The Mercedes-Benz C 400 4MATIC, produced between 2016 and 2018, represented a significant step up in performance within the W205 C-Class range. Positioned as a mid-to-high-tier offering, it bridged the gap between the more economical base models and the full-fledged AMG variants. This variant combined a potent 3.0-liter V6 engine with Mercedes-Benz’s 4MATIC all-wheel-drive system and the sophisticated 9G-TRONIC nine-speed automatic transmission, aiming to deliver a blend of luxury, performance, and all-weather capability. It was primarily marketed towards buyers seeking a refined driving experience with ample power for both daily commutes and spirited driving.
| Brand | Mercedes-Benz |
| Model | C-class |
| Generation | C-class (W205) |
| Type | C 400 V6 (333 Hp) 4MATIC 9G-TRONIC |
| Start of production | 2016 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 10.6-10.9 l/100 km (22.2 – 21.6 US mpg) |
| Fuel consumption (extra urban) | 5.8-6.2 l/100 km (40.6 – 37.9 US mpg) |
| Fuel consumption (combined) | 7.6-8 l/100 km (30.9 – 29.4 US mpg) |
| CO2 emissions | 172-181 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.9 sec |
| Acceleration 0 – 60 mph | 4.7 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.) |
| 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.) |
| Number of gears | 9 |
| Gearbox type | Automatic transmission G-TRONIC |
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 M276 engine family is known for its robust construction and relatively high thermal efficiency. The 9G-TRONIC nine-speed automatic transmission, paired with the engine, is a key component of the C 400’s efficiency and performance. This transmission offers a wide range of gear ratios, allowing the engine to operate in its optimal power band more frequently. 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 compared to the base C300 models. The 333 horsepower and 354 lb-ft of torque provide brisk acceleration, with 0-60 mph times consistently around 4.7-4.9 seconds. The 9G-TRONIC transmission shifts smoothly and responsively, although some drivers noted a slight hesitation in certain situations. The all-wheel-drive system provides excellent grip and stability, inspiring confidence in various driving conditions. Compared to the C 43 AMG, the C 400 offers a more comfortable and refined ride, prioritizing luxury over outright performance. The gear ratios are tuned for a balance between acceleration and fuel economy, making it a suitable choice for both highway cruising and city driving.
Equipment & Trim Levels
The C 400 4MATIC typically came well-equipped with standard features such as leather upholstery, a premium sound system, dual-zone automatic climate control, and a power-adjustable driver’s seat. Optional extras included a panoramic sunroof, 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-Benz’s signature blend of luxury and technology, with high-quality materials and a user-friendly infotainment system. The dashboard layout was clean and modern, with a central display screen and intuitive controls.
Chassis & Braking
The W205 C-Class chassis features a four-wheel independent suspension system. The C 400 4MATIC typically utilized a multi-link suspension setup at both the front and rear, providing a comfortable ride and precise handling. Many models were also equipped with optional air suspension, which further enhanced ride quality and allowed for adjustable ride height. The braking system consisted of ventilated discs on all four wheels, providing ample stopping power. Anti-lock brakes (ABS) and electronic stability control (ESC) were standard features, enhancing safety and control. The C 400 4MATIC’s suspension was tuned to balance comfort and handling, offering a more dynamic driving experience than the base C-Class models.
Market Reception & Comparison
The C 400 4MATIC was generally well-received by automotive critics, who praised its powerful engine, refined ride, and all-weather capability. It was often seen as a compelling alternative to its rivals, such as the BMW 5 Series and Audi A6. Fuel economy was respectable for a V6-powered vehicle, averaging around 29-31 mpg on the highway. However, some critics noted that the C 400’s price was relatively high compared to other mid-size luxury sedans. Compared to the C 300, the C 400 offered a significant performance upgrade, while the C 43 AMG provided even more power and a sportier driving experience. The C 400 struck a balance between these two extremes, appealing to buyers who wanted a blend of luxury and performance.
Legacy
The M276 engine family, including the version used in the C 400 4MATIC, has proven to be relatively reliable, although preventative maintenance is crucial. Common issues include potential oil leaks and occasional problems with the turbochargers. The 9G-TRONIC transmission is generally robust, but some owners have reported occasional software glitches. Today, the C 400 4MATIC remains a desirable used car, offering a compelling combination of performance, luxury, and technology. Its all-wheel-drive system and relatively low mileage make it a popular choice for buyers in regions with harsh winters. The C 400 represents a sweet spot in the W205 C-Class lineup, offering a significant upgrade in performance without the higher price tag and more aggressive tuning of the AMG models.
