The Mercedes-Benz E 300 de T-modell (S214), launched in 2023, represents the estate (wagon) variant of the fifth-generation E-Class, incorporating a plug-in hybrid diesel-electric powertrain. Positioned as a premium offering within the E-Class range, it caters to buyers seeking a blend of practicality, efficiency, and luxury. This model is part of the W214 series, building upon the success of its predecessors while introducing advanced technology and a refined driving experience. The “de” designation signifies its diesel-electric hybrid configuration, distinguishing it from petrol-electric hybrid and fully electric E-Class models.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | E-class |
| Generation | E-class T-modell (S214) |
| Type | E 300de (313 Hp) Plug-in Hybrid 4MATIC 9G-TRONIC |
| Start of production | 2023 |
| Powertrain Architecture | PHEV (Plug-in Hybrid Electric Vehicle) |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Combined fuel consumption (WLTP) | 0.6-0.8 l/100 km (392 – 294 US mpg, 470.8 – 353.1 UK mpg, 166.7 – 125 km/l) |
| CO2 emissions (WLTP) | 16-22 g/km |
| Fuel Type | Diesel / electricity |
| Acceleration 0 – 100 km/h | 6.7 sec |
| Acceleration 0 – 62 mph | 6.7 sec |
| Acceleration 0 – 60 mph | 6.4 sec |
| Maximum speed | 223 km/h (138.57 mph) |
| Emission standard | Euro 6d-ISC-FCM |
| Weight-to-power ratio | 7.4 kg/Hp, 135.8 Hp/tonne |
| Weight-to-torque ratio | 3.3 kg/Nm, 303.7 Nm/tonne |
| Gross battery capacity | 25.4 kWh |
| Battery technology | Lithium-ion (Li-Ion) |
| All-electric range (WLTP) | 82-99 km (50.95 – 61.52 mi) |
| Average Energy consumption (WLTP) | 22.4-24.9 kWh/100 km (36.05 – 40.07 kWh/100 mi, 93 – 84 MPGe, 4.5 – 4 km/kWh, 2.8 – 2.5 mi/kWh) |
| Max speed (electric) | 140 km/h (86.99 mph) |
| Electric motor power | 129 Hp |
| Electric motor Torque | 440 Nm (324.53 lb.-ft.) |
| Electric motor location | Between the combustion engine and the transmission |
| Electric motor type | Synchronous |
| System power | 313 Hp |
| System torque | 700 Nm (516.29 lb.-ft.) |
| Power | 197 Hp @ 3600 rpm |
| Torque | 440 Nm @ 1800-2800 rpm (324.53 lb.-ft. @ 1800-2800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 654 M |
| Engine displacement | 1993 cm3 (121.62 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 82 mm (3.23 in.) |
| Piston Stroke | 94.3 mm (3.71 in.) |
| Compression ratio | 15.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 6 l (6.34 US qt | 5.28 UK qt) |
| Kerb Weight | 2305 kg (5081.66 lbs.) |
| Max. weight | 2965 kg (6536.71 lbs.) |
| Max load | 660 kg (1455.05 lbs.) |
| Trunk (boot) space – minimum | 460 l (16.24 cu. ft.) |
| Trunk (boot) space – maximum | 1675 l (59.15 cu. ft.) |
| Fuel tank capacity | 50 l (13.21 US gal | 11 UK gal) |
| AdBlue tank | 24 l (6.34 US gal | 5.28 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (12%) | 2100 kg (4629.71 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 84 kg (185.19 lbs.) |
| Length | 4949 mm (194.84 in.) |
| Width | 1880 mm (74.02 in.) |
| Width including mirrors | 2065 mm (81.3 in.) |
| Height | 1469 mm (57.83 in.) |
| Wheelbase | 2961 mm (116.57 in.) |
| Front track | 1623 mm (63.9 in.) |
| Rear (Back) track | 1609 mm (63.35 in.) |
| Front overhang | 848 mm (33.39 in.) |
| Rear overhang | 1140 mm (44.88 in.) |
| Drag coefficient (Cd) | 0.26 |
| Minimum turning circle (turning diameter) | 12 m (39.37 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) and the electric motor permanently drive the four wheels of the car with the ability to work in full electric or mixed mode. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 9 gears, automatic transmission G-TRONIC |
| Front suspension | Independent multi-link suspension, Transverse stabilizer, Air Suspension – Optional |
| Rear suspension | Independent multi-link suspension, Air suspension, Transverse stabilizer |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | Front wheel tires: 245/40 R19 Rear wheel tires: 275/35 R19 |
| Wheel rims size | Front wheel rims: 8.5J x 19 Rear wheel rims: 9.5J x 19 |
Powertrain & Engine Architecture
