The Mercedes-Benz E 350 BlueEFFICIENCY, produced between 2009 and 2011, was a key variant within the W212 E-Class range. Positioned as a mid-to-upper trim level, it offered a balance of performance and efficiency, appealing to buyers seeking a refined luxury sedan with a capable engine. This model featured a 3.5-liter V6 engine paired with the 7G-TRONIC automatic transmission, representing a significant step up from the base E 300 models while remaining more accessible than the high-performance E 63 AMG. The W212 generation, launched in 2009, aimed to modernize the E-Class, offering a more technologically advanced and stylish alternative to its predecessor.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | E-class |
| Generation | E-class (W212) |
| Type | E 350 BlueEFFICIENCY V6 (292 Hp) 7G-TRONIC |
| Start of production | 2009 |
| End of production | 2011 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 12.4-12.5 l/100 km (19 – 18.8 US mpg) |
| Fuel consumption (extra urban) | 6.3-6.6 l/100 km (37.3 – 35.6 US mpg) |
| Fuel consumption (combined) | 8.5-8.8 l/100 km (27.7 – 26.7 US mpg) |
| CO2 emissions | 199-205 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.8 sec |
| Acceleration 0 – 60 mph | 6.5 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 5.7 kg/Hp |
| Weight-to-torque ratio | 4.5 kg/Nm |
| Power | 292 Hp @ 6400 rpm |
| Torque | 365 Nm @ 3000-5100 rpm (269.21 lb.-ft. @ 3000-5100 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 272.983 |
| Engine displacement | 3489 cm3 (212.91 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 92.9 mm (3.66 in.) |
| Piston Stroke | 86 mm (3.39 in.) |
| Compression ratio | 12.2:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Kerb Weight | 1660 kg (3659.67 lbs.) |
| Max. weight | 2280 kg (5026.54 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) |
| Permitted trailer load with brakes (12%) | 2000 kg (4409.25 lbs.) |
| Length | 4868 mm (191.65 in.) |
| Width | 1854 mm (72.99 in.) |
| Width including mirrors | 2071 mm (81.54 in.) |
| Height | 1470 mm (57.87 in.) |
| Wheelbase | 2874 mm (113.15 in.) |
| Front track | 1600 mm (62.99 in.) |
| Rear track | 1619 mm (63.74 in.) |
| Front overhang | 841 mm (33.11 in.) |
| Rear overhang | 1153 mm (45.39 in.) |
| Minimum turning circle | 11.25 m (36.91 ft.) |
| Drivetrain | Rear wheel drive |
| Number of gears | 7 |
| Gearbox type | Automatic transmission G-TRONIC |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
Powertrain & Engine Architecture
The heart of the E 350 BlueEFFICIENCY is the M272.983 3.5-liter V6 engine. This naturally aspirated engine utilizes a 60-degree V-angle configuration, contributing to its smooth operation. It features a sophisticated direct fuel injection system, enhancing both power and fuel efficiency. The engine employs a double overhead camshaft (DOHC) valvetrain with four valves per cylinder, optimizing airflow for improved performance. The “BlueEFFICIENCY” designation indicates the inclusion of various fuel-saving technologies, including optimized engine management and reduced internal friction. Paired with this engine is the 7G-TRONIC seven-speed automatic transmission. This transmission is known for its smooth and responsive shifts, contributing to a comfortable driving experience. It features a torque converter lock-up clutch that engages at higher speeds to improve fuel economy. The transmission’s gear ratios are tuned to balance acceleration and cruising efficiency.
Driving Characteristics
The E 350 BlueEFFICIENCY offered a refined and comfortable driving experience. The 292 horsepower and 269 lb-ft of torque provided ample power for both city driving and highway cruising. Acceleration from 0 to 60 mph was achieved in approximately 6.5 seconds, making it a reasonably quick sedan. Compared to the E 300, the E 350 offered noticeably more power and responsiveness. While not as sporty as the E 550 or the AMG models, the E 350 provided a good balance between performance and comfort. The 7G-TRONIC transmission contributed to smooth gear changes, and the engine delivered a linear power delivery. The rear-wheel-drive configuration provided a balanced feel, although it could be less confident in slippery conditions compared to all-wheel-drive variants.
Equipment & Trim Levels
The E 350 BlueEFFICIENCY typically came standard with a generous array of features. These included leather upholstery, power-adjustable front seats with memory function, dual-zone automatic climate control, a premium audio system, and a multi-function steering wheel. Standard safety features included anti-lock brakes (ABS), electronic stability control, and a comprehensive airbag system. Optional extras included a navigation system, a panoramic sunroof, adaptive cruise control, and parking assist. Interior trim options varied, with choices in wood veneers and aluminum accents. The dashboard layout was typical of Mercedes-Benz, emphasizing a luxurious and sophisticated aesthetic.
Chassis & Braking
The W212 E-Class utilized an independent multi-link suspension system at both the front and rear axles. This suspension design provided a comfortable ride while maintaining good handling characteristics. The E 350 typically featured ventilated disc brakes on all four wheels, providing ample stopping power. The ABS system helped to prevent wheel lock-up during hard braking. Stabilizer bars were fitted to both the front and rear axles to reduce body roll during cornering. The steering system was a hydraulic power steering rack and pinion, offering precise and responsive steering feel.
Market Reception & Comparison
The E 350 BlueEFFICIENCY was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and luxurious interior. Fuel economy was considered respectable for a V6-powered luxury sedan, although it wasn’t class-leading. Compared to the E 300, the E 350 offered a significant performance upgrade, justifying the higher price. Compared to the E 550, the E 350 was more fuel-efficient and offered a more balanced driving experience. Reliability was generally good, although some owners reported minor issues with electronic components.
Legacy
The M272 engine family, including the 3.5-liter variant found in the E 350, has proven to be relatively reliable over the long term. With proper maintenance, these engines can exceed 150,000 miles without major issues. The 7G-TRONIC transmission is also known for its durability. In the used car market, the W212 E 350 BlueEFFICIENCY remains a popular choice for buyers seeking a well-equipped and reliable luxury sedan. Its combination of performance, comfort, and fuel efficiency continues to make it a compelling option, even compared to newer models. However, potential buyers should be aware of the potential for age-related maintenance issues, such as worn suspension components and electronic system glitches.
