The Mercedes-Benz E-Class Coupe (C207) E 350 CDI BlueEFFICIENCY, produced from May 2009 to April 2011, represented a sophisticated blend of performance and efficiency within the broader C207 coupe range. Positioned as a mid-to-upper tier offering, it catered to buyers seeking a luxurious grand tourer with strong diesel power and the convenience of an automatic transmission. This variant utilized Mercedes-Benz’s advanced BlueEFFICIENCY technologies to optimize fuel economy without sacrificing the driving experience expected of the E-Class. It was a key model in the lineup, bridging the gap between the more accessible four-cylinder models and the higher-performance E 500 and E 63 AMG coupes.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | E-class |
| Generation | E-class Coupe (C207) |
| Type (Engine) | E 350 CDI BlueEFFICIENCY V6 (231 Hp) 7G-TRONIC |
| Start of production | May, 2009 |
| End of production | April, 2011 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (economy) – urban (NEDC) | 8.9 l/100 km (26.4 US mpg, 31.7 UK mpg, 11.2 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 5.6 l/100 km (42 US mpg, 50.4 UK mpg, 17.9 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 6.8 l/100 km (34.6 US mpg, 41.5 UK mpg, 14.7 km/l) |
| CO2 emissions (NEDC) | 179 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6.7 sec |
| Acceleration 0 – 62 mph | 6.7 sec |
| Acceleration 0 – 60 mph | 6.4 sec |
| Maximum speed | 250 km/h (155.34 mph), Electronically limited |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 7.2 kg/Hp, 139.6 Hp/tonne |
| Weight-to-torque ratio | 3.1 kg/Nm, 326.3 Nm/tonne |
| Power | 231 Hp @ 3800 rpm |
| Torque | 540 Nm @ 1600-2400 rpm (398.28 lb.-ft. @ 1600-2400 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 642.836 |
| Engine displacement | 2987 cm3 (182.28 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 92 mm (3.62 in.) |
| Compression ratio | 15.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Kerb Weight | 1655 kg (3648.65 lbs.) |
| Max. weight | 2180 kg (4806.08 lbs.) |
| Max load | 525 kg (1157.43 lbs.) |
| Trunk (boot) space – minimum | 450 l (15.89 cu. ft.) |
| Fuel tank capacity | 66 l (17.44 US gal | 14.52 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (12%) | 1800 kg (3968.32 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 75 kg (165.35 lbs.) |
| Length | 4698 mm (184.96 in.) |
| Width | 1786 mm (70.31 in.) |
| Width including mirrors | 2015 mm (79.33 in.) |
| Height | 1397 mm (55 in.) |
| Wheelbase | 2760 mm (108.66 in.) |
| Front track | 1538 mm (60.55 in.) |
| Rear (Back) track | 1544 mm (60.79 in.) |
| Front overhang | 855 mm (33.66 in.) |
| Rear overhang | 1083 mm (42.64 in.) |
| Drag coefficient (Cd) | 0.27 |
| Minimum turning circle (turning diameter) | 10.95 m (35.93 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 7 gears, automatic transmission G-TRONIC |
| Front suspension | Coil spring, Independent multi-link suspension, Transverse stabilizer |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| Front brakes | Ventilated discs, 322 mm |
| Rear brakes | Ventilated discs, 300 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | Front wheel tires: 235/45 R17; 235/40 R18; 235/35 R19Rear wheel tires: 235/45 R17; 255/40 R17; 255/35 R18; 255/30 R19 |
| Wheel rims size | Front wheel rims: 7.5J x 17; 8J x 18; 8J x 19; 8.5J x 19Rear wheel rims: 7.5J x 17; 8.5J x 17; 8.5J x 18; 8.5J x 19 |
INTRODUCTION
The C207 E-Class Coupe, launched in 2009, represented a departure from the previous CLK-Class coupe, adopting the E-Class nomenclature and a more sophisticated design language. The E 350 CDI BlueEFFICIENCY variant, powered by a 3.0-liter turbocharged diesel V6, was a significant offering for European markets, where diesel engines held a substantial market share. It aimed to provide a luxurious and comfortable driving experience with respectable performance and excellent fuel economy. This model was built on the W204 E-Class sedan platform (1HX0/A3), but with a unique coupe body style and revised suspension tuning.
