The Mercedes-Benz CLS 350 CDI Grand Edition, produced from 2009 to 2010, represents a refined iteration of the C219 CLS-Class coupe. Positioned as a luxurious and efficient grand tourer, this variant combined a powerful diesel engine with a sophisticated automatic transmission. It was part of the facelifted C219 generation, introduced in 2008, which brought styling updates and technological enhancements to the original CLS formula. The “Grand Edition” designation signified a higher level of standard equipment and exclusive touches, appealing to buyers seeking a premium experience. This model played a significant role in establishing the four-door coupe segment, offering a compelling alternative to traditional sedans and coupes.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | CLS |
| Generation | CLS coupe (C219, facelift 2008) |
| Type (Engine) | CLS 350 CDI Grand Edition V6 (272 Hp) 7G-TRONIC |
| Start of production | 2009 |
| End of production | 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 4 |
| Fuel consumption (urban) | 11 l/100 km (21.4 US mpg, 25.7 UK mpg, 9.1 km/l) |
| Fuel consumption (extra urban) | 6.4 l/100 km (36.8 US mpg, 44.1 UK mpg, 15.6 km/l) |
| Fuel consumption (combined) | 8.1 l/100 km (29 US mpg, 34.9 UK mpg, 12.3 km/l) |
| CO2 emissions | 215 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6.5 sec |
| Acceleration 0 – 62 mph | 6.5 sec |
| Acceleration 0 – 60 mph | 6.2 sec |
| Maximum speed | 250 km/h (155.34 mph) – Electronically limited |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 6.4 kg/Hp, 156.3 Hp/tonne |
| Weight-to-torque ratio | 2.9 kg/Nm, 339.1 Nm/tonne |
| Power | 272 Hp @ 3800 rpm |
| Torque | 590 Nm @ 1600-2800 rpm (435.16 lb.-ft. @ 1600-2800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 642.920 |
| 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 | 17.7:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 8.5 l (8.98 US qt | 7.48 UK qt) |
| Kerb Weight | 1740 kg (3836.04 lbs.) |
| Max. weight | 2280 kg (5026.54 lbs.) |
| Max load | 540 kg (1190.5 lbs.) |
| Trunk (boot) space (minimum) | 505 l (17.83 cu. ft.) |
| Fuel tank capacity | 80 l (21.13 US gal | 17.6 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Length | 4917 mm (193.58 in.) |
| Width | 1807 mm (71.14 in.) |
| Width including mirrors | 2107 mm (82.95 in.) |
| Height | 1430 mm (56.3 in.) |
| Wheelbase | 2854 mm (112.36 in.) |
| Front overhang | 891 mm (35.08 in.) |
| Rear overhang | 1172 mm (46.14 in.) |
| Minimum turning circle | 11.21 m (36.78 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears | 7 |
| Gearbox type | Automatic transmission 7G-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 |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size (Front) | 245/40 R18 |
| Tires size (Rear) | 275/35 R18 |
| Wheel rims size (Front) | 8.5J x 18 |
| Wheel rims size (Rear) | 9.5J x 18 |
Powertrain & Engine Architecture
The heart of the CLS 350 CDI Grand Edition is the OM 642.920 3.0-liter V6 diesel engine. This engine, a mainstay of Mercedes-Benz’s diesel lineup, utilizes a common rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. The engine features a variable geometry turbocharger (VGT) and an intercooler, enhancing both power and efficiency. The V6 configuration provides inherent smoothness, while the DOHC (Double Overhead Camshaft) valvetrain ensures precise control of the intake and exhaust valves. The engine produces 272 horsepower at 3800 rpm and a substantial 590 Nm (435 lb-ft) of torque between 1600 and 2800 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 allows the engine to operate in its most efficient range, further enhancing fuel economy. The transmission also features a manual shift mode, allowing drivers to take more control over gear selection.
Driving Characteristics
The CLS 350 CDI Grand Edition delivers 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 maneuvers. While not as overtly sporty as some of its gasoline-powered siblings, the CLS 350 CDI offers a respectable 0-60 mph time of around 6.2 seconds. The 7G-TRONIC transmission contributes to smooth and seamless gear changes, enhancing the overall driving experience. Compared to the CLS 550 with its larger V8 engine, the 350 CDI prioritizes fuel efficiency and relaxed cruising over outright performance. The gear ratios are tuned for both acceleration and fuel economy, with a relatively tall final drive ratio contributing to lower engine speeds at highway speeds.
Equipment & Trim Levels
The “Grand Edition” trim level included a generous array of standard features. Interior appointments typically included leather upholstery, wood trim, and a premium sound system. Standard equipment also included automatic climate control, power-adjustable seats, and a multi-function steering wheel. Optional extras included features such as a panoramic sunroof, advanced navigation system, and upgraded audio options. The Grand Edition also featured unique exterior styling cues, such as special alloy wheels and chrome accents.
Chassis & Braking
The CLS 350 CDI Grand Edition utilizes an independent multi-link suspension system at both the front and rear axles. This suspension design provides a comfortable ride while maintaining good handling characteristics. Air suspension was available as an option, 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. Anti-lock brakes (ABS) are standard, enhancing safety and stability during emergency braking situations. Stabilizer bars are fitted to both axles to reduce body roll during cornering.
Market Reception & Comparison
The CLS 350 CDI Grand Edition was generally well-received by automotive critics. It was praised for its luxurious interior, comfortable ride, and impressive fuel economy. The diesel engine was noted for its strong torque output and refined operation. Compared to the gasoline-powered CLS 550, the 350 CDI offered a more economical alternative without sacrificing too much in terms of performance or luxury. However, some critics noted that the diesel engine lacked the responsiveness and sound of the V8. Fuel economy figures of around 29 US mpg combined were considered excellent for a vehicle of this size and class.
Legacy
The OM 642 engine family, including the OM 642.920 found in the CLS 350 CDI, has proven to be remarkably durable and reliable. With proper maintenance, these engines can accumulate high mileage without major issues. The 7G-TRONIC transmission is also generally considered to be a robust and reliable unit. In the used car market, the CLS 350 CDI Grand Edition remains a desirable option for buyers seeking a luxurious and efficient grand tourer. However, potential buyers should be aware of the potential maintenance costs associated with a diesel engine, such as diesel particulate filter (DPF) maintenance and potential injector issues. Overall, the CLS 350 CDI Grand Edition represents a well-engineered and refined vehicle that continues to offer a compelling ownership experience.
