2023 Mercedes-Benz E-class All-Terrain (S214) E 300de (313 Hp) Plug-in Hybrid 4MATIC 9G-TRONIC

The Mercedes-Benz E-Class All-Terrain (S214) E 300de, introduced in September 2023, represents a compelling blend of luxury, practicality, and efficiency within the E-Class family. Positioned as a premium crossover-estate, it caters to buyers seeking a vehicle capable of both comfortable long-distance travel and moderate off-road capability. This particular variant, the E 300de, distinguishes itself through its plug-in hybrid powertrain, combining a diesel engine with an electric motor to deliver a substantial 313 horsepower and significant all-electric range. It sits within the All-Terrain lineup as a mid-to-high range offering, appealing to those prioritizing fuel economy and reduced emissions without sacrificing performance or luxury.

Technical Specifications

Powertrain & Engine Architecture

At the heart of the E 300de lies a 2.0-liter inline-four cylinder diesel engine, designated OM 654.820. This engine produces 197 horsepower at 3600 rpm and 440 Nm (324.53 lb.-ft.) of torque between 1800 and 2800 rpm. It features a turbocharger with an intercooler, direct injection, and a double overhead camshaft (DOHC) valvetrain. The diesel engine is paired with 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. This configuration allows for seamless transitions between electric, diesel, and combined power modes. The 25.4 kWh gross (19.53 kWh net) lithium-ion battery pack is located under the trunk floor, providing an all-electric range of 81-101 km (50.33 – 62.76 miles) according to WLTP standards. The system’s combined output reaches 313 horsepower and 700 Nm (516.29 lb.-ft.) of torque.

Driving Characteristics

The E 300de offers a refined and versatile driving experience. In electric mode, it provides near-silent operation and brisk acceleration for urban commutes. The electric motor’s instant torque contributes to responsive performance. When the diesel engine engages, the transition is generally smooth and unobtrusive. The 9G-TRONIC transmission is well-tuned, providing seamless gear changes and contributing to overall efficiency. While not as overtly sporty as some of its gasoline-powered siblings, the E 300de delivers ample power for highway cruising and overtaking maneuvers. The all-wheel-drive system (4MATIC) ensures confident traction in various weather conditions. Compared to the gasoline-powered E 300, the E 300de prioritizes fuel efficiency and low-speed torque, making it well-suited for drivers who value economy and a relaxed driving style.

Equipment & Trim Levels

The All-Terrain E 300de typically comes standard with a high level of equipment, reflecting its premium positioning. This includes features such as Mercedes-Benz’s MBUX infotainment system with a large touchscreen display, leather upholstery, heated front seats, a panoramic sunroof, and a suite of advanced driver-assistance systems (ADAS) like adaptive cruise control, lane-keeping assist, and automatic emergency braking. Specific trim levels may offer additional features such as upgraded audio systems, ventilated seats, and more luxurious interior trim options. The All-Terrain models also feature unique exterior styling elements, including rugged body cladding, increased ground clearance, and distinctive wheels.

Chassis & Braking

The E-Class All-Terrain utilizes an independent multi-link suspension at both the front and rear, enhanced with air suspension for a comfortable ride and adjustable ride height. This allows for increased ground clearance when navigating rough terrain. The E 300de is equipped with ventilated disc brakes on all four wheels, measuring 370 mm at the front and 360 mm at the rear, providing ample stopping power. The standard inclusion of ABS (Anti-lock Braking System) and electronic stability control further enhances safety. Stabilizer bars are fitted to both axles to minimize body roll during cornering.

Market Reception & Comparison

The E 300de has been generally well-received by automotive critics, praised for its fuel efficiency, comfortable ride, and refined powertrain. Its ability to operate in all-electric mode for a significant range is a major selling point, particularly in urban environments. Compared to other E-Class variants, such as the E 300 gasoline model, the E 300de offers superior fuel economy and lower emissions. However, it carries a higher price tag and its overall weight is greater due to the battery pack. Against competitors like the Volvo V90 Cross Country Recharge, the E 300de offers a similar blend of luxury, practicality, and plug-in hybrid technology, often with a slight edge in terms of overall refinement and brand prestige.

Legacy

The OM 654 diesel engine family, used in the E 300de, has proven to be a reliable and durable powerplant. While long-term reliability data for the plug-in hybrid system is still emerging, Mercedes-Benz has a strong track record in hybrid technology. The E 300de is expected to hold its value reasonably well in the used car market, particularly as demand for fuel-efficient and low-emission vehicles continues to grow. Its combination of luxury, practicality, and advanced technology positions it as a desirable option for buyers seeking a versatile and environmentally conscious vehicle.