Technical Specifications
| Brand | Mercedes-Benz |
| Model | E-class |
| Generation | E-class (W212) |
| Type (Engine) | E 220 CDI BlueEFFICIENCY (170 Hp) 5G-TRONIC |
| Start of production | 2009 |
| End of production | 2011 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 7.8-8 l/100 km (30.2 – 29.4 US mpg, 36.2 – 35.3 UK mpg, 12.8 – 12.5 km/l) |
| Fuel consumption (extra urban) | 4.4-4.7 l/100 km (53.5 – 50 US mpg, 64.2 – 60.1 UK mpg, 22.7 – 21.3 km/l) |
| Fuel consumption (combined) | 5.8-6 l/100 km (40.6 – 39.2 US mpg, 48.7 – 47.1 UK mpg, 17.2 – 16.7 km/l) |
| CO2 emissions | 154-169 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 8.8 sec |
| Acceleration 0 – 62 mph | 8.8 sec |
| Acceleration 0 – 60 mph | 8.4 sec |
| Maximum speed | 227 km/h (141.05 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 9.8 kg/Hp, 102.4 Hp/tonne |
| Weight-to-torque ratio | 4.2 kg/Nm, 241 Nm/tonne |
| Power | 170 Hp @ 3000-4200 rpm |
| Power per litre | 79.3 Hp/l |
| Torque | 400 Nm @ 1400-2800 rpm (295.02 lb.-ft. @ 1400-2800 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 | 2270 kg (5004.49 lbs.) |
| Max load | 610 kg (1344.82 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 | 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.) |
| Drag coefficient (Cd) | 0.25 |
| Minimum turning circle | 11.25 m (36.91 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears & gearbox type | 5 gears, automatic transmission G-TRONIC |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
The W212 E-Class, launched in 2009, represented a significant evolution for Mercedes-Benz’s mid-size executive sedan. The E 220 CDI BlueEFFICIENCY, a diesel-powered variant, was a cornerstone of the range, particularly in European markets. It offered a compelling blend of fuel efficiency, refinement, and practicality. The “BlueEFFICIENCY” designation indicated the inclusion of technologies aimed at reducing fuel consumption and emissions, aligning with increasingly stringent environmental regulations. This model was produced until 2011, being superseded by updated versions within the W212 lineup.
Powertrain & Engine Architecture
At the heart of the E 220 CDI BlueEFFICIENCY lay the OM 651.924, a 2.1-liter inline-four cylinder diesel engine. This engine was a product of extensive development by Mercedes-Benz, known for its durability and efficiency. It featured common-rail direct injection, delivering fuel at extremely high pressure for optimized combustion. Crucially, this engine employed a bi-turbocharger system – a small turbocharger for immediate response at low engine speeds, coupled with a larger turbocharger for increased power at higher RPMs. An intercooler further enhanced performance by cooling the compressed intake air. The engine produced 170 horsepower at 3000-4200 rpm and a substantial 400 Nm (295 lb-ft) of torque between 1400 and 2800 rpm. The transmission was a 5G-TRONIC automatic, a five-speed torque converter automatic known for its smooth shifts and reliability. This transmission was specifically tuned to complement the engine’s torque characteristics, prioritizing fuel economy and comfortable cruising.
Driving Characteristics
The E 220 CDI BlueEFFICIENCY offered a relaxed and refined driving experience. While not a performance-oriented model, the 400 Nm of torque provided ample power for everyday driving and overtaking maneuvers. The 5G-TRONIC transmission contributed to smooth acceleration, although it lacked the responsiveness of more modern transmissions with a greater number of gears. The gear ratios were optimized for fuel efficiency, meaning the engine didn’t rev as high as some competitors. Compared to the more powerful E 350 models, the E 220 CDI felt less urgent, but it excelled in providing a comfortable and economical ride. Against other diesel variants like the E 300 CDI, it offered a more accessible price point and lower running costs, albeit with slightly less performance.
Equipment & Trim Levels
The E 220 CDI BlueEFFICIENCY typically came well-equipped, reflecting its position as a premium executive car. Standard features included automatic climate control, a multi-function steering wheel, power-adjustable front seats, and a high-quality audio system. Interior upholstery was generally a combination of fabric and Artico (Mercedes’ synthetic leather). Optional extras included leather upholstery, a sunroof, navigation system, parking sensors, and advanced driver-assistance systems like Distronic Plus (adaptive cruise control). Trim levels varied depending on the market, but generally offered packages that bundled popular options together.
Chassis & Braking
The W212 E-Class featured a sophisticated chassis design. The E 220 CDI utilized an independent multi-link suspension at both the front and rear, providing a comfortable ride and good handling characteristics. The front brakes were ventilated discs, while the rear brakes were solid discs. Anti-lock Braking System (ABS) and Electronic Stability Program (ESP) were standard safety features. The suspension was tuned to prioritize comfort, but still offered a reasonable level of control in corners. Stabilizer bars were fitted front and rear to reduce body roll.
Market Reception & Comparison
The E 220 CDI BlueEFFICIENCY was generally well-received by automotive critics. It was praised for its fuel efficiency, comfortable ride, and refined engine. However, some reviewers noted that the 5G-TRONIC transmission felt dated compared to newer automatic gearboxes. Compared to its competitors, such as the BMW 520d and Audi A6 2.0 TDI, the E 220 CDI offered a similar level of performance and refinement, but often boasted slightly better fuel economy. Its reliability was generally considered good, although diesel particulate filter (DPF) maintenance was a consideration for owners who primarily drove short distances.
Legacy
The OM 651 engine family, including the 2.1-liter variant found in the E 220 CDI, proved to be remarkably durable and reliable. These engines are known to withstand high mileage with proper maintenance. In the used car market, the W212 E 220 CDI BlueEFFICIENCY remains a popular choice for buyers seeking a comfortable, economical, and well-built executive car. However, potential buyers should be aware of the potential for DPF issues and the cost of maintaining a complex diesel engine. The E 220 CDI BlueEFFICIENCY represents a significant chapter in Mercedes-Benz’s diesel engine development, showcasing their commitment to efficiency and refinement.
