The Mercedes-Benz E-Class Cabriolet (A238) E 450 4MATIC, produced from September 2018 to May 2019, represents a sophisticated blend of luxury, performance, and open-air driving enjoyment. Positioned as a high-end variant within the A238 generation, it offered a significant step up in power and refinement compared to the base E-Class Cabriolet models. This model occupied the premium segment of the lineup, appealing to buyers seeking a powerful and well-equipped convertible experience. It builds upon the success of previous E-Class convertibles, continuing a tradition of elegant open-top motoring from Mercedes-Benz.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | E-class |
| Generation | E-class Cabrio (A238) |
| Type (Engine) | E 450 V6 (367 Hp) 4MATIC 9G-TRONIC |
| Start of production | September, 2018 |
| End of production | May, 2019 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (economy) – urban (NEDC) | 12.2-12.3 l/100 km (19.3 – 19.1 US mpg, 23.2 – 23 UK mpg, 8.2 – 8.1 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 6.6-6.8 l/100 km (35.6 – 34.6 US mpg, 42.8 – 41.5 UK mpg, 15.2 – 14.7 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 8.7-8.9 l/100 km (27 – 26.4 US mpg, 32.5 – 31.7 UK mpg, 11.5 – 11.2 km/l) |
| CO2 emissions (NEDC) | 198-202 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.8 sec |
| Acceleration 0 – 62 mph | 5.8 sec |
| Acceleration 0 – 60 mph | 5.5 sec |
| Maximum speed | 250 km/h (155.34 mph), Electronically limited |
| Emission standard | Euro 6d-TEMP |
| Weight-to-power ratio | 5.1 kg/Hp, 195.7 Hp/tonne |
| Weight-to-torque ratio | 3.8 kg/Nm, 266.7 Nm/tonne |
| Power | 367 Hp @ 5500-6000 rpm |
| Power per litre | 122.5 Hp/l |
| Torque | 500 Nm @ 1800-4500 rpm (368.78 lb.-ft. @ 1800-4500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 276.823 |
| Engine displacement | 2996 cm3 (182.83 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 88 mm (3.46 in.) |
| Piston Stroke | 82.1 mm (3.23 in.) |
| Compression ratio | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | BiTurbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Kerb Weight | 1875 kg (4133.67 lbs.) |
| Max. weight | 2420 kg (5335.19 lbs.) |
| Max load | 545 kg (1201.52 lbs.) |
| Trunk (boot) space – minimum | 310 l (10.95 cu. ft.) |
| Trunk (boot) space – maximum | 385 l (13.6 cu. ft.) |
| Fuel tank capacity | 66 l (17.44 US gal | 14.52 UK gal) |
| Permitted trailer load with brakes (12%) | 1800 kg (3968.32 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 4846 mm (190.79 in.) |
| Width | 1860 mm (73.23 in.) |
| Width including mirrors | 2065 mm (81.3 in.) |
| Height | 1429 mm (56.26 in.) |
| Wheelbase | 2873 mm (113.11 in.) |
| Front track | 1599 mm (62.95 in.) |
| Rear (Back) track | 1591 mm (62.64 in.) |
| Front overhang | 853 mm (33.58 in.) |
| Rear overhang | 1120 mm (44.09 in.) |
| Minimum turning circle (turning diameter) | 11.61 m (38.09 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives permanently the four wheels of the vehicle. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 9 gears, automatic transmission G-TRONIC |
| Front suspension | Independent multi-link suspension, Transverse stabilizer |
| Rear suspension | Independent multi-link suspension, Transverse stabilizer |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | Front wheel tires: 245/45 R18; 245/40 R19; 245/35 R20Rear wheel tires: 245/45 R18; 275/40 R18; 275/35 R19; 275/30 R20 |
| Wheel rims size | Front wheel rims: 8J x 18; 8J x 19; 8J x 20Rear wheel rims: 8J x 18; 9J x 18; 9J x 19; 9J x 20 |
Powertrain & Engine Architecture
The E 450 4MATIC Cabriolet is powered by Mercedes-Benz’s M276.823 3.0-liter V6 engine. This engine utilizes direct injection and is equipped with twin turbochargers, resulting in a potent 367 horsepower and 500 Nm (368 lb-ft) of torque. The engine’s architecture features a 60-degree V-angle, contributing to a smooth and balanced operation. The engine employs a DOHC (Dual Overhead Camshaft) valvetrain with four valves per cylinder, optimizing airflow for enhanced performance. The 9G-TRONIC nine-speed automatic transmission is standard, providing smooth and efficient gear changes. This transmission is known for its wide gear ratio spread, contributing to both fuel economy and responsive acceleration. The 4MATIC all-wheel-drive system ensures optimal traction in various driving conditions, distributing power between the front and rear axles as needed.
Driving Characteristics
The E 450 4MATIC Cabriolet delivers a refined and engaging driving experience. The combination of the powerful V6 engine and the nine-speed automatic transmission results in brisk acceleration – 0 to 60 mph in approximately 5.5 seconds. The 9G-TRONIC transmission is programmed for comfort, with seamless shifts, but also offers responsive downshifts when needed for overtaking or spirited driving. Compared to the base E-Class Cabriolet models with smaller engines, the E 450 provides significantly more power and torque, resulting in a more effortless and confident driving experience. While not as overtly sporty as some performance-focused convertibles, the E 450 strikes a good balance between comfort and performance. The all-wheel-drive system enhances stability and grip, particularly in inclement weather.
Equipment & Trim Levels
The E 450 4MATIC Cabriolet came generously equipped as standard. Typical features included leather upholstery, heated and ventilated front seats, a premium sound system, and a large infotainment display with navigation. Mercedes-Benz’s COMAND system controlled the infotainment functions, offering a user-friendly interface. Optional extras included features like a head-up display, advanced driver-assistance systems (such as adaptive cruise control and lane-keeping assist), and upgraded interior trim options. The Cabriolet also featured a fully automatic fabric soft top, which could be raised or lowered in around 20 seconds at speeds up to 31 mph.
Chassis & Braking
The A238 E-Class Cabriolet utilizes a sophisticated chassis design with an independent multi-link suspension at both the front and rear. This suspension setup provides a comfortable ride while maintaining good handling characteristics. A transverse stabilizer bar is fitted to both axles to reduce body roll during cornering. The E 450 4MATIC is equipped with ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) and electronic stability control (ESC) are standard safety features. The steering system is a rack-and-pinion type with electric power assistance, offering precise and responsive steering feel.
Market Reception & Comparison
The E 450 4MATIC Cabriolet was generally well-received by automotive critics. Reviewers praised its powerful engine, comfortable ride, and luxurious interior. The 9G-TRONIC transmission was also lauded for its smoothness and efficiency. Compared to other premium convertibles in its class, such as the BMW 4 Series Convertible and the Audi A5 Cabriolet, the E 450 offered a compelling combination of performance, luxury, and technology. Fuel economy was respectable for a vehicle of its size and performance, averaging around 27 mpg combined. Reliability reports have been generally positive, with few major issues reported.
Legacy
The M276 engine family, including the version used in the E 450 Cabriolet, has proven to be a reliable and durable powertrain. While some early models experienced minor issues with the timing chain tensioner, these were addressed with updated parts. Today, well-maintained E 450 Cabriolets continue to offer a luxurious and enjoyable driving experience. The A238 generation E-Class Cabriolet represents a high point in Mercedes-Benz’s convertible heritage, combining elegant styling with modern technology and performance. On the used car market, these models hold their value well, appealing to buyers seeking a premium open-top experience.
