The Mercedes-Benz E-Class Coupe (C207) E 350 CDI BlueEFFICIENCY, produced from April 2011 to March 2013, 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 occupied a space between the entry-level E 250 CDI and the more potent E 500 models, appealing to those prioritizing fuel economy and torque delivery over outright horsepower. It was a key model for Mercedes-Benz in Europe and other markets where diesel engines were highly favored, offering a compelling alternative to gasoline-powered coupes.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | E-Class |
| Generation | E-Class Coupe (C207) |
| Type | E 350 CDI BlueEFFICIENCY V6 (265 Hp) 7G-TRONIC PLUS |
| Start of production | April, 2011 |
| End of production | March, 2013 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 7.3-7.5 l/100 km (32.2 – 31.4 US mpg) |
| Fuel consumption (extra urban) | 4.9-5.2 l/100 km (48 – 45.2 US mpg) |
| Fuel consumption (combined) | 6-6.1 l/100 km (39.2 – 38.6 US mpg) |
| CO2 emissions | 159-162 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6.1 sec |
| Acceleration 0 – 62 mph | 6.1 sec |
| Acceleration 0 – 60 mph | 5.8 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 6.3 kg/Hp |
| Weight-to-torque ratio | 2.7 kg/Nm |
| Power | 265 Hp @ 3800 rpm |
| Torque | 620 Nm @ 1600-2400 rpm (457.29 lb.-ft. @ 1600-2400 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 642.838 |
| 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) |
| Coolant | 12.3 l (13 US qt | 10.82 UK qt) |
| Kerb Weight | 1660 kg (3659.67 lbs.) |
| Max. weight | 2205 kg (4861.19 lbs.) |
| Max load | 545 kg (1201.52 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) | 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 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 | 10.95 m (35.93 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears | 7 |
| Gearbox type | Automatic transmission G-TRONIC PLUS |
| 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 |
| Front tires | 235/45 R17; 235/40 R18; 235/35 R19 |
| Rear tires | 235/45 R17; 255/40 R17; 255/35 R18; 255/30 R19 |
Powertrain & Engine Architecture
The heart of the E 350 CDI BlueEFFICIENCY is the OM 642.838 3.0-liter V6 turbodiesel engine. This engine is a hallmark of Mercedes-Benz diesel technology, featuring a robust cast iron block and aluminum cylinder heads. It utilizes a common rail direct injection system, delivering fuel at extremely high pressures for optimized combustion and reduced emissions. The engine benefits from a variable geometry turbocharger (VGT) and an intercooler, enhancing both power and torque across a broad rev range. The 7G-TRONIC PLUS automatic transmission, a seven-speed unit, was specifically tuned to complement the engine’s characteristics, providing smooth and efficient gear changes. This transmission featured a torque converter lock-up clutch to minimize slippage and improve fuel economy. The engine also incorporated a particulate filter and a Start & Stop system to further reduce its environmental impact.
Driving Characteristics
The E 350 CDI BlueEFFICIENCY offered a distinctly different driving experience compared to its gasoline-powered siblings. While lacking the outright acceleration of the E 500, it delivered a substantial 620 Nm (457 lb-ft) of torque, available from a low 1600 rpm. This resulted in effortless cruising and strong mid-range acceleration, making it ideal for long-distance journeys. The 7G-TRONIC PLUS transmission contributed to a relaxed driving experience, with well-spaced gear ratios that kept the engine within its optimal power band. Compared to the manual transmission options available on other E-Class models, the automatic prioritized comfort and convenience over driver engagement. The rear-wheel drive configuration provided a balanced feel, although it wasn’t as sporty as the available 4MATIC all-wheel drive system.
Equipment & Trim Levels
The E 350 CDI BlueEFFICIENCY typically came well-equipped as standard. Features included leather upholstery, automatic climate control, a premium audio system, and a host of safety features such as ABS, ESP, and multiple airbags. Optional extras included a panoramic sunroof, adaptive cruise control, a navigation system, and upgraded interior trim options. The “BlueEFFICIENCY” designation indicated the inclusion of fuel-saving technologies like the Start & Stop system and optimized aerodynamics. Interior trim levels varied, with options ranging from wood veneers to aluminum accents, allowing buyers to personalize the cabin to their preferences.
Chassis & Braking
The C207 E-Class Coupe featured a sophisticated chassis design, utilizing a multi-link suspension system at both the front and rear. This setup provided a comfortable ride while maintaining good handling characteristics. The E 350 CDI, due to its weight, benefited from a slightly stiffer suspension setup compared to lighter models. Braking duties were handled by ventilated disc brakes on all four wheels, providing ample stopping power. The ABS (Anti-lock Braking System) and ESP (Electronic Stability Program) worked in conjunction to enhance safety and control, particularly in adverse weather conditions.
Market Reception & Comparison
The E 350 CDI BlueEFFICIENCY was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and excellent fuel economy. Compared to the E 250 CDI, it offered a significant performance upgrade, while remaining more economical than the E 500. However, some critics noted that the automatic transmission could feel slightly sluggish in certain situations. Its main competitors included the BMW 5 Series and Audi A5 Coupes, both of which offered comparable performance and luxury. The Mercedes-Benz held an edge in terms of diesel engine refinement and overall comfort.
Legacy
The OM 642 engine family, including the 3.0-liter V6 found in the E 350 CDI, has proven to be remarkably durable and reliable. Properly maintained examples continue to provide years of service. On the used car market, the C207 E 350 CDI BlueEFFICIENCY remains a desirable option for buyers seeking a luxurious and efficient coupe. While diesel emissions regulations have become stricter in recent years, these models are still valued for their long-distance comfort, strong torque, and relatively low running costs. Common maintenance items include regular oil changes, filter replacements, and occasional attention to the turbocharger and fuel injection system. Overall, the E 350 CDI BlueEFFICIENCY represents a well-engineered and enduring example of Mercedes-Benz’s commitment to diesel technology.
