The Mercedes-Benz C 300 CDI BlueEFFICIENCY 4MATIC, produced from 2011 to 2014, represents a significant iteration of the W204 C-Class facelift. This variant combined a powerful diesel engine with all-wheel drive and a sophisticated automatic transmission, aiming to deliver a blend of performance, efficiency, and all-weather capability. Positioned as a mid-to-upper range offering within the C-Class lineup, it catered to buyers seeking a refined and capable executive sedan. It was a key model in the European market, where diesel engines held significant popularity, and also found a niche audience in North America.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | C-class |
| Generation | C-class (W204, facelift 2011) |
| Type | C 300 CDI BlueEFFICIENCY V6 (231 Hp) 4MATIC 7G-TRONIC PLUS |
| Start of production | 2011 |
| End of production | 2014 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 9.1-9.2 l/100 km (25.8 – 25.6 US mpg) |
| Fuel consumption (extra urban) | 5.9-6.1 l/100 km (39.9 – 38.6 US mpg) |
| Fuel consumption (combined) | 7-7.2 l/100 km (33.6 – 32.7 US mpg) |
| CO2 emissions | 185-189 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6.4 sec |
| Acceleration 0 – 60 mph | 6.1 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 7.2 kg/Hp |
| Weight-to-torque ratio | 3.1 kg/Nm |
| Power | 231 Hp @ 3800 rpm |
| Torque | 540 Nm @ 1600-2400 rpm (398.28 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 642.832 |
| 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 | 15.5:1 |
| 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) |
| Kerb Weight | 1660 kg (3659.67 lbs.) |
| Max. weight | 2250 kg (4960.4 lbs.) |
| Max load | 590 kg (1300.73 lbs.) |
| Trunk (boot) space | 475 l (16.77 cu. ft.) |
| Fuel tank capacity | 66 l (17.44 US gal | 14.52 UK gal) |
| Length | 4591 mm (180.75 in.) |
| Width | 1770 mm (69.69 in.) |
| Height | 1447 mm (56.97 in.) |
| Wheelbase | 2760 mm (108.66 in.) |
| Front track | 1549 mm (60.98 in.) |
| Rear track | 1552 mm (61.1 in.) |
| Gears/Transmission | 7 gears, automatic transmission G-TRONIC PLUS |
| Front suspension | Independent type McPherson, Transverse stabilizer |
| Rear suspension | Independent multi-link suspension, Transverse stabilizer |
| Front brakes | Ventilated discs, 322 mm |
| Rear brakes | Ventilated discs, 300 mm |
INTRODUCTION
The W204 C-Class, launched in 2007 and facelifted in 2011, represented Mercedes-Benz’s entry-level offering, competing with the BMW 3 Series and Audi A4. The C 300 CDI BlueEFFICIENCY 4MATIC, introduced with the facelift, aimed to provide a compelling alternative to gasoline-powered models, particularly in markets favoring diesel fuel. This variant was built on the 1HX0/A3 platform and offered a balance of luxury, performance, and fuel economy. The “BlueEFFICIENCY” designation signified Mercedes-Benz’s efforts to improve fuel efficiency through various technologies.
Powertrain & Engine Architecture
At the heart of the C 300 CDI 4MATIC lies the OM 642.832, a 3.0-liter V6 diesel engine. This engine is a robust and well-regarded design, known for its durability and strong torque output. It features a common rail direct injection system, delivering fuel at extremely high pressure for optimized combustion. The engine utilizes a variable geometry turbocharger (VGT) and an intercooler to enhance power and efficiency. The valvetrain employs double overhead camshafts (DOHC) with four valves per cylinder. The 7G-TRONIC PLUS automatic transmission, a seven-speed unit, was specifically tuned to complement the engine’s characteristics. This transmission offered smooth and responsive shifts, contributing to both performance and fuel economy. The 4MATIC all-wheel-drive system provides enhanced traction and stability, particularly in adverse weather conditions.
Driving Characteristics
The C 300 CDI 4MATIC delivered a distinctly different driving experience compared to its gasoline-powered siblings. While not as overtly sporty as the C 350, it offered ample power and a substantial 398 lb-ft of torque, available from a low 1600 rpm. This resulted in strong acceleration and effortless cruising. The 7G-TRONIC PLUS transmission was well-matched to the engine, providing smooth and timely gear changes. The all-wheel-drive system instilled confidence in various driving conditions, enhancing grip and stability. Compared to the manual transmission options available on other C-Class models, the automatic prioritized comfort and ease of use. While the manual offered a more engaging driving experience, the automatic was preferred by many buyers seeking a more relaxed and refined ride.
Equipment & Trim Levels
The C 300 CDI BlueEFFICIENCY 4MATIC typically came well-equipped as standard. Interior features included MB-Tex (artificial leather) upholstery, automatic climate control, a multi-function steering wheel, and a basic audio system. Optional extras were plentiful, including genuine leather upholstery, a premium sound system by Harman Kardon, a navigation system, parking sensors, and a sunroof. The trim level could vary depending on the market, but generally, it sat comfortably in the mid-range of the C-Class lineup, offering a good balance of features and price. The interior design followed the W204 facelift’s updated aesthetic, with improved materials and a more modern dashboard layout.
Chassis & Braking
The C 300 CDI 4MATIC utilized an independent suspension system at both the front (McPherson strut) and rear (multi-link). This setup provided a comfortable ride while maintaining good handling characteristics. Stabilizer bars were fitted to both axles to reduce body roll during cornering. The braking system consisted of ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) was standard, enhancing safety and control. The suspension was tuned to accommodate the added weight of the diesel engine and all-wheel-drive components, ensuring a balanced and predictable driving experience.
Market Reception & Comparison
The C 300 CDI BlueEFFICIENCY 4MATIC was generally well-received by automotive critics. It was praised for its strong performance, fuel efficiency, and comfortable ride. The all-wheel-drive system was also highlighted as a significant benefit, particularly in regions with inclement weather. Compared to the C 350, the C 300 CDI offered comparable performance with significantly better fuel economy. However, some critics noted that the diesel engine was slightly noisier than the gasoline alternatives. In terms of reliability, the OM 642 engine proved to be quite durable, although maintenance costs could be higher due to the complexity of the diesel injection system and particulate filter.
Legacy
The C 300 CDI BlueEFFICIENCY 4MATIC has proven to be a relatively reliable vehicle in the used car market. The OM 642 engine, when properly maintained, can accumulate high mileage without major issues. However, potential buyers should be aware of the maintenance requirements associated with diesel engines, including regular servicing of the fuel injection system and particulate filter. The 7G-TRONIC PLUS transmission is also generally reliable, but fluid changes should be performed according to the manufacturer’s recommendations. Today, these vehicles represent a good value proposition for buyers seeking a comfortable, capable, and fuel-efficient luxury sedan. The combination of a robust engine, all-wheel drive, and a refined interior has ensured its continued appeal in the used car market.
