3 UK mpg, 20 – 18.9 km/l) |
| CO2 emissions (NEDC) | 133-139 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6.4 sec |
| Acceleration 0 – 62 mph | 6.4 sec |
| Acceleration 0 – 60 mph | 6.1 sec |
| Maximum speed | 250 km/h (155.34 mph), Electronically limited |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 6.9 kg/Hp, 145.8 Hp/tonne |
| Weight-to-torque ratio | 2.9 kg/Nm, 350.3 Nm/tonne |
| Power | 258 Hp @ 3400 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) |
| Coolant | 10.8 l (11.41 US qt | 9.5 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 – minimum | 490 l (17.3 cu. ft.) |
| Fuel tank capacity | 59 l (15.59 US gal | 12.98 UK gal) |
| AdBlue tank | 25.5 l (6.74 US gal | 5.61 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.) |
| Permitted towbar download | 84 kg (185.19 lbs.) |
| Length | 4879 mm (192.09 in.) |
| Width | 1854 mm (72.99 in.) |
| Width including mirrors | 2071 mm (81.54 in.) |
| Height | 1474 mm (58.03 in.) |
| Wheelbase | 2874 mm (113.15 in.) |
| Front track | 1598 mm (62.91 in.) |
| Rear (Back) track | 1614 mm (63.54 in.) |
| Front overhang | 849 mm (33.43 in.) |
| Rear overhang | 1156 mm (45.51 in.) |
| Minimum turning circle (turning diameter) | 11.28 m (37.01 ft.) |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 9 gears, automatic transmission G-TRONIC |
Powertrain & Engine Architecture
The heart of the E 350 BlueTEC was the OM 642.852 3.0-liter V6 diesel engine. This engine represented a sophisticated application of diesel technology, featuring a common rail direct injection system, a variable geometry turbocharger, and an intercooler. The common rail system, operating at extremely high pressures, allowed for precise fuel metering and optimized combustion. The V6 configuration provided inherent smoothness and balance compared to inline engines. The engine produced 258 horsepower at 3400 rpm and a substantial 620 Nm (457 lb-ft) of torque between 1600 and 2400 rpm. This broad torque curve was a key characteristic, providing strong acceleration in various driving situations. The 9G-TRONIC nine-speed automatic transmission was a crucial component, offering a wider range of gear ratios than previous transmissions. This contributed to improved fuel efficiency and smoother shifts. The transmission’s close ratios kept the engine operating within its optimal torque band.
Driving Characteristics
The E 350 BlueTEC 9G-TRONIC delivered a refined and effortless driving experience. The abundant low-end torque made overtaking and merging onto highways easy and confident. While not a sports car, the combination of the V6 engine and the nine-speed transmission provided brisk acceleration – 0 to 60 mph in approximately 6.1 seconds. The 9G-TRONIC transmission was generally smooth and responsive, although some drivers noted occasional hesitancy during downshifts. Compared to the E 250 BlueTEC (with its lower horsepower and torque) or the E 400 (with its gasoline V6), the E 350 BlueTEC struck a balance between performance and fuel economy. The long gear ratios in the 9G-TRONIC helped to keep engine speeds low at highway speeds, contributing to a quiet and comfortable ride.
Equipment & Trim Levels
The E 350 BlueTEC typically came well-equipped, reflecting its position in the E-Class lineup. Standard features included leather upholstery, automatic climate control, a premium audio system, and a suite of safety technologies such as adaptive cruise control, lane keeping assist, and automatic emergency braking. Optional extras included a panoramic sunroof, upgraded leather, a head-up display, and a rear-seat entertainment system. The interior design was characterized by Mercedes-Benz’s signature blend of luxury and technology, with high-quality materials and a user-friendly infotainment system.
Chassis & Braking
The W212 E-Class featured a multi-link independent suspension at all four corners. The E 350 BlueTEC typically came with steel springs, although air suspension was available as an option, providing a more comfortable and adjustable ride. Braking duties were handled by ventilated discs on all four wheels, providing ample stopping power. Anti-lock brakes (ABS), electronic stability control (ESC), and traction control were standard safety features. The steering was precise and well-weighted, offering a good balance between feedback and ease of use.
Market Reception & Comparison
The E 350 BlueTEC was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and advanced technology. Fuel economy was a significant selling point, with the E 350 BlueTEC achieving combined fuel consumption figures of around 47-44.4 US mpg. Compared to the gasoline-powered E 350, the BlueTEC offered significantly better fuel economy, although it came with a slightly higher purchase price. Reliability was generally good, although some owners reported issues with the AdBlue system and the diesel particulate filter.
Legacy
The OM 642 engine family, including the OM 642.852 found in the E 350 BlueTEC, is known for its durability and longevity when properly maintained. These engines are capable of high mileage with regular servicing. On the used car market, the W212 E 350 BlueTEC remains a popular choice for buyers seeking a comfortable, efficient, and well-equipped luxury sedan. However, potential buyers should be aware of the potential maintenance costs associated with diesel engines, particularly the AdBlue system and the diesel particulate filter. The 9G-TRONIC transmission has also proven to be generally reliable, but regular fluid changes are essential to ensure its long-term health.
