The Mercedes-Benz E 300d 4MATIC EQ Boost, part of the S213 E-Class T-modell (estate) facelift introduced in 2020, represents a sophisticated blend of diesel efficiency, mild-hybrid technology, and the practicality of a station wagon. Production spanned from 2021 to 2023, positioning this variant as a premium offering within the E-Class range. It aimed to appeal to buyers seeking a balance between performance, fuel economy, and all-weather capability. This model is a key example of Mercedes-Benz’s implementation of mild-hybrid systems to reduce emissions and enhance the driving experience.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | E-class |
| Generation | E-class T-modell (S213, facelift 2020) |
| Type (Engine) | E 300d (265 Hp) EQ Boost 4MATIC 9G-TRONIC |
| Start of production | 2021 |
| End of production | 2023 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 7.4-7.8 l/100 km (31.8 – 30.2 US mpg) |
| Fuel consumption (extra urban) | 4.6-4.9 l/100 km (51.1 – 48 US mpg) |
| Fuel consumption (combined) | 5.6-5.9 l/100 km (42 – 39.9 US mpg) |
| CO2 emissions | 147-156 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6.6 sec |
| Acceleration 0 – 62 mph | 6.6 sec |
| Acceleration 0 – 60 mph | 6.3 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6D-ISC-FCM |
| Weight-to-power ratio | 7.3 kg/Hp |
| Weight-to-torque ratio | 3.5 kg/Nm |
| Gross battery capacity | 0.9 kWh |
| Battery voltage | 48 V |
| Battery technology | Lithium-ion (Li-Ion) |
| Electric motor power | 20 Hp |
| Electric motor Torque | 200 Nm (147.51 lb.-ft.) |
| Engine Power | 265 Hp |
| Engine Torque | 550 Nm (405.66 lb.-ft.) |
| Engine Displacement | 1992 cm3 (121.56 cu. in.) |
| Number of cylinders | 4 |
| Engine Configuration | Inline |
| Fuel injection system | Diesel Commonrail |
| Engine Oil Capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Kerb Weight | 1935 kg (4265.94 lbs.) |
| Max. weight | 2690 kg (5930.43 lbs.) |
| Max load | 755 kg (1664.49 lbs.) |
| Trunk (boot) space – minimum | 640 l (22.6 cu. ft.) |
| Trunk (boot) space – maximum | 1820 l (64.27 cu. ft.) |
| Fuel tank capacity | 50 l (13.21 US gal | 11 UK gal) |
| Length | 4945 mm (194.69 in.) |
| Width | 1852 mm (72.91 in.) |
| Height | 1460 mm (57.48 in.) |
| Wheelbase | 2939 mm (115.71 in.) |
| Number of gears | 9 |
| Gearbox type | Automatic (9G-TRONIC) |
Powertrain & Engine Architecture
The heart of the E 300d 4MATIC EQ Boost is the OM 654.820 2.0-liter inline-four cylinder diesel engine. This engine utilizes a sophisticated diesel commonrail fuel injection system and a bi-turbocharger setup with an intercooler. The twin-turbo configuration helps to minimize turbo lag and deliver a broad torque curve. The engine produces 265 horsepower and a substantial 550 Nm (405.66 lb-ft) of torque. The “EQ Boost” component refers to a 48-volt mild-hybrid system. This system incorporates a 20 horsepower electric motor integrated between the engine and the 9G-TRONIC nine-speed automatic transmission. The electric motor provides assistance during acceleration, allowing for smoother starts and improved responsiveness. It also enables features like coasting with the engine switched off, further enhancing fuel efficiency. The 48V system also powers an electric water pump and other auxiliary systems, reducing the load on the engine.
Driving Characteristics
The E 300d 4MATIC EQ Boost offers a refined and comfortable driving experience. The 9G-TRONIC transmission is well-tuned, providing smooth and almost imperceptible gear changes. The EQ Boost system contributes to brisk acceleration, with a 0-60 mph time of around 6.3 seconds. While not a sports car, the E 300d delivers ample power for everyday driving and overtaking maneuvers. The 4MATIC all-wheel-drive system provides excellent traction in various weather conditions. Compared to the base E 220d, the E 300d offers significantly more power and a more responsive feel. It doesn’t quite match the performance of the E 450 models, but it provides a compelling balance of performance and efficiency. The mild-hybrid system is largely transparent to the driver, providing a subtle boost in power and improved fuel economy.
Equipment & Trim Levels
The E 300d 4MATIC EQ Boost typically came well-equipped as standard. Features included Mercedes-Benz’s MBUX infotainment system with a large touchscreen display, leather upholstery, automatic climate control, and a comprehensive suite of safety features such as adaptive cruise control, lane-keeping assist, and automatic emergency braking. Optional extras included a panoramic sunroof, premium sound system, head-up display, and various interior trim options. The Avantgarde, AMG Line, and Exclusive trim packages offered different styling cues and additional features, allowing buyers to customize their vehicle to their preferences.
Chassis & Braking
The E-Class T-modell utilizes a double-wishbone front suspension and an independent multi-link rear suspension, providing a comfortable and controlled ride. The suspension is tuned to prioritize comfort, but still offers good handling characteristics. The E 300d 4MATIC is equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The electronic stability program (ESP) and anti-lock braking system (ABS) are standard features, enhancing safety and control. The 4MATIC all-wheel-drive system distributes power between the front and rear axles as needed, optimizing traction and stability.
Market Reception & Comparison
The E 300d 4MATIC EQ Boost was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and advanced technology. The mild-hybrid system was seen as a positive step towards improving fuel efficiency and reducing emissions. Compared to other E-Class variants, the E 300d offered a compelling balance of performance and economy. It was often seen as a more sensible alternative to the more powerful (and more expensive) E 450 models. Fuel economy figures of around 42-39.9 US mpg combined were considered excellent for a vehicle of its size and class. Reliability reports have been generally positive, with the OM 654 engine proving to be a robust and dependable unit.
Legacy
The Mercedes-Benz E 300d 4MATIC EQ Boost represents an important step in the evolution of the E-Class. Its integration of mild-hybrid technology demonstrated Mercedes-Benz’s commitment to improving fuel efficiency and reducing emissions. On the used car market, these models hold their value well due to their reputation for reliability, comfort, and advanced features. The OM 654 engine is known for its longevity and relatively low maintenance costs. As a result, the E 300d 4MATIC EQ Boost remains a desirable option for buyers seeking a premium station wagon with a blend of performance, efficiency, and practicality.
