The Mercedes-Benz E-Class W214 E 350, introduced in June 2024, represents the latest iteration of Mercedes-Benz’s mid-size executive car. This variant utilizes a 2.0-liter turbocharged inline-four cylinder engine coupled with a 48-volt mild hybrid system and a 9G-TRONIC nine-speed automatic transmission. Positioned as a mainstream offering within the W214 lineup, the E 350 aims to balance performance, efficiency, and technology, appealing to a broad range of buyers seeking a comfortable and refined driving experience. It serves as a key model in the North American market, where sedans continue to hold significant appeal despite the growing popularity of SUVs.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | E-Class |
| Generation | E-Class (W214) |
| Type | E 350 (255 Hp) Mild Hybrid 9G-TRONIC |
| Start of production | June, 2024 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 9.4 l/100 km (25 US mpg) |
| Fuel consumption (extra urban) | 7.1 l/100 km (33.1 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 60 mph | 6.1 sec |
| Maximum speed | 210 km/h (130.49 mph) |
| Emission standard | SULEV20 |
| Weight-to-power ratio | 7.4 kg/Hp |
| Weight-to-torque ratio | 4.7 kg/Nm |
| Battery voltage | 48 V |
| Battery technology | Lithium-ion (Li-Ion) |
| Electric motor power | 23 Hp |
| Electric motor Torque | 205 Nm (151.2 lb.-ft.) |
| Electric motor location | Between the combustion engine and the transmission |
| Power | 255 Hp @ 5800 rpm |
| Torque | 400 Nm @ 2000-3200 rpm (295.02 lb.-ft. @ 2000-3200 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 254 |
| Engine displacement | 1999 cm3 (121.99 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 92.4 mm (3.64 in.) |
| Compression ratio | 10:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-scroll turbo, Intercooler |
| Valvetrain | DOHC, CAMTRONIC |
| Engine oil capacity | 6 l (6.34 US qt | 5.28 UK qt) |
| Coolant capacity | 14 l (14.79 US qt | 12.32 UK qt) |
| Kerb Weight | 1875 kg (4133.67 lbs.) |
| Trunk (boot) space | 540 l (19.07 cu. ft.) |
| Fuel tank capacity | 66 l (17.44 US gal | 14.52 UK gal) |
| Length | 4949 mm (194.84 in.) |
| Width | 1880 mm (74.02 in.) |
| Width including mirrors | 2065 mm (81.3 in.) |
| Height | 1471 mm (57.91 in.) |
| Wheelbase | 2961 mm (116.57 in.) |
| Front track | 1628 mm (64.09 in.) |
| Rear track | 1643 mm (64.69 in.) |
| Front overhang | 848 mm (33.39 in.) |
| Rear overhang | 1140 mm (44.88 in.) |
| Minimum turning circle | 12 m (39.37 ft.) |
| Drivetrain | Rear wheel drive |
| Number of gears | 9 |
| Gearbox type | Automatic transmission G-TRONIC |
| Front suspension | Independent multi-link suspension, Transverse stabilizer, Air Suspension – Optional |
| Rear suspension | Independent multi-link suspension, Transverse stabilizer, Air Suspension – Optional |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 225/55 R18 |
| Wheel rims size | 8J x 18 |
INTRODUCTION
The W214 E 350, launched in 2024, builds upon the established reputation of the E-Class as a benchmark for mid-size luxury sedans. It represents the fifth generation of the E-Class, utilizing the updated MRA2 platform. The E 350 variant specifically is designed to offer a compelling blend of performance and efficiency, leveraging a 48-volt mild hybrid system to enhance fuel economy and responsiveness. This model is positioned as a volume seller, offering a more accessible entry point into the W214 range compared to the higher-performance AMG variants or the upcoming plug-in hybrid models.
Powertrain & Engine Architecture
At the heart of the E 350 lies the M 254 engine, a 2.0-liter inline-four cylinder gasoline engine. This engine benefits from direct fuel injection and a twin-scroll turbocharger, delivering 255 horsepower at 5800 rpm and 400 Nm (295 lb-ft) of torque between 2000 and 3200 rpm. The integration of a 48-volt mild hybrid system adds a 23 hp electric motor, providing a boost during acceleration and enabling features like coasting with the engine off. The 9G-TRONIC nine-speed automatic transmission is standard, offering smooth and efficient gear changes. This transmission is known for its wide gear ratio spread, contributing to both fuel economy and performance. The engine utilizes CAMTRONIC variable valve timing, optimizing engine performance across a wide range of operating conditions.
Driving Characteristics
The E 350 delivers a refined and comfortable driving experience. The mild hybrid system provides a noticeable boost in responsiveness, particularly during initial acceleration. While not as overtly sporty as some of its competitors or the higher-performance E-Class models, the E 350 offers ample power for everyday driving and highway cruising. The 9G-TRONIC transmission is generally smooth and unobtrusive, although some drivers may find it occasionally hesitant in certain situations. The rear-wheel drive configuration contributes to a balanced feel, while optional air suspension enhances ride comfort. Compared to a hypothetical six-cylinder E-Class, the E 350 offers a more fuel-efficient option, albeit with slightly less overall power and a different character.
Equipment & Trim Levels
The E 350 comes standard with a comprehensive suite of features, including Mercedes-Benz’s MBUX infotainment system with a large touchscreen display, premium upholstery, and a range of driver-assistance technologies. Standard features typically include LED headlights, automatic climate control, and a power-adjustable driver’s seat. Optional extras include a Burmester surround sound system, a panoramic sunroof, and advanced driver-assistance packages offering features like adaptive cruise control and lane-keeping assist. Interior trim options range from wood veneers to aluminum accents, allowing buyers to personalize the cabin to their preferences.
Chassis & Braking
The W214 E 350 utilizes an independent multi-link suspension at both the front and rear, providing a comfortable and controlled ride. Optional air suspension is available, further enhancing ride quality and allowing for adjustable ride height. The braking system consists of ventilated discs at all four corners, providing ample stopping power. Standard safety features include ABS (Anti-lock Braking System), electronic stability control, and a suite of airbags. The steering system is a rack-and-pinion setup with electric power assistance, offering precise and responsive steering feel.
Market Reception & Comparison
The E 350 has been generally well-received by automotive critics, who praise its comfortable ride, refined interior, and efficient powertrain. Compared to competitors like the BMW 5 Series and Audi A6, the E 350 is often lauded for its luxurious interior and advanced technology. Fuel economy figures are competitive within its class, and the mild hybrid system contributes to reduced emissions. However, some critics have noted that the E 350’s driving experience is not as engaging as some of its sportier rivals. Reliability is expected to be in line with other Mercedes-Benz models, with the M 254 engine having a generally good track record.
Legacy
The W214 E 350 represents a significant step forward in terms of technology and efficiency for the E-Class. The integration of a 48-volt mild hybrid system demonstrates Mercedes-Benz’s commitment to reducing emissions and improving fuel economy. The M 254 engine is expected to be a mainstay of the Mercedes-Benz lineup for years to come, and the 9G-TRONIC transmission is a proven performer. As the W214 E-Class ages, the E 350 variant is likely to become a popular choice in the used car market, offering a compelling combination of luxury, performance, and value.
