The Mercedes-Benz C 400 4MATIC, produced between 2014 and 2016, represented a significant step up in performance within the W205 C-Class range. Positioned as a mid-to-high-level trim, it bridged the gap between the more economical base models and the full-fledged AMG variants. This model combined a potent 3.0-liter V6 engine with Mercedes’ 4MATIC all-wheel-drive system and the 7G-TRONIC PLUS automatic transmission, offering a blend of luxury, performance, and all-weather capability. It was primarily marketed towards buyers seeking a sporty yet refined driving experience, and served as a key offering in the North American and European markets.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | C-class |
| Generation | C-class (W205) |
| Type | C 400 V6 (333 Hp) 4MATIC 7G-TRONIC PLUS |
| Start of production | 2014 |
| End of production | 2016 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 9.8-10.2 l/100 km (24 – 23.1 US mpg) |
| Fuel consumption (extra urban) | 5.8-6.3 l/100 km (40.6 – 37.3 US mpg) |
| Fuel consumption (combined) | 7.3-7.8 l/100 km (32.2 – 30.2 US mpg) |
| CO2 emissions | 170-181 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.2 sec |
| Acceleration 0 – 62 mph | 5.2 sec |
| Acceleration 0 – 60 mph | 4.9 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 4.7 kg/Hp |
| Weight-to-torque ratio | 3.3 kg/Nm |
| Power | 333 Hp @ 5250-6000 rpm |
| Torque | 480 Nm @ 1600-4000 rpm (354.03 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 276.823 |
| Engine displacement | 2996 cm3 (182.83 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 88 mm (3.46 in.) |
| Piston Stroke | 82.1 mm (3.23 in.) |
| Compression ratio | 10.7:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | BiTurbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant capacity | 10.9 l (11.52 US qt | 9.59 UK qt) |
| Kerb Weight | 1570 kg (3461.26 lbs.) |
| Max. weight | 2210 kg (4872.22 lbs.) |
| Max load | 640 kg (1410.96 lbs.) |
| Trunk (boot) space | 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 (braked) | 1800 kg (3968.32 lbs.) |
| Permitted trailer load (unbraked) | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 75 kg (165.35 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 track | 1570 mm (61.81 in.) |
| Drag coefficient (Cd) | 0.30 |
| Minimum turning circle | 11.22 m (36.81 ft.) |
| Front suspension | Coil spring, Independent multi-link, Transverse stabilizer |
| Rear suspension | Independent multi-link, Stabilizer |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Gearbox | 7 gears, automatic transmission G-TRONIC PLUS |
Powertrain & Engine Architecture
The heart of the C 400 4MATIC is the M276.823 3.0-liter V6 engine. This engine utilizes direct injection and is equipped with twin turbochargers, providing a significant boost in power and torque. The engine’s architecture features a 60-degree V-angle, contributing to a smoother power delivery and reduced vibrations. The 7G-TRONIC PLUS automatic transmission, a seven-speed unit, is known for its smooth and responsive shifts. It features a torque converter lock-up clutch that engages in most gears, improving fuel efficiency. The 4MATIC system is a full-time all-wheel-drive system, distributing power between the front and rear axles for enhanced traction and stability, particularly in adverse weather conditions.
Driving Characteristics
The C 400 4MATIC delivers a noticeably more engaging driving experience than the base C-Class models. The 333 horsepower and 354 lb-ft of torque provide brisk acceleration, with a 0-60 mph time of around 4.9 seconds. The 7G-TRONIC PLUS transmission is well-tuned, offering quick and seamless gear changes. The 4MATIC system provides excellent grip, inspiring confidence in corners and during acceleration. While not as overtly sporty as the AMG models, the C 400 strikes a good balance between comfort and performance. The gear ratios are optimized for both highway cruising and spirited driving, providing ample power throughout the rev range.
Equipment & Trim Levels
The C 400 4MATIC typically came standard with a generous array of features, including leather upholstery, dual-zone automatic climate control, a premium sound system, and a power-adjustable driver’s seat. Optional extras included a panoramic sunroof, a navigation system, advanced driver-assistance systems (such as blind-spot monitoring and lane-keeping assist), and upgraded interior trim options. The interior design was characterized by Mercedes’ signature luxury and attention to detail, with high-quality materials and a well-laid-out dashboard.
Chassis & Braking
The W205 C-Class featured a multi-link suspension system at both the front and rear, providing a comfortable ride and precise handling. The C 400 4MATIC typically came equipped with larger brakes than the base models, featuring ventilated discs on all four wheels. Anti-lock braking system (ABS) and electronic stability control (ESC) were standard features, enhancing safety and control. The suspension tuning was slightly firmer than the base models to complement the increased power output, resulting in reduced body roll during cornering.
Market Reception & Comparison
The C 400 4MATIC was generally well-received by automotive critics. It was praised for its powerful engine, smooth transmission, and all-weather capability. Compared to the C 300, the C 400 offered a significant performance upgrade, while remaining more affordable than the C 63 AMG. Fuel economy was respectable for a V6-powered vehicle, averaging around 32 mpg combined. However, some critics noted that the ride could be a bit firm on rough roads. Compared to its rivals, such as the BMW 535i and Audi A6 3.0T, the C 400 offered a compelling combination of luxury, performance, and value.
Legacy
The M276 engine family, including the version used in the C 400, has proven to be relatively reliable, although preventative maintenance is crucial. Common issues include oil leaks and occasional turbocharger problems. The 7G-TRONIC PLUS transmission is also generally reliable, but requires regular fluid changes. Today, the C 400 4MATIC represents a good value on the used car market, offering a luxurious and capable driving experience at a reasonable price. Its blend of performance, comfort, and all-wheel-drive capability continues to appeal to buyers seeking a well-rounded luxury sedan.
