The Mercedes-Benz GLK 350 CDI 4MATIC, produced from June 2012 to May 2015, represents a significant iteration of the X204 GLK-Class compact luxury SUV. Positioned as a mid-to-high range offering within the GLK lineup, it combined a powerful diesel engine with a sophisticated all-wheel-drive system and a smooth-shifting automatic transmission. This variant aimed to deliver a balance of performance, efficiency, and luxury for buyers seeking a capable and refined SUV. It was a key model for Mercedes-Benz in the growing compact luxury SUV segment, competing with vehicles like the BMW X3 and Audi Q5.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | GLK |
| Generation | GLK (X204, facelift 2012) |
| Type | GLK 350 CDI V6 (265 Hp) 4MATIC 7G-TRONIC PLUS |
| Start of production | June, 2012 |
| End of production | May, 2015 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 8.2-8.4 l/100 km (28.7 – 28 US mpg) |
| Fuel consumption (extra urban) | 6.1-6.4 l/100 km (38.6 – 36.8 US mpg) |
| Fuel consumption (combined) | 6.9-7.1 l/100 km (34.1 – 33.1 US mpg) |
| CO2 emissions | 179-185 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6.4 sec |
| Acceleration 0 – 60 mph | 6.1 sec |
| Maximum speed | 232 km/h (144.16 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 7 kg/Hp |
| Weight-to-torque ratio | 3 kg/Nm |
| Power | 265 Hp @ 3800 rpm |
| Torque | 620 Nm @ 1600-2400 rpm (457.29 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 642.835 |
| 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 | 12 l (12.68 US qt | 10.56 UK qt) |
| Kerb Weight | 1850 kg (4078.55 lbs.) |
| Max. weight | 2500 kg (5511.56 lbs.) |
| Max load | 650 kg (1433 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 | 4536 mm (178.58 in.) |
| Width | 1840 mm (72.44 in.) |
| Height | 1669 mm (65.71 in.) |
| Wheelbase | 2755 mm (108.46 in.) |
| Front track | 1574 mm (61.97 in.) |
| Rear track | 1597 mm (62.87 in.) |
| Front overhang | 824 mm (32.44 in.) |
| Rear overhang | 957 mm (37.68 in.) |
| Ride height (ground clearance) | 188 mm (7.4 in.) |
| Drag coefficient (Cd) | 0.35 |
| Minimum turning circle | 11.65 m (38.22 ft.) |
| Front brakes | Ventilated discs, 330 mm |
| Rear brakes | Ventilated discs, 300 mm |
| Gearbox | 7 gears, automatic transmission G-TRONIC PLUS |
INTRODUCTION
The GLK 350 CDI 4MATIC, introduced with the 2012 facelift of the X204 generation, represented a compelling offering in the burgeoning compact luxury SUV market. The X204 GLK, launched in 2008, was Mercedes-Benz’s first foray into this segment, and the facelift brought updated styling, improved interior materials, and enhanced technology. The 350 CDI variant, powered by a robust V6 diesel engine, was positioned above the base GLK 250 and offered a significant step up in performance and refinement. It was designed to appeal to buyers who desired the practicality of an SUV with the driving experience and prestige associated with the Mercedes-Benz brand.
Powertrain & Engine Architecture
At the heart of the GLK 350 CDI 4MATIC lies the OM 642.835 3.0-liter V6 diesel engine. This engine is a hallmark of Mercedes-Benz diesel technology, known for its durability and strong torque output. The OM642 features a common rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. A variable geometry turbocharger with an intercooler further enhances performance, providing ample boost across a wide RPM range. The engine boasts a compression ratio of 15.5:1 and utilizes a double overhead camshaft (DOHC) valvetrain with four valves per cylinder. The engine is longitudinally mounted in the front of the vehicle. Paired with the engine is the 7G-TRONIC PLUS seven-speed automatic transmission, renowned for its smooth and responsive shifts. This transmission features a torque converter lock-up clutch for improved efficiency and a manual shift mode for driver control.
Driving Characteristics
The GLK 350 CDI 4MATIC delivers a distinctly refined driving experience. The 620 Nm (457 lb-ft) of torque, available from a low 1600-2400 rpm, provides effortless acceleration and strong pulling power. The 0-60 mph sprint takes approximately 6.1 seconds, making it a surprisingly quick SUV for its class. The 7G-TRONIC PLUS transmission contributes to this performance, offering seamless gear changes and keeping the engine in its optimal power band. While not as sporty as some of its competitors, the GLK 350 CDI prioritizes comfort and composure. The 4MATIC all-wheel-drive system provides excellent traction in various conditions, enhancing stability and confidence. Compared to the base GLK 250, the 350 CDI offers a significantly more powerful and responsive driving experience. It also feels more planted and stable, particularly when fully loaded or towing.
Equipment & Trim Levels
The GLK 350 CDI 4MATIC came well-equipped as standard. Typical features included leather upholstery, power-adjustable front seats with memory function, dual-zone automatic climate control, a premium audio system, and a rearview camera. Mercedes-Benz’s COMAND infotainment system with a central display screen was also standard, offering navigation, Bluetooth connectivity, and access to various vehicle settings. Optional extras included a panoramic sunroof, heated and ventilated front seats, a Harman Kardon surround sound system, and advanced driver-assistance features such as blind-spot monitoring and lane-keeping assist. Interior trim options included wood, aluminum, and carbon fiber accents, allowing buyers to personalize the cabin to their preferences.
Chassis & Braking
The GLK 350 CDI 4MATIC features a robust chassis designed to handle the engine’s power and provide a comfortable ride. The front suspension utilizes a McPherson strut design with coil springs and an anti-roll bar, while the rear suspension employs a multi-link setup, also with coil springs and an anti-roll bar. This configuration provides a good balance of ride comfort and handling precision. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. Anti-lock brakes (ABS) and electronic stability control (ESC) are standard safety features. The GLK 350 CDI’s weight distribution is well-balanced, contributing to its stable and predictable handling characteristics.
Market Reception & Comparison
The GLK 350 CDI 4MATIC was generally well-received by automotive critics. Reviewers praised its powerful and efficient diesel engine, comfortable ride, and luxurious interior. The 4MATIC all-wheel-drive system was also lauded for its capability in inclement weather. Compared to the GLK 250, the 350 CDI offered a significant performance upgrade, but at a higher price point. Against competitors like the BMW X3 and Audi Q5, the GLK 350 CDI was often seen as a more comfortable and refined option, although some critics noted that its handling wasn’t quite as sharp. Fuel economy was a strong point, with combined figures ranging from 33.1 to 34.1 US mpg, making it an attractive option for drivers seeking efficiency.
Legacy
The OM 642 diesel engine used in the GLK 350 CDI is known for its longevity and reliability, provided it receives regular maintenance. These engines are capable of exceeding 200,000 miles with proper care. However, like all diesel engines, they can be susceptible to issues with the diesel particulate filter (DPF) and fuel injectors. On the used car market, the GLK 350 CDI 4MATIC remains a desirable option for buyers seeking a capable and well-equipped luxury SUV. Its combination of performance, efficiency, and comfort continues to appeal to a wide range of drivers. While newer models have since replaced the X204 GLK, the 350 CDI variant holds a respected position among enthusiasts and remains a testament to Mercedes-Benz’s diesel engineering prowess.
