The Mercedes-Benz CLS 350 CDI, specifically the facelifted C219 model produced from 2009 to 2010, represented a compelling blend of luxury, performance, and diesel efficiency within the four-door coupe segment. Positioned as a mid-range offering in the CLS lineup, it slotted between the more powerful CLS 550 and the entry-level CLS 320 CDI (in some markets). This variant combined a 3.0-liter turbocharged diesel V6 engine with Mercedes’ 7G-TRONIC seven-speed automatic transmission, appealing to buyers seeking a refined grand tourer with strong fuel economy. The C219 generation, introduced in 2004, pioneered the now-popular four-door coupe aesthetic, and the 2008 facelift brought updated styling, improved technology, and refined engine options.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | CLS |
| Generation | CLS coupe (C219, facelift 2008) |
| Type (Engine) | CLS 350 CDI V6 (224 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) | 10.6-11 l/100 km (22.2 – 21.4 US mpg) |
| Fuel consumption (extra urban) | 5.9-6.4 l/100 km (39.9 – 36.8 US mpg) |
| Fuel consumption (combined) | 7.6-8.1 l/100 km (30.9 – 29 US mpg) |
| CO2 emissions | 200-215 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 7 sec |
| Acceleration 0 – 62 mph | 7 sec |
| Acceleration 0 – 60 mph | 6.7 sec |
| Maximum speed | 246 km/h (152.86 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 7.8 kg/Hp |
| Weight-to-torque ratio | 3.2 kg/Nm |
| Power | 224 Hp @ 3800 rpm |
| Torque | 540 Nm @ 1600-2400 rpm (398.28 lb.-ft.) |
| 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) |
| Coolant capacity | 12.6 l (13.31 US qt | 11.09 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) |
| Length | 4917 mm (193.58 in.) |
| Width | 1873 mm (73.74 in.) |
| Width including mirrors | 2107 mm (82.95 in.) |
| Height | 1430 mm (56.3 in.) |
| Wheelbase | 2854 mm (112.36 in.) |
| Front track | 1593 mm (62.72 in.) |
| Rear track | 1603 mm (63.11 in.) |
| Front overhang | 891 mm (35.08 in.) |
| Rear overhang | 1172 mm (46.14 in.) |
| Minimum turning circle | 11.2 m (36.75 ft.) |
| Drivetrain | Rear wheel drive |
| Number of gears | 7 |
| Gearbox type | 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 | Hydraulic Steering |
| Tires size | 245/45 R17 |
| Wheel rims size | 8.5J x 17 |
Powertrain & Engine Architecture
The heart of the CLS 350 CDI is the OM 642.920 3.0-liter V6 diesel engine. This engine, a mainstay of Mercedes-Benz’s diesel offerings, features common-rail direct injection, a variable geometry turbocharger, and an intercooler. The common-rail system, operating at extremely high pressures, ensures precise fuel delivery for optimal combustion and reduced emissions. The V6 configuration provides inherent smoothness and balance, while the turbocharger significantly boosts power and torque. The engine produces 224 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 and contributes to effortless acceleration and strong in-gear performance. The 7G-TRONIC seven-speed automatic transmission is a crucial component, offering smooth and quick shifts. It features a torque converter lock-up clutch to improve efficiency and a manual shift mode for driver control.
Driving Characteristics
The CLS 350 CDI with the 7G-TRONIC transmission delivers a refined and comfortable driving experience. The abundant low-end torque makes overtaking easy and provides strong acceleration from a standstill. While not as overtly sporty as the CLS 550, the 350 CDI offers ample power for confident highway cruising and spirited driving. The 7G-TRONIC transmission is well-programmed, providing seamless gear changes and contributing to a relaxed driving experience. Compared to a manual transmission equipped CLS, the automatic prioritizes comfort and ease of use over outright driver engagement. The gear ratios are tuned for fuel efficiency and smooth acceleration, rather than maximizing performance. The automatic transmission does slightly diminish the feeling of control, but the overall driving experience remains luxurious and capable.
Equipment & Trim Levels
The CLS 350 CDI typically came well-equipped as standard. Interior features included leather upholstery, power-adjustable front seats with memory function, automatic climate control, and a premium audio system. Standard exterior features included alloy wheels, bi-xenon headlights, and a sunroof. Optional extras included a navigation system, upgraded leather, a rear-view camera, and advanced driver-assistance systems like Distronic adaptive cruise control. Trim levels were relatively limited, with most customization occurring through the selection of individual options. The interior typically featured wood trim accents and a sophisticated, understated design.
Chassis & Braking
The CLS 350 CDI utilizes an independent multi-link suspension system at both the front and rear axles, providing a comfortable ride and good handling characteristics. A transverse stabilizer bar helps to reduce body roll during cornering. The braking system consists of ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) is standard, enhancing safety and stability. The suspension tuning is geared towards comfort, prioritizing a smooth ride over aggressive handling. The steering is precise and well-weighted, providing a confident feel on the road.
Market Reception & Comparison
The CLS 350 CDI was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and luxurious interior. The diesel engine’s fuel economy was a significant selling point, particularly in Europe where diesel fuel is more common and often less expensive than gasoline. Compared to the CLS 550, the 350 CDI offered a more economical option without sacrificing too much in terms of luxury or performance. The CLS 320 CDI, when available, offered a slightly lower price point but with less power. Reliability was generally good, although diesel particulate filter (DPF) issues could occur with infrequent long-distance driving.
Legacy
The CLS 350 CDI, particularly the C219 facelift model, has proven to be a relatively durable and reliable vehicle. The OM 642 engine is known for its longevity when properly maintained. On the used car market, these models represent a good value for buyers seeking a luxurious and efficient grand tourer. However, potential buyers should be aware of the potential for DPF issues and the cost of maintaining a complex diesel engine. The CLS 350 CDI remains a stylish and capable vehicle, and its pioneering four-door coupe design continues to influence automotive styling today.
