The Mercedes-Benz E 300 BLUETEC V6, part of the W211 E-Class facelift introduced in 2006, represented a significant step in diesel technology for the American market. Produced from 2007 through 2009, this variant combined a powerful 3.0-liter V6 diesel engine with the sophisticated 7G-TRONIC seven-speed automatic transmission. It was positioned as a premium offering within the E-Class range, bridging the gap between the more affordable four-cylinder models and the high-performance E 550 and E 63 AMG variants. The introduction of BLUETEC technology aimed to meet increasingly stringent emissions standards while delivering a refined and efficient driving experience.
| Brand | Mercedes-Benz |
| Model | E-Class |
| Generation | E-Class (W211, facelift 2006) |
| Type (Engine) | E 300 BLUETEC V6 (211 Hp) 7G-TRONIC |
| Start of production | 2007 |
| End of production | 2009 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 9.9-10.1 l/100 km (23.8 – 23.3 US mpg) |
| Fuel consumption (extra urban) | 5.6-5.9 l/100 km (42 – 39.9 US mpg) |
| Fuel consumption (combined) | 7.2-7.5 l/100 km (32.7 – 31.4 US mpg) |
| CO2 emissions | 189-199 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 7.2 sec |
| Acceleration 0 – 60 mph | 6.8 sec |
| Maximum speed | 244 km/h (151.61 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 7.9 kg/Hp |
| Weight-to-torque ratio | 3.1 kg/Nm |
| Power | 211 Hp @ 3400 rpm |
| Torque | 540 Nm @ 1600-2400 rpm (398.28 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 642.940 |
| 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.) |
| Compression ratio | 16.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 8.5 l (8.98 US qt | 7.48 UK qt) |
| Coolant capacity | 13 l (13.74 US qt | 11.44 UK qt) |
| Kerb Weight | 1660 kg (3659.67 lbs.) |
| Max. weight | 2260 kg (4982.45 lbs.) |
| Max load | 600 kg (1322.77 lbs.) |
| Trunk (boot) space | 540 l (19.07 cu. ft.) |
| Fuel tank capacity | 65 l (17.17 US gal | 14.3 UK gal) |
| Permitted trailer load (braked) | 1900 kg (4188.78 lbs.) |
| Permitted trailer load (unbraked) | 750 kg (1653.47 lbs.) |
| Length | 4856 mm (191.18 in.) |
| Width | 1822 mm (71.73 in.) |
| Width including mirrors | 2063 mm (81.22 in.) |
| Height | 1484 mm (58.43 in.) |
| Wheelbase | 2854 mm (112.36 in.) |
| Front track | 1559 mm (61.38 in.) |
| Rear track | 1552 mm (61.1 in.) |
| Front overhang | 869 mm (34.21 in.) |
| Rear overhang | 1133 mm (44.61 in.) |
| Minimum turning circle | 11.4 m (37.4 ft.) |
| Drivetrain | Rear wheel drive |
| Number of gears | 7 |
| Gearbox type | Automatic transmission G-TRONIC |
| Front suspension | Independent multi-link, Transverse stabilizer |
| Rear suspension | Independent multi-link, Transverse stabilizer |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
Powertrain & Engine Architecture
The heart of the E 300 BLUETEC was the OM 642.940 3.0-liter V6 diesel engine. This engine utilized a common rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. A variable geometry turbocharger (VGT) and intercooler further enhanced performance and efficiency. The engine featured a double overhead camshaft (DOHC) valvetrain with four valves per cylinder, contributing to its smooth operation and power output. The BLUETEC system itself was a crucial component, employing a combination of technologies – including a particulate filter, oxidation catalytic converter, and NOx storage catalyst – to significantly reduce harmful emissions. This allowed Mercedes-Benz to meet the stringent Euro 4 emission standards. The 7G-TRONIC automatic transmission, a seven-speed unit, was specifically tuned to complement the engine’s torque characteristics. It offered smooth and responsive shifting, contributing to both performance and fuel economy.
Driving Characteristics
The E 300 BLUETEC V6 offered a distinctly different driving experience compared to its gasoline-powered siblings or even other diesel variants within the E-Class range. The substantial 398 lb-ft of torque, available from a low 1600 rpm, provided effortless acceleration and strong passing power. While not as overtly sporty as the E 550, the E 300 BLUETEC delivered a refined and comfortable ride. The 7G-TRONIC transmission’s wide gear ratios allowed the engine to operate efficiently at highway speeds, contributing to excellent fuel economy. Compared to the manual transmission options available on other E-Class models, the automatic prioritized comfort and ease of use over outright driver engagement. The 0-60 mph time of around 6.8 seconds was respectable for a luxury sedan of its size and weight.
Equipment & Trim Levels
The E 300 BLUETEC typically came well-equipped, reflecting its position as a premium model. Standard features often included leather upholstery, automatic climate control, a premium audio system, and power-adjustable front seats. Options were plentiful, allowing buyers to customize their vehicles with features such as a navigation system, sunroof, upgraded wheels, and advanced driver-assistance systems like Distronic adaptive cruise control. Interior trim options ranged from wood veneers to aluminum accents, allowing for a personalized aesthetic. The overall interior ambiance was one of understated luxury and refinement, typical of the Mercedes-Benz brand.
Chassis & Braking
The W211 E-Class chassis featured an independent multi-link suspension at both the front and rear, providing a comfortable and controlled ride. A transverse stabilizer bar was included on both axles to minimize body roll during cornering. The E 300 BLUETEC was equipped with ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) was standard, enhancing safety and stability. The suspension tuning was geared towards comfort, prioritizing a smooth ride over aggressive handling. The steering system utilized a hydraulic power steering rack and pinion, offering precise and responsive control.
Market Reception & Comparison
The E 300 BLUETEC was generally well-received by automotive critics. It was praised for its refined engine, smooth transmission, and excellent fuel economy. The BLUETEC technology was seen as a significant advancement in diesel emissions control. Compared to the E 350 gasoline model, the E 300 BLUETEC offered comparable performance with significantly better fuel efficiency. However, the diesel engine did carry a higher initial cost. Against other diesel-powered competitors, such as the BMW 535d, the E 300 BLUETEC was often considered to offer a more luxurious and comfortable driving experience.
Legacy
The OM 642 engine family, including the 3.0-liter V6 used in the E 300 BLUETEC, has proven to be remarkably durable and reliable. While the BLUETEC system itself introduced some complexity, well-maintained examples have demonstrated long-term dependability. Today, the E 300 BLUETEC represents a compelling value in the used car market, offering a blend of luxury, performance, and fuel efficiency. However, potential buyers should be aware of the maintenance requirements associated with the diesel emissions system, including the particulate filter and NOx sensors. Proper maintenance is crucial to ensure the continued reliability and longevity of this sophisticated powertrain.
