The Mercedes-Benz E-Class Long (V214) E 300, introduced in December 2023, represents a significant evolution in the mid-size luxury sedan segment. Specifically designed for markets prioritizing rear passenger space, such as China, the “Long” wheelbase version offers enhanced comfort without sacrificing the driving dynamics expected from the E-Class lineage. This variant, powered by a 2.0-liter turbocharged inline-four engine coupled with a 48-volt mild hybrid system and a 9G-TRONIC automatic transmission, occupies a central position within the V214 range, balancing performance, efficiency, and luxury features. It serves as a key offering for buyers seeking a refined and technologically advanced executive sedan.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | E-Class |
| Generation | E-Class Long (V214) |
| Type | E 300 (258 Hp) Mild Hybrid 9G-TRONIC |
| Start of production | December, 2023 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (combined) | 6.65 l/100 km (35.4 US mpg, 42.5 UK mpg, 15 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.6 sec |
| Acceleration 0 – 62 mph | 6.6 sec |
| Acceleration 0 – 60 mph | 6.3 sec |
| Maximum speed | 245 km/h (152.24 mph) |
| Weight-to-power ratio | 7.4 kg/Hp |
| Weight-to-torque ratio | 4.8 kg/Nm |
| Battery voltage | 48 V |
| Battery technology | Lithium-ion (Li-Ion) |
| Electric motor power | 23 Hp |
| Electric motor Torque | 200 Nm (147.51 lb.-ft.) |
| Power | 258 Hp @ 5800 rpm |
| Torque | 400 Nm @ 2000-3200 rpm (295.02 lb.-ft. @ 2000-3200 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 254.920 |
| 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.) |
| 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) |
| Kerb Weight | 1920-1940 kg (4232.88 – 4276.97 lbs.) |
| Max. weight | 2520 kg (5555.65 lbs.) |
| Max load | 580-600 kg (1278.68 – 1322.77 lbs.) |
| Trunk (boot) space | 510 l (18.01 cu. ft.) |
| Fuel tank capacity | 66 l (17.44 US gal | 14.52 UK gal) |
| Length | 5092 mm (200.47 in.) |
| Width | 1880 mm (74.02 in.) |
| Height | 1493 mm (58.78 in.) |
| Wheelbase | 3094 mm (121.81 in.) |
| Front track | 1622 mm (63.86 in.) |
| Rear track | 1604 mm (63.15 in.) |
| Drag coefficient (Cd) | 0.23 |
| Number of gears | 9 |
| Gearbox type | Automatic transmission G-TRONIC |
Powertrain & Engine Architecture
At the heart of the E 300 Long lies the M 254.920 2.0-liter inline-four cylinder engine. This engine utilizes direct fuel injection and a twin-scroll turbocharger to deliver a balance of power and efficiency. The CAMTRONIC variable valve timing system further optimizes engine performance across a wide range of operating conditions. The integration of a 48-volt mild hybrid system adds a boost of up to 23 horsepower and 200 Nm of torque, assisting the engine during acceleration and enabling smoother start/stop functionality. This system contributes to improved fuel economy and reduced emissions. The 9G-TRONIC nine-speed automatic transmission is specifically calibrated for this powertrain, offering smooth and responsive gear changes. The transmission’s wide gear ratio spread allows for both relaxed cruising at highway speeds and quick acceleration when needed.
Driving Characteristics
The E 300 Long with the 9G-TRONIC transmission provides a comfortable and refined driving experience. While not as overtly sporty as some of its competitors or higher-trim E-Class variants, the 258 horsepower and 400 Nm of torque provide ample power for everyday driving and overtaking maneuvers. The mild hybrid system effectively fills in torque gaps, resulting in a more seamless power delivery. The 9G-TRONIC transmission is programmed for efficiency, often prioritizing higher gears to conserve fuel. Compared to a manual transmission equipped E-Class, the automatic offers greater convenience, particularly in urban environments. However, it may lack the direct engagement preferred by driving enthusiasts. The long wheelbase contributes to a stable and composed ride, especially on long journeys.
Equipment & Trim Levels
The E 300 Long typically comes standard with a comprehensive suite of luxury features, including Mercedes-Benz’s MBUX infotainment system with a large touchscreen display, premium upholstery (often leather or a high-quality synthetic alternative), and a panoramic sunroof. Standard safety features include automatic emergency braking, lane keeping assist, and adaptive cruise control. Optional extras often include advanced driver-assistance systems, upgraded audio systems (Burmester being a popular choice), and various interior trim options. The “Long” designation itself is a key feature, providing significantly more rear legroom than the standard wheelbase E-Class.
Chassis & Braking
The V214 E-Class utilizes a sophisticated chassis design featuring a multi-link suspension at both the front and rear. The suspension is tuned to prioritize ride comfort, but also provides good handling characteristics. Air suspension is available as an option, further enhancing ride quality and allowing for adjustable ride height. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. Standard safety features such as ABS (Anti-lock Braking System) and electronic stability control are included. Steering is provided by an electric power steering system, offering precise and responsive control.
Market Reception & Comparison
The E 300 Long has been well-received in markets where rear passenger space is highly valued. Critics have praised its comfortable ride, luxurious interior, and advanced technology. Compared to other trims in the E-Class lineup, the E 300 Long offers a compelling balance of performance and efficiency. While the E 450 4MATIC provides more power, it comes at a higher price point. The E 200 offers a more affordable entry point, but with less performance. Fuel economy is competitive within its class, and the mild hybrid system contributes to reduced emissions. Reliability is generally considered to be good, consistent with Mercedes-Benz’s reputation for build quality.
Legacy
The M 254 engine family, including the version found in the E 300 Long, is expected to be a mainstay in the Mercedes-Benz lineup for years to come. The combination of turbocharging, direct injection, and mild hybrid technology represents a significant step towards greater efficiency and reduced emissions. The 9G-TRONIC transmission has proven to be a reliable and smooth-shifting unit. As the V214 E-Class ages, the E 300 Long is likely to remain a popular choice in the used car market, offering a compelling combination of luxury, technology, and practicality. Its long wheelbase and comfortable ride will continue to appeal to buyers seeking a refined and spacious executive sedan.
