The Mercedes-Benz CLS 350 BlueTEC 4MATIC, produced from July 2014 to April 2015, represents a compelling blend of luxury, performance, and efficiency within the C218 facelift generation of the CLS coupe. 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 refined diesel powertrain. This variant aimed to bridge the gap between the more accessible CLS 300 and the higher-performance CLS 550 models, offering a balance of power and economy. It was primarily marketed towards European and Asian markets where diesel engines were more prevalent, though a limited number were available in the United States.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | CLS |
| Generation | CLS coupe (C218 facelift, 2014) |
| Type | CLS 350 BlueTEC V6 (252 Hp) 4MATIC 7G-TRONIC PLUS |
| Start of production | July, 2014 |
| End of production | April, 2015 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 4 |
| Fuel consumption (urban) | 7.3-7.5 l/100 km (32.2 – 31.4 US mpg) |
| Fuel consumption (extra urban) | 5.3-5.8 l/100 km (44.4 – 40.6 US mpg) |
| Fuel consumption (combined) | 6.1-6.3 l/100 km (38.6 – 37.3 US mpg) |
| CO2 emissions | 160-166 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 | 245 km/h (152.24 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 7.3 kg/Hp |
| Weight-to-torque ratio | 3 kg/Nm |
| Power | 252 Hp @ 3600 rpm |
| Torque | 620 Nm @ 1600-2400 rpm (457.29 lb.-ft.) |
| 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 |
| 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 capacity | 10.8 l (11.41 US qt | 9.5 UK qt) |
| Kerb Weight | 1840 kg (4056.51 lbs.) |
| Max. weight | 2400 kg (5291.09 lbs.) |
| Max load | 560 kg (1234.59 lbs.) |
| Trunk space (minimum) | 475 l (16.77 cu. ft.) |
| Fuel tank capacity | 59 l (15.59 US gal | 12.98 UK gal) |
| AdBlue tank | 25.5 l (6.74 US gal | 5.61 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Length | 4937 mm (194.37 in.) |
| Width | 1881 mm (74.06 in.) |
| Width including mirrors | 2075 mm (81.69 in.) |
| Height | 1418 mm (55.83 in.) |
| Wheelbase | 2874 mm (113.15 in.) |
| Front track | 1596 mm (62.83 in.) |
| Rear track | 1626 mm (64.02 in.) |
| Front overhang | 898 mm (35.35 in.) |
| Rear overhang | 1165 mm (45.87 in.) |
| Minimum turning circle | 11.51 m (37.76 ft.) |
| Front suspension | Coil spring, Independent multi-link suspension, Transverse stabilizer, Air Suspension – Optional |
| Rear suspension | Independent multi-link spring suspension with stabilizer, Air Suspension – Optional |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Gearbox | 7 gears, automatic transmission G-TRONIC PLUS |
Powertrain & Engine Architecture
The CLS 350 BlueTEC utilized the OM 642.858 3.0-liter V6 diesel engine. This engine, a mainstay in many Mercedes-Benz vehicles of the era, featured a common rail direct injection system, a variable geometry turbocharger, and an intercooler. The engine produced 252 horsepower at 3600 rpm and a substantial 620 Nm (457 lb-ft) of torque between 1600 and 2400 rpm. The “BlueTEC” designation indicated the inclusion of advanced emissions control technologies, including a selective catalytic reduction (SCR) system utilizing AdBlue (diesel exhaust fluid) to reduce nitrogen oxide (NOx) emissions, ensuring compliance with stringent Euro 6 standards. The engine’s robust construction and advanced technologies contributed to its longevity and relatively low maintenance requirements. The 7G-TRONIC PLUS automatic transmission, a seven-speed unit, was standard. This transmission was known for its smooth shifting and efficiency, contributing to the overall refined driving experience.
Driving Characteristics
The CLS 350 BlueTEC 4MATIC offered a comfortable and composed driving experience. While not overtly sporty, the engine’s ample torque provided strong acceleration, with a 0-60 mph time of around 6.4 seconds. The 7G-TRONIC PLUS transmission was well-matched to the engine, providing seamless gear changes and contributing to relaxed highway cruising. The 4MATIC all-wheel-drive system enhanced traction and stability, particularly in adverse weather conditions. Compared to the more powerful CLS 550, the 350 BlueTEC prioritized fuel efficiency and refinement over outright performance. It also offered a more relaxed driving experience than versions equipped with a manual transmission, which were less common.
Equipment & Trim Levels
The CLS 350 BlueTEC 4MATIC came standard with a generous array of features, including leather upholstery, dual-zone automatic climate control, a premium sound system, and a comprehensive suite of safety technologies. Optional extras included a panoramic sunroof, advanced driver-assistance systems (such as adaptive cruise control and lane-keeping assist), and upgraded interior trim options. The interior design was characterized by its elegant styling and high-quality materials, reflecting Mercedes-Benz’s commitment to luxury.
Chassis & Braking
The CLS 350 BlueTEC featured a sophisticated suspension system designed to balance comfort and handling. The front suspension utilized coil springs and an independent multi-link setup, while the rear suspension employed an independent multi-link spring suspension. Air suspension was available as an optional upgrade, further enhancing ride comfort. Ventilated disc brakes were fitted to all four wheels, providing ample stopping power. The electronic stability program (ESP) and anti-lock braking system (ABS) were standard safety features.
Market Reception & Comparison
The CLS 350 BlueTEC 4MATIC was generally well-received by automotive critics. It was praised for its refined driving experience, fuel efficiency, and luxurious interior. However, some reviewers noted that its performance was not as exhilarating as that of the CLS 550. Compared to other trims, the 350 BlueTEC offered a compelling value proposition for buyers seeking a balance of luxury, performance, and economy. Its fuel economy figures were significantly better than those of the gasoline-powered CLS 550, making it a more practical choice for long-distance driving.
Legacy
The OM 642 engine family, including the OM 642.858 found in the CLS 350 BlueTEC, has proven to be remarkably durable and reliable. With proper maintenance, these engines can accumulate high mileage without major issues. The 7G-TRONIC PLUS transmission is also known for its longevity. In the used car market, the CLS 350 BlueTEC 4MATIC remains a desirable option for buyers seeking a stylish and comfortable coupe with reasonable running costs. However, potential buyers should be aware of the maintenance requirements of the BlueTEC emissions system, including the need to regularly replenish the AdBlue fluid.
