The Mercedes-Benz E 400d 4MATIC, introduced as part of the W213 E-Class facelift in 2020 and continuing through the 2023 model year, represents a high-performance diesel offering within the E-Class range. Positioned as a premium variant, it catered to buyers seeking a blend of luxury, efficiency, and strong performance. This model combined a potent inline-six diesel engine with Mercedes-Benz’s sophisticated 4MATIC all-wheel-drive system and 9G-TRONIC nine-speed automatic transmission. It served as a flagship diesel option, slotting above the E 220d and E 300d in terms of power and price, and offering a compelling alternative to the gasoline-powered E 450.
| Brand | Mercedes-Benz |
| Model | E-Class |
| Generation | E-Class (W213, facelift 2020) |
| Type | E 400d (330 Hp) 4MATIC 9G-TRONIC |
| Start of production | 2020 |
| End of production | 2023 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 8.1-8.4 l/100 km (29-28 US mpg) |
| Fuel consumption (extra urban) | 4.9-5.2 l/100 km (48-45.2 US mpg) |
| Fuel consumption (combined) | 6.1-6.4 l/100 km (38.6-36.8 US mpg) |
| CO2 emissions | 161-168 g/km |
| Fuel Type | Diesel |
| 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 6d-ISC-FCM |
| Weight-to-power ratio | 5.6 kg/Hp |
| Weight-to-torque ratio | 2.6 kg/Nm |
| Power | 330 Hp @ 3600-4200 rpm |
| Torque | 700 Nm @ 1200-3200 rpm (516.29 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 656 D 29 SCR |
| Engine displacement | 2925 cm3 (178.49 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Compression ratio | 15.5:1 |
| Fuel injection system | Diesel Commonrail |
| Engine oil capacity | 7.5 l (7.93 US qt | 6.6 UK qt) |
| Kerb Weight | 1845 kg (4067.53 lbs.) |
| Max. weight | 2580 kg (5687.93 lbs.) |
| Max load | 735 kg (1620.4 lbs.) |
| Trunk (boot) space (minimum) | 540 l (19.07 cu. ft.) |
| Fuel tank capacity | 50 l (13.21 US gal | 11 UK gal) |
| Permitted trailer load (braked) | 2100 kg (4629.71 lbs.) |
| Permitted trailer load (unbraked) | 750 kg (1653.47 lbs.) |
| Length | 4935 mm (194.29 in.) |
| Width | 1852 mm (72.91 in.) |
| Width (including mirrors) | 2065 mm (81.3 in.) |
| Height | 1460 mm (57.48 in.) |
| Wheelbase | 2939 mm (115.71 in.) |
| Front track | 1604 mm (63.15 in.) |
| Rear track | 1608 mm (63.31 in.) |
| Gearbox | 9 gears, automatic transmission G-TRONIC |
Powertrain & Engine Architecture
The heart of the E 400d 4MATIC is the OM 656 D 29 SCR, a 2.9-liter inline-six diesel engine. This engine represented a significant advancement in Mercedes-Benz’s diesel technology, featuring a sophisticated commonrail direct injection system operating at pressures up to 2,700 bar. This high-pressure injection, combined with a two-stage turbocharging system (a small turbocharger for quick response and a larger turbocharger for peak power), contributed to the engine’s impressive torque output of 700 Nm (516 lb-ft) available from a low 1200 rpm. The engine also incorporated a close-coupled Diesel Particulate Filter (DPF) and Selective Catalytic Reduction (SCR) system to minimize emissions, meeting stringent Euro 6d-ISC-FCM standards. The 9G-TRONIC nine-speed automatic transmission was specifically calibrated to work with the engine’s characteristics, providing smooth and efficient gear changes. The transmission’s wide gear ratio spread allowed for both relaxed cruising at highway speeds and responsive acceleration.
Driving Characteristics
The E 400d 4MATIC delivered a distinctly refined driving experience. The high torque output of the diesel engine meant strong acceleration in virtually any gear, making overtaking effortless. The 0-60 mph time of around 4.7 seconds was comparable to many sports sedans. The 9G-TRONIC transmission contributed to a smooth and seamless power delivery, minimizing shift shock. The 4MATIC all-wheel-drive system provided excellent traction in all weather conditions, enhancing stability and confidence. Compared to the E 300d, the E 400d offered a noticeable increase in performance, while the ride quality remained comfortable and composed, typical of the E-Class. While not as overtly sporty as some of its gasoline-powered rivals, the E 400d provided a balanced and engaging driving experience.
Equipment & Trim Levels
The E 400d 4MATIC typically came well-equipped, reflecting its position as a premium model. Standard features often included leather upholstery, heated and ventilated front seats, a premium sound system, a large infotainment display with Mercedes-Benz’s MBUX system, and a comprehensive suite of driver-assistance technologies such as adaptive cruise control, lane-keeping assist, and automatic emergency braking. Optional extras included features like a panoramic sunroof, augmented reality navigation, and advanced interior lighting packages. Trim levels varied depending on the market, but generally offered choices in interior finishes, wheel designs, and exterior styling elements.
Chassis & Braking
The W213 E-Class chassis featured a multi-link independent suspension at both the front and rear, providing a comfortable ride and precise handling. The E 400d 4MATIC typically utilized larger brakes compared to lower-spec models, with ventilated discs on all four wheels, ensuring ample stopping power. The 4MATIC all-wheel-drive system employed a multi-plate clutch to distribute torque between the front and rear axles, optimizing traction and stability. The suspension was tuned to balance comfort and handling, providing a composed ride even on uneven surfaces.
Market Reception & Comparison
The E 400d 4MATIC was generally well-received by automotive critics. It was praised for its strong performance, refined driving experience, and fuel efficiency. The diesel engine’s torque output was a particular highlight, making it a capable and comfortable long-distance cruiser. Compared to the E 300d, the E 400d offered a significant performance upgrade, justifying its higher price tag for buyers prioritizing power. Fuel economy was competitive for its class, offering a good balance between performance and efficiency. However, some critics noted that the diesel engine’s sound was not as refined as that of some gasoline engines.
Legacy
The OM 656 engine family, as used in the E 400d, has proven to be a robust and reliable powertrain. While diesel engines have faced increasing scrutiny in recent years, the OM 656’s advanced emissions control systems have helped it meet stringent regulations. On the used car market, the E 400d 4MATIC holds its value well, appealing to buyers seeking a luxurious and efficient sedan with strong performance. Its combination of power, comfort, and all-weather capability continues to make it a desirable option for those looking for a premium diesel vehicle.
