The Mercedes-Benz E 250 CDI BlueEFFICIENCY, produced between 2011 and January 2013, was a key variant within the W212 E-Class range. Positioned as a fuel-efficient and refined option, it catered to buyers seeking a balance between performance and economy in the mid-size executive car segment. This model represented Mercedes-Benz’s commitment to diesel technology, offering a compelling alternative to gasoline-powered E-Class models. It was primarily marketed in Europe and other regions where diesel fuel was prevalent, offering a sophisticated and comfortable driving experience.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | E-class |
| Generation | E-class (W212) |
| Type | E 250 CDI BlueEFFICIENCY (204 Hp) 7G-TRONIC PLUS |
| Start of production | 2011 |
| End of production | January, 2013 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 6.2-6.6 l/100 km (37.9 – 35.6 US mpg, 45.6 – 42.8 UK mpg, 16.1 – 15.2 km/l) |
| Fuel consumption (extra urban) | 4.2-4.5 l/100 km (56 – 52.3 US mpg, 67.3 – 62.8 UK mpg, 23.8 – 22.2 km/l) |
| Fuel consumption (combined) | 4.9-5.3 l/100 km (48 – 44.4 US mpg, 57.6 – 53.3 UK mpg, 20.4 – 18.9 km/l) |
| CO2 emissions | 129-138 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 7.5 sec |
| Acceleration 0 – 62 mph | 7.5 sec |
| Acceleration 0 – 60 mph | 7.1 sec |
| Maximum speed | 242 km/h (150.37 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 8.1 kg/Hp, 122.9 Hp/tonne |
| Weight-to-torque ratio | 3.3 kg/Nm, 301.2 Nm/tonne |
| Power | 204 Hp @ 4200 rpm |
| Torque | 500 Nm @ 1600-1800 rpm (368.78 lb.-ft. @ 1600-1800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 651.924 |
| Engine displacement | 2143 cm3 (130.77 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 99 mm (3.9 in.) |
| Compression ratio | 16.2:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | BiTurbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 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 (minimum) | 540 l (19.07 cu. ft.) |
| Fuel tank capacity | 59 l (15.59 US gal | 12.98 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load (with brakes) | 2000 kg (4409.25 lbs.) |
| Permitted trailer load (without brakes) | 750 kg (1653.47 lbs.) |
| Length | 4868 mm (191.65 in.) |
| Width | 1854 mm (72.99 in.) |
| Width including mirrors | 2071 mm (81.54 in.) |
| Height | 1471 mm (57.91 in.) |
| Wheelbase | 2874 mm (113.15 in.) |
| Front track | 1598 mm (62.91 in.) |
| Rear track | 1614 mm (63.54 in.) |
| Front overhang | 841 mm (33.11 in.) |
| Rear overhang | 1153 mm (45.39 in.) |
| Drag coefficient (Cd) | 0.26 |
| Minimum turning circle | 11.25 m (36.91 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears | 7 |
| Gearbox type | Automatic transmission G-TRONIC PLUS |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
INTRODUCTION
The W212 E-Class, produced from 2009 to 2016, represented a significant evolution in Mercedes-Benz’s mid-size executive sedan. The E 250 CDI BlueEFFICIENCY, introduced in 2011, was a diesel-powered variant designed to offer exceptional fuel economy without sacrificing the luxury and refinement expected of the E-Class. It utilized the OM651 engine family, known for its robust construction and efficiency. This model aimed to appeal to drivers covering long distances or prioritizing low running costs, and it quickly became a popular choice in European markets.
