2021-2023 Mercedes-Benz GLE Coupe (C167) GLE 300d (272 Hp) EQ Boost 4MATIC 9G-TRONIC

The Mercedes-Benz GLE 300d 4MATIC, produced from 2021 to 2023 as part of the C167 GLE Coupe generation, represents a compelling blend of diesel efficiency, mild-hybrid technology, and the luxurious appointments expected from the Mercedes-Benz brand. Positioned as a mid-range offering within the GLE Coupe lineup, it aimed to provide a balance between performance and economy for buyers seeking a sporty SUV with a focus on long-distance comfort. This variant utilizes a 2.0-liter turbocharged diesel engine augmented by a 48-volt EQ Boost mild-hybrid system, paired exclusively with a 9G-TRONIC automatic transmission and all-wheel drive.

Technical Specifications

INTRODUCTION

The Mercedes-Benz GLE 300d 4MATIC Coupe (C167) arrived in 2021 as a key component of the updated GLE range. Built on the MRA (Modular Rear-wheel-drive Architecture) platform, also underpinning models like the E-Class and S-Class, the C167 represented a significant step forward in terms of technology, refinement, and driving dynamics compared to its predecessor. The “300d” designation signifies the diesel engine variant, and the inclusion of “EQ Boost” highlights the implementation of a 48-volt mild-hybrid system designed to improve fuel efficiency and responsiveness. This model aimed to appeal to buyers who desired the style of a coupe-SUV with the practicality of a five-seater and the efficiency of a modern diesel powertrain.

Powertrain & Engine Architecture

At the heart of the GLE 300d lies the OM 654.820, a 2.0-liter inline-four cylinder diesel engine. This engine is a highly advanced design, featuring twin turbochargers (a conventional turbocharger and an exhaust gas turbocharger) and a commonrail direct injection system operating at extremely high pressures. This configuration allows for both strong low-end torque and impressive peak power. The engine produces 272 horsepower at 4200 rpm and a substantial 550 Nm (405.66 lb-ft) of torque between 1800 and 2200 rpm. The EQ Boost system adds a further 20 horsepower and 200 Nm (147.51 lb-ft) of torque temporarily, assisting during acceleration and smoothing out the engine’s operation. The 9G-TRONIC automatic transmission, a nine-speed unit, is specifically tuned to work in conjunction with the diesel engine and mild-hybrid system, offering smooth and efficient gear changes. The transmission’s wide gear ratio spread contributes to both fuel economy and responsive acceleration.

Driving Characteristics

The GLE 300d 4MATIC delivers a refined and comfortable driving experience. While not overtly sporty, the combination of the torquey diesel engine and the responsive 9G-TRONIC transmission provides ample performance for everyday driving and highway cruising. Acceleration from 0 to 60 mph takes approximately 6.5 seconds. The EQ Boost system is particularly noticeable during initial acceleration, providing a subtle but effective boost. Compared to higher-performance GLE variants like the GLE 450, the 300d prioritizes fuel efficiency and relaxed cruising. The 4MATIC all-wheel-drive system provides excellent traction in various weather conditions, enhancing stability and confidence. The steering is precise and well-weighted, although it lacks the ultimate feedback of a more focused sports SUV.

Equipment & Trim Levels

The GLE 300d 4MATIC Coupe came standard with a comprehensive array of features, including Mercedes-Benz’s MBUX infotainment system with a large touchscreen display, Apple CarPlay and Android Auto integration, leather upholstery, heated front seats, and a panoramic sunroof. Optional extras included advanced driver-assistance systems such as adaptive cruise control, lane-keeping assist, and a 360-degree camera. Premium packages added features like upgraded audio systems, ventilated seats, and more luxurious interior trim options. The interior design emphasized luxury and technology, with high-quality materials and a modern aesthetic.

Chassis & Braking

The GLE 300d 4MATIC utilizes a sophisticated suspension system designed to balance comfort and handling. Standard suspension consisted of steel springs and adaptive dampers. Optional air suspension, available as part of a package, provided an even more compliant ride and the ability to adjust the vehicle’s ride height. The braking system features ventilated discs on all four wheels, providing ample stopping power. Anti-lock braking system (ABS), electronic stability control (ESC), and a suite of other safety systems are standard.

Market Reception & Comparison

The GLE 300d 4MATIC Coupe was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and luxurious interior. Fuel economy was a particular strength, with combined WLTP figures ranging from 6.5 to 7.3 l/100 km (36.2 – 32.2 US mpg). Compared to the gasoline-powered GLE 450, the 300d offered superior fuel efficiency and a more relaxed driving experience, albeit with slightly less outright performance. The diesel engine’s higher torque output made it well-suited for towing. Some critics noted that the coupe-like roofline slightly compromised rear headroom compared to the standard GLE SUV.

Legacy

The OM 654 diesel engine family, used in the GLE 300d, has proven to be remarkably reliable. While diesel engines generally require diligent maintenance, including regular oil changes and AdBlue refills, the OM 654 has a reputation for longevity. On the used car market, the GLE 300d 4MATIC Coupe represents a compelling value proposition, offering a luxurious and efficient SUV at a more accessible price point than its higher-performance siblings. Its blend of comfort, technology, and fuel economy ensures its continued appeal to buyers seeking a versatile and refined SUV.