2024 Mercedes-Benz E-class All-Terrain (S214) E 450d (367 Hp) Mild Hybrid 4MATIC 9G-TRONIC

The Mercedes-Benz E-Class All-Terrain (S214) E 450d 4MATIC, introduced in 2024, represents the pinnacle of the fourth-generation E-Class All-Terrain lineup. Positioned as the flagship diesel variant, it combines luxurious appointments with enhanced all-weather capability, targeting buyers seeking a premium wagon with robust performance and practicality. This model builds upon the W214 E-Class platform, offering a raised ride height, standard 4MATIC all-wheel drive, and a sophisticated mild-hybrid system to enhance fuel efficiency and driving dynamics. It directly competes with vehicles like the Audi A6 allroad and Volvo V90 Cross Country.

Technical Specifications

INTRODUCTION

The S214 E-Class All-Terrain E 450d 4MATIC, launched in 2024, is a five-door station wagon designed to bridge the gap between a luxury sedan and a traditional SUV. Built on the W214 E-Class platform, it offers increased ground clearance and standard all-wheel drive, making it suitable for varied terrain and weather conditions. The E 450d variant, powered by a 3.0-liter inline-six diesel engine with mild-hybrid assistance, represents the top-performing diesel option in the All-Terrain range. It’s positioned as a premium offering, appealing to buyers who prioritize performance, efficiency, and a refined driving experience.

Powertrain & Engine Architecture

At the heart of the E 450d lies the OM 656.830, a 2.989-liter inline-six cylinder diesel engine. This engine utilizes a sophisticated diesel commonrail fuel injection system and a bi-turbocharger setup with an intercooler, delivering 367 horsepower at 4000 rpm and a substantial 750 Nm (553.17 lb-ft) of torque between 1350 and 2800 rpm. The engine features a compression ratio of 15.5:1 and a DOHC valvetrain with four valves per cylinder. Crucially, this engine incorporates a 48-volt mild-hybrid system. This system utilizes a 23 hp electric motor integrated between the engine and the 9G-TRONIC automatic transmission, providing assistance during acceleration and enabling features like coasting with the engine off to improve fuel economy. The 9G-TRONIC transmission itself is a nine-speed automatic, known for its smooth shifts and wide gear ratio spread, optimized for both performance and efficiency.

Driving Characteristics

The E 450d 4MATIC delivers a refined and powerful driving experience. The substantial torque output of the diesel engine, combined with the assistance of the mild-hybrid system, provides strong acceleration from low speeds. The 0-60 mph sprint is achieved in approximately 4.8 seconds, and the electronically limited top speed is 250 km/h (155.34 mph). The 9G-TRONIC transmission contributes to smooth and seamless gear changes, enhancing comfort during both city driving and highway cruising. Compared to lower-powered E-Class All-Terrain variants, the E 450d offers significantly more responsive acceleration and effortless overtaking capability. While not as sporty as some performance-focused wagons, the E 450d strikes a balance between performance and comfort, making it a capable and enjoyable vehicle to drive in a variety of conditions.

Equipment & Trim Levels

The E 450d 4MATIC All-Terrain comes standard with a high level of equipment. Interior features typically include premium leather upholstery, heated and ventilated front seats, a large touchscreen infotainment system with Mercedes-Benz’s MBUX interface, and a comprehensive suite of driver-assistance systems. Standard safety features include adaptive cruise control, lane-keeping assist, automatic emergency braking, and blind-spot monitoring. Optional extras can include features like a panoramic sunroof, a Burmester surround sound system, and advanced parking assistance features. The All-Terrain trim also adds unique exterior styling elements, such as rugged body cladding, increased ride height, and special wheel designs.

Chassis & Braking

The S214 E-Class All-Terrain utilizes an independent multi-link suspension system at both the front and rear, enhanced with air suspension for improved ride comfort and adjustability. The air suspension allows the driver to raise or lower the vehicle’s ride height, providing increased ground clearance for off-road driving or easier access for loading and unloading. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. ABS (Anti-lock Braking System) and electronic stability control are standard features, enhancing safety and control in various driving conditions. The steering system is a rack-and-pinion setup with electric power steering, offering precise and responsive handling.

Market Reception & Comparison

The E 450d 4MATIC All-Terrain has been generally well-received by automotive critics. Reviewers praise its powerful and efficient engine, comfortable ride, and spacious interior. The mild-hybrid system is noted for its contribution to improved fuel economy without compromising performance. Compared to other trims in the E-Class All-Terrain lineup, the E 450d offers a significant performance advantage, but at a higher price point. Its fuel economy, ranging from 6.2-6.9 l/100 km, is competitive for a vehicle of its size and performance, particularly considering its diesel powertrain. Compared to gasoline-powered alternatives, the E 450d typically offers better fuel efficiency and lower running costs.

Legacy

The OM 656 engine family, including the OM 656.830 found in the E 450d, has established a reputation for reliability and durability. The integration of mild-hybrid technology further enhances its long-term prospects by reducing stress on the engine and improving fuel efficiency. While it is still relatively early in its lifecycle, the S214 E-Class All-Terrain E 450d is expected to hold its value well in the used car market due to its premium features, strong performance, and reputation for quality. The combination of a powerful diesel engine, all-wheel drive, and a luxurious interior makes it a desirable option for buyers seeking a versatile and capable wagon.