Powertrain & Engine Architecture
At the heart of the E 250 CDI BlueEFFICIENCY lies the OM 651.924 2.1-liter inline-four cylinder diesel engine. This engine is a highly advanced design featuring common-rail direct injection and a sophisticated bi-turbocharger system. The twin turbochargers, a smaller and a larger unit, work in sequence to provide both immediate throttle response and sustained power output across the rev range. The engine boasts a high compression ratio of 16.2:1, contributing to its thermal efficiency. The 7G-TRONIC PLUS seven-speed automatic transmission, a hallmark of Mercedes-Benz engineering, provides smooth and efficient gear changes. This transmission is known for its adaptability, offering both comfort and sport modes to suit different driving styles. The transmission’s gear ratios are optimized for both fuel economy and acceleration, with a relatively tall final drive to maximize efficiency at cruising speeds.
Driving Characteristics
The E 250 CDI BlueEFFICIENCY delivers a refined and comfortable driving experience. While not overtly sporty, the 204 horsepower and substantial 368 lb-ft of torque provide ample power for everyday driving and effortless highway cruising. Acceleration from 0-60 mph takes approximately 7.1 seconds, which is respectable for a diesel-powered executive sedan. The 7G-TRONIC PLUS transmission contributes to smooth acceleration, and the engine’s peak torque, available from just 1600 rpm, ensures strong pulling power in most situations. Compared to the more powerful E 350 models, the E 250 CDI offers a more relaxed and fuel-efficient driving experience. It lacks the outright performance of its gasoline siblings, but its superior fuel economy and lower emissions make it an attractive alternative for many drivers. The automatic transmission, while generally smooth, can sometimes feel slightly hesitant during quick downshifts.
Equipment & Trim Levels
The E 250 CDI BlueEFFICIENCY typically came well-equipped, reflecting its position within the E-Class range. Standard features included automatic climate control, a high-quality audio system, leather upholstery, and a multi-function steering wheel. Safety features were also comprehensive, including ABS, ESP, and multiple airbags. Optional extras included a navigation system, a panoramic sunroof, and advanced driver-assistance systems such as adaptive cruise control and lane-keeping assist. Interior trim levels varied, with options for different wood veneers and aluminum accents. The ‘BlueEFFICIENCY’ designation indicated the inclusion of fuel-saving technologies such as start-stop functionality and optimized aerodynamics.
Chassis & Braking
The W212 E-Class featured a sophisticated chassis design, with independent multi-link suspension at both the front and rear. This suspension setup provides a comfortable ride quality while maintaining good handling characteristics. The E 250 CDI, due to its weight, utilized a slightly firmer suspension setup compared to some of the lighter E-Class models. Braking duties were handled by ventilated discs at the front and solid discs at the rear, providing ample stopping power. ABS and ESP were standard, enhancing safety and stability. The steering system was a hydraulic power-assisted rack and pinion setup, offering precise and responsive steering feel.
Market Reception & Comparison
The E 250 CDI BlueEFFICIENCY was generally well-received by automotive critics. It was praised for its fuel efficiency, comfortable ride, and refined interior. Critics noted that while it wasn’t the most exciting car to drive, it excelled as a long-distance cruiser. Compared to other trims in the E-Class lineup, the E 250 CDI offered the best fuel economy, making it a popular choice for fleet buyers and private individuals alike. Its reliability was generally good, although some owners reported issues with the diesel particulate filter (DPF) system, a common concern with modern diesel engines. Compared to competitors such as the BMW 520d and Audi A6 2.0 TDI, the E 250 CDI offered a similar blend of performance, economy, and luxury.
Legacy
The E 250 CDI BlueEFFICIENCY remains a popular choice in the used car market today. Its reputation for reliability and fuel efficiency, combined with the inherent quality of the W212 E-Class, makes it an attractive option for buyers seeking a comfortable and economical executive sedan. The OM651 engine is known for its durability, and with proper maintenance, it can provide many years of reliable service. However, potential buyers should be aware of the potential for DPF issues and ensure that the car has been regularly serviced. The E 250 CDI BlueEFFICIENCY represents a significant chapter in Mercedes-Benz’s diesel engine development, showcasing the brand’s commitment to efficiency and refinement.
