The Mercedes-Benz CLS 350 BlueTEC 4MATIC, produced between March 2013 and September 2014, represents a compelling blend of luxury, performance, and efficiency within the C218 CLS coupe generation. Positioned as a mid-range offering in the CLS lineup, it catered to buyers seeking a sophisticated four-door coupe experience with the added benefits of all-wheel drive and a diesel powertrain. This variant aimed to bridge the gap between the more accessible CLS 300 and the higher-performance CLS 550 models, offering a unique proposition in the premium coupe segment.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | CLS |
| Generation | CLS coupe (C218) |
| Type (Engine) | CLS 350 BlueTEC V6 (248 Hp) 4MATIC G-TRONIC |
| Start of production | March, 2013 |
| End of production | September, 2014 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 4 |
| Fuel consumption (urban) | 7.4-7.3 l/100 km (31.8 – 32.2 US mpg) |
| Fuel consumption (extra urban) | 5.5-5.3 l/100 km (42.8 – 44.4 US mpg) |
| Fuel consumption (combined) | 6.2-6.1 l/100 km (37.9 – 38.6 US mpg) |
| CO2 emissions | 164-160 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) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 7.8 kg/Hp, 128.2 Hp/tonne |
| Weight-to-torque ratio | 3.1 kg/Nm, 320.4 Nm/tonne |
| Power | 248 Hp @ 3600 rpm |
| Torque | 620 Nm @ 1600-2400 rpm (457.29 lb.-ft. @ 1600-2400 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 642.858 |
| Engine displacement | 2987 cm3 (182.28 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Compression ratio | 15.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Coolant | 10.8 l (11.41 US qt | 9.5 UK qt) |
| Kerb Weight | 1935 kg (4265.94 lbs.) |
| Max. weight | 2420 kg (5335.19 lbs.) |
| Max load | 485 kg (1069.24 lbs.) |
| Trunk (boot) space – minimum | 520 l (18.36 cu. ft.) |
| Fuel tank capacity | 59 l (15.59 US gal | 12.98 UK gal) |
| Length | 4940 mm (194.49 in.) |
| Width | 1881 mm (74.06 in.) |
| Height | 1416 mm (55.75 in.) |
| Wheelbase | 2874 mm (113.15 in.) |
| Front track | 1594 mm (62.76 in.) |
| Rear (Back) track | 1626 mm (64.02 in.) |
| Minimum turning circle | 11.27 m (36.98 ft.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears | 7 |
| Gearbox type | automatic transmission G-TRONIC PLUS |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent multi-link suspension |
| 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 | 245/45 R17 |
| Wheel rims size | 17 |
Powertrain & Engine Architecture
At the heart of the CLS 350 BlueTEC lies the OM 642.858 3.0-liter V6 diesel engine. This engine, a staple in many Mercedes-Benz vehicles of the era, is characterized by its robust construction and sophisticated technology. It utilizes a common rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. A variable geometry turbocharger, coupled with an intercooler, enhances both power and efficiency. The engine produces 248 horsepower at 3600 rpm and a substantial 620 Nm (457 lb-ft) of torque between 1600 and 2400 rpm. This broad torque curve is a key characteristic of the engine, providing strong acceleration in various driving situations.
The engine is paired with Mercedes-Benz’s 7G-TRONIC PLUS automatic transmission, a seven-speed unit known for its smooth and responsive shifts. This transmission is designed to work seamlessly with the engine’s torque characteristics, optimizing fuel economy and providing a comfortable driving experience. The 4MATIC all-wheel-drive system distributes power between the front and rear axles, enhancing traction and stability, particularly in adverse weather conditions.
Driving Characteristics
The CLS 350 BlueTEC 4MATIC delivers a refined and comfortable driving experience. While not as overtly sporty as the CLS 550, the diesel engine’s ample torque provides brisk acceleration, with a 0-60 mph time of around 6.4 seconds. The 7G-TRONIC transmission shifts smoothly and efficiently, contributing to a relaxed cruising experience. The all-wheel-drive system inspires confidence in various road conditions, providing enhanced grip and stability. Compared to the CLS 300, the 350 BlueTEC offers a noticeable performance upgrade, while remaining more fuel-efficient than the gasoline-powered CLS 550. The gear ratios are tuned for a balance between acceleration and fuel economy, prioritizing comfortable long-distance driving.
Equipment & Trim Levels
The CLS 350 BlueTEC typically came well-equipped with standard features such as leather upholstery, dual-zone automatic climate control, a premium sound system, and a host of safety technologies including attention assist and collision prevention assist. Optional extras included a panoramic sunroof, advanced driver assistance packages (such as lane keeping assist and blind spot monitoring), and upgraded interior trim options. The interior design featured Mercedes-Benz’s signature blend of luxury and technology, with a focus on high-quality materials and intuitive controls. The dashboard layout was clean and modern, with a central display screen providing access to various vehicle functions and infotainment options.
Chassis & Braking
The CLS 350 BlueTEC utilizes an independent suspension system at all four corners, featuring McPherson struts at the front and a multi-link setup at the rear. This suspension configuration provides a comfortable ride while maintaining good handling characteristics. Ventilated disc brakes are fitted on all four wheels, providing ample stopping power. The electronic stability program (ESP) and anti-lock braking system (ABS) work in conjunction to enhance safety and control. The steering is electrically assisted, offering precise and responsive handling.
Market Reception & Comparison
The CLS 350 BlueTEC was generally well-received by automotive critics, who praised its blend of luxury, performance, and fuel efficiency. The diesel engine was lauded for its smooth operation and impressive torque output. The 4MATIC all-wheel-drive system was also appreciated for its added security and stability. Compared to its siblings, the CLS 350 BlueTEC offered a compelling alternative for buyers who prioritized fuel economy and all-weather capability without sacrificing luxury or performance. It provided a more refined and efficient driving experience than the CLS 300, while being more affordable than the CLS 550.
Legacy
The OM 642 engine family, including the OM 642.858 found in the CLS 350 BlueTEC, has a reputation for durability and reliability. With proper maintenance, these engines can accumulate high mileage without major issues. The 7G-TRONIC transmission is also generally considered to be a reliable unit. In the used car market, the CLS 350 BlueTEC represents a good value proposition, offering a luxurious and well-equipped coupe experience at a relatively affordable price point. However, potential buyers should be aware of the potential maintenance costs associated with diesel engines, such as diesel particulate filter (DPF) maintenance and potential issues with the fuel injection system.
