The Mercedes-Benz C 300h BlueTEC Hybrid, produced between 2014 and 2018, was a variant of the S205 C-Class T-modell (station wagon). Positioned as a premium, fuel-efficient option within the C-Class range, it combined a diesel engine with an electric motor to deliver a blend of performance and economy. This model represented Mercedes-Benz’s early foray into more widespread diesel-electric hybrid technology, aimed at meeting increasingly stringent European emissions standards while still providing the driving experience expected of a Mercedes-Benz. It was built on the W205 platform, sharing its underpinnings with the C-Class sedan but offering the added practicality of a wagon body style.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | C-class |
| Generation | C-class T-modell (S205) |
| Type (Engine) | C 300h (231 Hp) BlueTEC Hybrid 7G-TRONIC PLUS |
| Start of production | 2014 |
| End of production | 2018 |
| Powertrain Architecture | FHEV (Full Hybrid Electric Vehicle) |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (economy) – urban (NEDC) | 4-4.2 l/100 km (58.8 – 56 US mpg, 70.6 – 67.3 UK mpg, 25 – 23.8 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 3.7-4.4 l/100 km (63.6 – 53.5 US mpg, 76.3 – 64.2 UK mpg, 27 – 22.7 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 3.8-4.2 l/100 km (61.9 – 56 US mpg, 74.3 – 67.3 UK mpg, 26.3 – 23.8 km/l) |
| CO2 emissions (NEDC) | 99-108 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6.7 sec |
| Acceleration 0 – 62 mph | 6.7 sec |
| Acceleration 0 – 60 mph | 6.4 sec |
| Maximum speed | 238 km/h (147.89 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 7.3 kg/Hp, 136.7 Hp/tonne |
| Weight-to-torque ratio | 3.4 kg/Nm, 295.9 Nm/tonne |
| Gross battery capacity | 0.8 kWh |
| Battery technology | Lithium-ion (Li-Ion) |
| Battery location | Under the front hood |
| Max speed (electric) | 35 km/h (21.75 mph) |
| Electric motor power | 27 Hp @ 800 rpm |
| Electric motor Torque | 250 Nm (184.39 lb.-ft.) |
| Electric motor location | Between the combustion engine and the transmission |
| System power | 231 Hp |
| Power | 204 Hp @ 3800 rpm |
| Power per litre | 95.2 Hp/l |
| Torque | 500 Nm @ 1600-1800 rpm (368.78 lb.-ft. @ 1600-1800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 651.921 |
| 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 | Twin-Turbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 6 l (6.34 US qt | 5.28 UK qt) |
| Coolant | 11 l (11.62 US qt | 9.68 UK qt) |
| Kerb Weight | 1690 kg (3725.81 lbs.) |
| Max. weight | 2340 kg (5158.82 lbs.) |
| Max load | 650 kg (1433 lbs.) |
| Trunk (boot) space – minimum | 435 l (15.36 cu. ft.) |
| Fuel tank capacity | 50 l (13.21 US gal | 11 UK gal) |
| AdBlue tank | 25 l (6.6 US gal | 5.5 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Permitted trailer load with brakes (12%) | 1600 kg (3527.4 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 75 kg (165.35 lbs.) |
| Length | 4702 mm (185.12 in.) |
| Width | 1810 mm (71.26 in.) |
| Width including mirrors | 2020 mm (79.53 in.) |
| Height | 1457 mm (57.36 in.) |
| Wheelbase | 2840 mm (111.81 in.) |
| Front track | 1584 mm (62.36 in.) |
| Rear (Back) track | 1566 mm (61.65 in.) |
| Front overhang | 790 mm (31.1 in.) |
| Rear overhang | 1072 mm (42.2 in.) |
| Minimum turning circle (turning diameter) | 11.22 m (36.81 ft.) |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Gearbox | 7 gears, automatic transmission G-TRONIC PLUS |
Powertrain & Engine Architecture
The C 300h BlueTEC Hybrid utilized the OM 651.921 2.1-liter four-cylinder diesel engine, a mainstay in the Mercedes-Benz lineup. This engine, known for its robust construction and efficiency, produced 204 horsepower at 3800 rpm and a substantial 500 Nm (368.78 lb.-ft.) of torque between 1600 and 1800 rpm. It featured a twin-turbocharger setup with an intercooler, enhancing both power and responsiveness. The engine employed a diesel commonrail direct injection system for precise fuel delivery and optimized combustion. A key element of the hybrid system was the 27 hp electric motor, integrated between the engine and the 7G-TRONIC PLUS seven-speed automatic transmission. The 0.8 kWh lithium-ion battery, located under the front hood, provided energy for the electric motor, enabling electric-only driving at low speeds and assisting the diesel engine during acceleration. The hybrid system allowed for regenerative braking, capturing energy during deceleration to recharge the battery.