The E 300 de utilizes a sophisticated plug-in hybrid system. The core of the powertrain is the OM 654 M 2.0-liter inline-four cylinder diesel engine, a highly advanced unit featuring a turbocharger, intercooler, and direct injection. This engine produces 197 horsepower at 3600 rpm and 440 Nm (324.53 lb-ft) of torque between 1800-2800 rpm. Integrated with this is a 129 horsepower electric motor, delivering an additional 440 Nm (324.53 lb-ft) of torque. The electric motor is strategically positioned between the engine and the 9G-TRONIC nine-speed automatic transmission. The combined system output reaches 313 horsepower and 700 Nm (516.29 lb-ft) of torque. The 25.4 kWh lithium-ion battery pack provides an all-electric range of 82-99 km (50.95 – 61.52 miles) according to WLTP standards. The 9G-TRONIC transmission is specifically calibrated to work seamlessly with the electric motor, optimizing efficiency and providing smooth gear changes.
Driving Characteristics
The E 300 de offers a remarkably refined driving experience. In electric mode, it provides near-silent operation and instant torque, making it ideal for urban commuting. Switching to hybrid mode allows the diesel engine to seamlessly engage when more power is needed, such as during highway overtaking or acceleration. The 9G-TRONIC transmission’s closely spaced gear ratios ensure the engine remains in its optimal power band. Compared to the petrol-powered E 300, the E 300 de prioritizes fuel efficiency and low-speed torque, rather than outright acceleration. While the 0-60 mph time of 6.4 seconds is respectable, it’s slightly slower than the petrol variant. The added weight of the battery pack is noticeable, but the sophisticated suspension system mitigates this, providing a comfortable and controlled ride.
Equipment & Trim Levels
The E 300 de T-modell typically comes well-equipped as standard. Features include Mercedes-Benz’s MBUX infotainment system with a large touchscreen display, digital instrument cluster, leather upholstery, automatic climate control, and a comprehensive suite of safety features like adaptive cruise control, lane keeping assist, and automatic emergency braking. Optional extras include air suspension, premium sound systems, panoramic sunroof, and advanced driver assistance packages. Interior trim options range from aluminum and wood veneers to carbon fiber accents, allowing for a degree of personalization.
Chassis & Braking
The E 300 de features a sophisticated chassis designed for comfort and handling. It utilizes an independent multi-link suspension system at both the front and rear, providing excellent ride quality and stability. Air suspension is available as an option, further enhancing ride comfort and allowing for adjustable ride height. Braking duties are handled by ventilated discs on all four wheels, providing ample stopping power. The anti-lock braking system (ABS) and electronic stability program (ESP) are standard features, ensuring safe and controlled braking in various conditions.
Market Reception & Comparison
The E 300 de has been generally well-received by automotive critics, praised for its fuel efficiency, refined driving experience, and spacious interior. Compared to other E-Class variants, the E 300 de appeals to buyers prioritizing economy and environmental consciousness. The diesel-electric hybrid powertrain offers significantly better fuel economy than the petrol engines, while the all-electric range allows for zero-emission driving on shorter journeys. However, the higher purchase price compared to the petrol models is a consideration. Compared to the E 350 e (petrol-electric hybrid), the E 300 de offers superior fuel economy and a longer electric range, but slightly less overall power.
Legacy
The OM 654 engine family, used in the E 300 de, has proven to be a reliable and durable unit. The plug-in hybrid system, while complex, has also demonstrated good long-term reliability. On the used car market, the E 300 de T-modell is expected to hold its value well due to its desirable combination of practicality, efficiency, and luxury. Regular maintenance, including battery health checks and adherence to Mercedes-Benz’s service intervals, will be crucial for ensuring the longevity of the powertrain. As environmental regulations become stricter, the demand for plug-in hybrid vehicles like the E 300 de is likely to increase, solidifying its position as a significant model in the E-Class lineage.
