2018-2020 Mercedes-Benz E-class Coupe (C238) E 300d (245 Hp) 9G-TRONIC

The Mercedes-Benz E-Class Coupe (C238) E 300d, produced from May 2018 to 2020, represents a compelling blend of luxury, performance, and efficiency within the E-Class range. Positioned as a mid-range offering in the Coupe lineup, it catered to buyers seeking a sophisticated grand tourer with a diesel powertrain. This variant utilized a 2.0-liter turbocharged diesel engine paired with a 9G-TRONIC automatic transmission, offering a balance between spirited driving and fuel economy. The C238 generation E-Class Coupe aimed to deliver a more dynamic and stylish alternative to the traditional E-Class sedan, appealing to a customer base prioritizing aesthetics and driving experience.

Technical Specifications

Powertrain & Engine Architecture

The heart of the E 300d Coupe is the OM 654.920, a 2.0-liter inline-four cylinder diesel engine. This engine is a member of Mercedes-Benz’s modular engine family, known for its advanced technology and efficiency. It features a two-stage turbocharging system, combining a small, variable geometry turbocharger for quick response at low engine speeds with a larger turbocharger for increased power at higher RPMs. The engine utilizes a common-rail direct fuel injection system, operating at extremely high pressures to optimize combustion and reduce emissions. The 9G-TRONIC nine-speed automatic transmission is integral to the powertrain’s efficiency and refinement. This transmission offers smooth and quick shifts, and its wide gear ratio spread allows the engine to operate within its optimal efficiency range more frequently. The transmission is electronically controlled and adapts to driving style and conditions.

Driving Characteristics

The E 300d Coupe, with its 245 horsepower and 368 lb-ft of torque, delivers a refined and capable driving experience. Acceleration from 0 to 60 mph takes approximately 6 seconds, making it a brisk performer. The 9G-TRONIC transmission contributes to smooth acceleration and minimizes turbo lag. Compared to higher-performance E-Class Coupe variants like the E 450, the E 300d prioritizes fuel efficiency and relaxed cruising. While it doesn’t offer the same outright speed, the abundant torque provides ample power for overtaking and highway driving. The gear ratios are tuned for both efficiency and responsiveness, offering a comfortable driving experience in most situations. Compared to a manual transmission equipped E-Class, the 9G-TRONIC provides a more seamless and effortless driving experience, particularly in urban environments.

Equipment & Trim Levels

The E 300d Coupe typically came well-equipped as standard. Features included leather upholstery, automatic climate control, a high-resolution infotainment system with navigation, and a suite of driver-assistance systems such as adaptive cruise control and lane-keeping assist. Optional extras included a panoramic sunroof, premium sound system, and various interior trim upgrades. The interior design emphasized luxury and modernity, with high-quality materials and a sleek dashboard layout. Trim levels often varied by market, but generally offered packages that added features like upgraded wheels, exterior styling enhancements, and more advanced driver-assistance technologies.

Chassis & Braking

The C238 E-Class Coupe features a sophisticated chassis designed to balance comfort and handling. It utilizes an independent multi-link suspension at both the front and rear, providing a smooth and controlled ride. The suspension is tuned to minimize body roll and provide precise steering response. Braking duties are handled by ventilated disc brakes on all four wheels, offering strong stopping power. Anti-lock braking system (ABS) and electronic stability control (ESC) are standard features, enhancing safety and stability. The E 300d Coupe’s weight distribution is well-balanced, contributing to its neutral handling characteristics.

Market Reception & Comparison

The E 300d Coupe was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and luxurious interior. Fuel economy was a significant selling point, particularly in Europe where diesel engines are more popular. Compared to the E 450 Coupe, the E 300d offered a more affordable entry point into the E-Class Coupe range, while still providing a premium driving experience. Some critics noted that the 2.0-liter diesel engine, while capable, lacked the outright performance of the larger gasoline engines available in the lineup. However, the E 300d’s combination of efficiency, refinement, and luxury made it a compelling choice for buyers prioritizing a comfortable and economical grand tourer.

Legacy

The OM 654 engine family, including the version used in the E 300d Coupe, has proven to be a reliable and durable powertrain. While long-term reliability data is still accumulating, early indications suggest that the engine is robust and capable of high mileage with proper maintenance. On the used car market, the E 300d Coupe represents a good value proposition, offering a luxurious and well-equipped vehicle at a competitive price. The 9G-TRONIC transmission has also proven to be generally reliable, although regular fluid changes are essential for maintaining its performance and longevity. The C238 E-Class Coupe, and specifically the E 300d variant, continues to be a desirable option for buyers seeking a stylish and efficient luxury coupe.