Driving Characteristics
The C 300h BlueTEC Hybrid offered a refined and comfortable driving experience. The combination of the diesel engine and electric motor resulted in smooth and quiet acceleration. While not as overtly sporty as some of the higher-powered C-Class variants, the 231 hp system output provided adequate performance for everyday driving and highway cruising, achieving 0-60 mph in approximately 6.4 seconds. The 7G-TRONIC PLUS transmission offered seamless gear changes, contributing to the overall smoothness. The electric motor provided instant torque, filling in gaps in the diesel engine’s power delivery. Fuel economy was a significant strength, with combined figures ranging from 3.8 to 4.2 l/100 km (61.9 – 56 US mpg), making it one of the most fuel-efficient options in the C-Class range. The hybrid system’s ability to operate in electric-only mode at low speeds further enhanced fuel efficiency in urban environments.
Equipment & Trim Levels
The C 300h BlueTEC Hybrid typically came well-equipped, reflecting its premium positioning. Standard features often included automatic climate control, a high-resolution infotainment system with navigation, leather upholstery, and a suite of safety features such as adaptive brake assist, collision prevention assist, and attention assist. Optional extras included a panoramic sunroof, upgraded sound systems, and various driver assistance packages. Interior trim levels varied, with options for different wood or aluminum finishes. The wagon body style itself provided a generous amount of cargo space, making it a practical choice for families or those needing to transport larger items.
Chassis & Braking
The S205 C-Class T-modell featured a sophisticated chassis design. The front suspension utilized a multi-link setup with a transverse stabilizer, while the rear employed an independent multi-link suspension, also with a stabilizer bar. This configuration provided a good balance between ride comfort and handling. The C 300h Hybrid was equipped with ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) and electronic stability control were standard safety features. The suspension tuning was generally geared towards comfort, but the car still offered reasonably precise steering and predictable handling.
Market Reception & Comparison
The C 300h BlueTEC Hybrid was generally well-received by critics, who praised its fuel efficiency, smooth ride, and refined interior. However, some reviewers noted that its performance wasn’t as exhilarating as that of the more powerful C-Class models, such as the C 350 or AMG variants. Compared to the C 220d, the C 300h offered a more refined driving experience and significantly better fuel economy, but at a higher price point. Against the C 350, it traded outright performance for efficiency. The hybrid system added complexity, potentially increasing maintenance costs compared to the simpler diesel-only models. However, the C 300h appealed to buyers prioritizing fuel economy and environmental consciousness.
Legacy
The C 300h BlueTEC Hybrid represents an important step in Mercedes-Benz’s development of hybrid technology. While later models would feature more advanced hybrid systems, the C 300h demonstrated the potential for combining diesel engines with electric motors to achieve significant fuel savings. On the used car market, these models are generally considered reliable, although the hybrid components require careful inspection. The OM 651 diesel engine is known for its durability, but the hybrid system’s battery and electric motor should be checked for proper function. The C 300h BlueTEC Hybrid remains a compelling option for buyers seeking a fuel-efficient and comfortable station wagon with a touch of luxury.
