The Mercedes-Benz GLK 350 CDI 4MATIC, produced between 2010 and 2012, represented a compelling entry into the burgeoning luxury compact SUV segment. Part of the X204 GLK series, this variant combined a potent diesel engine with a sophisticated all-wheel-drive system and a smooth-shifting seven-speed automatic transmission. Positioned as a mid-range offering within the GLK lineup, it aimed to deliver a balance of performance, efficiency, and luxury features, appealing to buyers seeking a refined and capable SUV. The GLK, in general, was Mercedes-Benz’s attempt to capture a younger demographic and compete with the BMW X3 and Audi Q5.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | GLK |
| Generation | GLK (X204) |
| Type | GLK 350 CDI V6 (231 Hp) 4MATIC 7G-TRONIC |
| Start of production | 2010 |
| End of production | 2012 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 9.9-10.6 l/100 km (23.8 – 22.2 US mpg) |
| Fuel consumption (extra urban) | 6.8-7.1 l/100 km (34.6 – 33.1 US mpg) |
| Fuel consumption (combined) | 8-8.4 l/100 km (29.4 – 28 US mpg) |
| CO2 emissions | 209-220 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 7.3 sec |
| Acceleration 0 – 60 mph | 6.9 sec |
| Maximum speed | 225 km/h (139.81 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 7.8 kg/Hp |
| Weight-to-torque ratio | 3.3 kg/Nm |
| Power | 231 Hp @ 3800 rpm |
| Torque | 540 Nm @ 1600-2400 rpm (398.28 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 642.832 |
| 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 | 18:1 |
| 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) |
| Kerb Weight | 1805 kg (3979.34 lbs.) |
| Max. weight | 2500 kg (5511.56 lbs.) |
| Max load | 695 kg (1532.21 lbs.) |
| Trunk (boot) space (min) | 450 l (15.89 cu. ft.) |
| Trunk (boot) space (max) | 1550 l (54.74 cu. ft.) |
| Fuel tank capacity | 66 l (17.44 US gal | 14.52 UK gal) |
| Length | 4525 mm (178.15 in.) |
| Width | 1840 mm (72.44 in.) |
| Height | 1698 mm (66.85 in.) |
| Wheelbase | 2755 mm (108.46 in.) |
| Front track | 1567 mm (61.69 in.) |
| Rear track | 1588 mm (62.52 in.) |
| Drivetrain Architecture | All wheel drive (4×4) |
| Number of gears | 7 |
| Gearbox type | Automatic transmission G-TRONIC |
Powertrain & Engine Architecture
The heart of the GLK 350 CDI 4MATIC is the OM 642.832 3.0-liter V6 diesel engine. This engine, a mainstay 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 pressure for optimized combustion. A variable geometry turbocharger with an intercooler further enhances performance and efficiency. The engine produces 231 horsepower at 3800 rpm and a substantial 540 Nm (398 lb-ft) of torque between 1600 and 2400 rpm. This broad torque curve provides strong acceleration and effortless cruising. The engine also features a diesel particulate filter to minimize emissions, meeting Euro 5 standards. The 7G-TRONIC seven-speed automatic transmission is a key component, offering smooth and responsive gear changes. It’s designed to work seamlessly with the engine’s torque characteristics, optimizing both performance and fuel economy.
Driving Characteristics
The GLK 350 CDI 4MATIC delivers a refined and capable driving experience. The abundant torque from the diesel engine provides brisk acceleration, with a 0-60 mph time of around 6.9 seconds. While not a sports SUV, it feels confident and composed on the road. The 7G-TRONIC transmission contributes to a smooth and seamless driving experience, with well-chosen gear ratios. Compared to the gasoline-powered GLK 350, the CDI offers significantly better fuel economy and a more relaxed driving style, thanks to the engine’s lower rev range. Compared to the GLK 280, the CDI offered a substantial increase in torque, making it more suitable for towing and tackling challenging terrain. The 4MATIC all-wheel-drive system provides excellent traction in various conditions, enhancing stability and control.
Equipment & Trim Levels
The GLK 350 CDI 4MATIC typically came well-equipped with standard features such as leather upholstery, dual-zone automatic climate control, a power liftgate, and a premium audio system. Optional extras included navigation, a panoramic sunroof, heated seats, and advanced driver-assistance systems like blind-spot monitoring and lane-keeping assist. Interior trim options varied, allowing buyers to personalize the cabin with wood or aluminum accents. The dashboard layout was functional and elegant, typical of Mercedes-Benz design. The GLK aimed for a luxurious feel, but it wasn’t quite as opulent as larger Mercedes SUVs.
Chassis & Braking
The GLK 350 CDI 4MATIC features an independent suspension system, with McPherson struts at the front and a multi-link setup at the rear. This configuration provides a comfortable ride and good handling characteristics. Stabilizer bars are fitted to both axles to reduce body roll during cornering. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. Anti-lock brakes (ABS) and electronic stability control (ESP) are standard safety features. The GLK’s chassis was tuned to balance comfort and handling, making it a pleasant vehicle to drive on both city streets and highways.
Market Reception & Comparison
The GLK 350 CDI 4MATIC was generally well-received by automotive critics. It was praised for its fuel efficiency, strong performance, and comfortable ride. However, some reviewers noted that the interior space was somewhat limited compared to competitors. The diesel engine was a major selling point, offering a compelling alternative to gasoline engines for buyers prioritizing fuel economy. Compared to the GLK 350 (gasoline), the CDI offered better fuel economy and torque, but slightly less overall horsepower. Against rivals like the BMW X3 and Audi Q5, the GLK CDI offered a unique blend of luxury, performance, and efficiency.
Legacy
The OM 642 engine family, including the one found in the GLK 350 CDI, is known for its durability and reliability. With proper maintenance, these engines can accumulate high mileage without major issues. The 7G-TRONIC transmission is also generally reliable, although some units may require fluid changes and occasional servicing. Today, the GLK 350 CDI 4MATIC represents a good value on the used car market, offering a refined and capable SUV at a reasonable price. However, potential buyers should be aware of the higher maintenance costs associated with diesel engines, including diesel emission system components. The GLK, while discontinued, laid the groundwork for the GLC, which continues Mercedes-Benz’s presence in the compact luxury SUV segment.