Powertrain & Engine Architecture
At the heart of the E 350 CDI BlueEFFICIENCY lies the OM 642.836 3.0-liter V6 diesel engine. This engine is a common-rail direct injection diesel, meaning fuel is injected directly into the cylinders at extremely high pressure for optimized combustion. The engine utilizes a variable geometry turbocharger (VGT) and an intercooler to boost power and efficiency. The DOHC (Double Overhead Camshaft) valvetrain, with four valves per cylinder, further enhances breathing and performance. The engine produces 231 horsepower at 3800 rpm and a substantial 540 Nm (398 lb-ft) of torque between 1600 and 2400 rpm. This broad torque curve is a hallmark of diesel engines, providing strong pulling power across a wide range of engine speeds.
The engine is mated to Mercedes-Benz’s 7G-TRONIC seven-speed automatic transmission. This transmission is known for its smooth and responsive shifts, contributing to a refined driving experience. The 7G-TRONIC features a torque converter lock-up clutch that engages at higher speeds to improve fuel efficiency. The transmission also offers a manual shift mode, allowing drivers to select gears for more control, although it’s primarily geared towards comfort and ease of use.
Driving Characteristics
The E 350 CDI BlueEFFICIENCY offers a compelling blend of performance and comfort. The high torque output of the diesel engine provides effortless acceleration, making it well-suited for highway cruising and overtaking. While not as overtly sporty as some of its gasoline-powered siblings, the E 350 CDI delivers a 0-60 mph time of around 6.4 seconds, which is respectable for a luxury coupe. The 7G-TRONIC transmission contributes to a smooth and seamless driving experience, with well-chosen gear ratios that keep the engine in its optimal power band. Compared to the E 350 gasoline variant, the CDI offers superior fuel economy and a more relaxed driving style, but with slightly less outright acceleration. Compared to the E 500, the CDI provides a more economical option with a focus on torque rather than peak horsepower.
Equipment & Trim Levels
The E 350 CDI BlueEFFICIENCY came standard with a generous array of features, befitting its position in the E-Class lineup. Standard equipment typically included leather upholstery, automatic climate control, a premium audio system, power-adjustable front seats, and a sunroof. Safety features were also comprehensive, including ABS, traction control, stability control, and multiple airbags. Optional extras included features like a navigation system, a rear-view camera, parking sensors, and upgraded leather options. The interior design was characterized by Mercedes-Benz’s signature blend of luxury and sophistication, with high-quality materials and a well-crafted dashboard layout.
Chassis & Braking
The C207 E-Class Coupe featured a sophisticated chassis design aimed at providing a comfortable and controlled ride. The front suspension utilized a multi-link setup with coil springs and a transverse stabilizer bar, while the rear suspension employed an independent multi-link spring suspension with a stabilizer bar. This configuration helped to minimize body roll and provide precise handling. Braking duties were handled by ventilated discs on all four wheels, providing ample stopping power. ABS (Anti-lock Braking System) was standard, enhancing safety and control during emergency braking situations.
Market Reception & Comparison
The E 350 CDI BlueEFFICIENCY was generally well-received by automotive critics. It was praised for its refined driving experience, strong fuel economy, and luxurious interior. Critics noted that the diesel engine provided ample power for most driving situations, and the 7G-TRONIC transmission contributed to a smooth and seamless driving experience. Compared to the gasoline-powered E 350 Coupe, the CDI offered significantly better fuel economy, making it a more practical choice for drivers who covered long distances. However, some critics noted that the diesel engine was slightly noisier than the gasoline engine. In terms of reliability, the OM 642 engine family is generally considered to be robust and durable, although regular maintenance is essential.
Legacy
The E 350 CDI BlueEFFICIENCY remains a desirable used car today, particularly for those seeking a luxurious and fuel-efficient coupe. The OM 642 diesel engine is known for its longevity and relatively low maintenance costs, provided it is properly maintained. While diesel emissions regulations have become stricter in recent years, the C207 E 350 CDI BlueEFFICIENCY continues to offer a compelling combination of performance, comfort, and economy. Its status as a well-built and refined grand tourer ensures its continued appeal in the used car market.
