The Mercedes-Benz C 300 7G-TRONIC PLUS, produced from 2015 to 2016, represents a key iteration of the W205 C-Class, the fourth generation of Mercedes-Benz’s popular compact executive car. Positioned as a mid-range offering within the W205 lineup, it bridged the gap between the entry-level C 250 and the performance-oriented C 400/AMG C 43 models. This variant aimed to deliver a balance of performance, luxury, and efficiency, appealing to buyers seeking a refined driving experience without the higher price tag of the more powerful trims. The W205 C-Class as a whole marked a significant step forward for Mercedes-Benz, introducing a more sophisticated interior, improved technology, and a wider range of engine options compared to its predecessor.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | C-class |
| Generation | C-class (W205) |
| Type (Engine) | C 300 (245 Hp) 7G-TRONIC PLUS |
| Start of production | 2015 |
| End of production | 2016 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 8.8-8.2 l/100 km (26.7 – 28.7 US mpg, 32.1 – 34.4 UK mpg, 11.4 – 12.2 km/l) |
| Fuel consumption (extra urban) | 5.7-5.2 l/100 km (41.3 – 45.2 US mpg, 49.6 – 54.3 UK mpg, 17.5 – 19.2 km/l) |
| Fuel consumption (combined) | 6.8-6.3 l/100 km (34.6 – 37.3 US mpg, 41.5 – 44.8 UK mpg, 14.7 – 15.9 km/l) |
| CO2 emissions | 157-146 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.9 sec |
| Acceleration 0 – 62 mph | 5.9 sec |
| Acceleration 0 – 60 mph | 5.6 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 5.9 kg/Hp, 168.4 Hp/tonne |
| Weight-to-torque ratio | 3.9 kg/Nm, 254.3 Nm/tonne |
| Power | 245 Hp @ 5500 rpm |
| Torque | 370 Nm @ 1300-4000 rpm (272.9 lb.-ft. @ 1300-4000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 274.920 |
| Engine displacement | 1991 cm3 (121.5 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Compression ratio | 9.8:1 |
| Fuel injection system | Direct injection |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 7 l (7.4 US qt | 6.16 UK qt) |
| Coolant | 9 l (9.51 US qt | 7.92 UK qt) |
| Kerb Weight | 1455 kg (3207.73 lbs.) |
| Max. weight | 2095 kg (4618.68 lbs.) |
| Max load | 640 kg (1410.96 lbs.) |
| Trunk (boot) space – minimum | 480 l (16.95 cu. ft.) |
| Fuel tank capacity | 66 l (17.44 US gal | 14.52 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Permitted trailer load with brakes (12%) | 1800 kg (3968.32 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 4686 mm (184.49 in.) |
| Width | 1810 mm (71.26 in.) |
| Width including mirrors | 2020 mm (79.53 in.) |
| Height | 1442 mm (56.77 in.) |
| Wheelbase | 2840 mm (111.81 in.) |
| Front track | 1588 mm (62.52 in.) |
| Rear (Back) track | 1570 mm (61.81 in.) |
| Front overhang | 790 mm (31.1 in.) |
| Rear overhang | 1056 mm (41.57 in.) |
| Drag coefficient (Cd) | 0.30 |
| Minimum turning circle (turning diameter) | 11.22 m (36.81 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 7 gears, automatic transmission G-TRONIC PLUS |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 225/50 R17 |
| Wheel rims size | 17 |
Powertrain & Engine Architecture
The C 300 7G-TRONIC PLUS is powered by the M274.920 2.0-liter inline-four cylinder engine. This engine is a key member of Mercedes-Benz’s modular engine family, utilizing direct injection and a single twin-scroll turbocharger with an intercooler. The direct injection system, operating at pressures up to 200 bar, ensures precise fuel delivery for optimal combustion and efficiency. The engine’s aluminum block and head contribute to weight reduction. The 7G-TRONIC PLUS automatic transmission is a seven-speed torque converter automatic, known for its smooth shifting and efficiency. It features a wide gear ratio spread, allowing for both responsive acceleration and relaxed highway cruising. The transmission also incorporates a torque converter lock-up clutch to minimize slippage and improve fuel economy.
Driving Characteristics
The C 300 7G-TRONIC PLUS delivers a comfortable and refined driving experience. While not as overtly sporty as the C 400, it provides ample power for everyday driving and confident passing maneuvers. The 7G-TRONIC transmission is well-tuned, offering smooth and almost imperceptible gear changes. Compared to the six-speed manual transmission available on some C-Class models, the 7G-TRONIC prioritizes comfort and ease of use over outright driver engagement. The automatic transmission’s programming is geared towards fuel efficiency, with higher gears engaged quickly to reduce engine speed. The rear-wheel-drive configuration provides a balanced feel, although it doesn’t offer the all-weather capability of the 4MATIC all-wheel-drive system available on other C-Class variants.
Equipment & Trim Levels
The C 300 7G-TRONIC PLUS came standard with a generous array of features, including MB-Tex upholstery, automatic climate control, a 7-inch central display screen, Bluetooth connectivity, and a rearview camera. Optional extras included leather upholstery, a panoramic sunroof, a premium sound system, and a suite of advanced driver-assistance systems such as lane keeping assist and blind spot monitoring. The interior design emphasized luxury and modernity, with high-quality materials and a clean, uncluttered layout. The dashboard featured analog gauges with a central color display, and the steering wheel was wrapped in leather with integrated controls for audio and cruise control.
Chassis & Braking
The W205 C-Class utilizes a four-wheel independent suspension system, with multi-link setups at both the front and rear. This configuration provides a comfortable ride and precise handling. The C 300 typically featured slightly softer suspension tuning compared to the sportier C 400, prioritizing ride comfort over ultimate cornering performance. The braking system consisted of ventilated discs at the front and solid discs at the rear, providing adequate stopping power for everyday driving. Anti-lock brakes (ABS) and electronic stability control (ESC) were standard features, enhancing safety and control.
Market Reception & Comparison
The C 300 7G-TRONIC PLUS was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and luxurious interior. However, some reviewers noted that the 2.0-liter engine could feel slightly strained under hard acceleration, and that the rear-wheel-drive configuration wasn’t ideal for all weather conditions. Compared to the C 250, the C 300 offered a significant performance boost, while remaining more affordable than the C 400. Fuel economy was competitive within its class, and the 7G-TRONIC transmission contributed to a smooth and efficient driving experience.
Legacy
The M274 engine, while generally reliable, has been known to exhibit some issues with oil consumption and potential turbocharger wear over time. Regular maintenance, including oil changes and inspections, is crucial for ensuring long-term reliability. The 7G-TRONIC transmission is also generally robust, but may require fluid changes and occasional servicing. Today, the W205 C 300 represents a good value on the used car market, offering a blend of luxury, performance, and technology at a relatively affordable price point. Its sophisticated design and comfortable driving experience continue to appeal to buyers seeking a premium compact executive car.
