The Mercedes-Benz GLK 220 CDI BlueEFFICIENCY 4MATIC, produced from 2011 to 2012, was a key variant within the first generation (X204) of the GLK-Class compact luxury SUV. Positioned as a fuel-efficient diesel option within the GLK range, it aimed to balance practicality, comfort, and reasonable running costs. This model served primarily the European market, where diesel engines held significant popularity, though limited numbers were also available in other regions. It represented Mercedes-Benz’s entry point into the compact SUV segment, competing with vehicles like the BMW X3 and Audi Q5.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | GLK |
| Generation | GLK (X204) |
| Type | GLK 220 CDI BlueEFFICIENCY (170 Hp) 4MATIC 7G-TRONIC PLUS |
| Start of production | 2011 |
| End of production | 2012 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 7.1-7.4 l/100 km (33.1 – 31.8 US mpg) |
| Fuel consumption (extra urban) | 5.5-5.9 l/100 km (42.8 – 39.9 US mpg) |
| Fuel consumption (combined) | 6.1-6.5 l/100 km (38.6 – 36.2 US mpg) |
| CO2 emissions | 159-168 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 8.8 sec |
| Acceleration 0 – 60 mph | 8.4 sec |
| Maximum speed | 205 km/h (127.38 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 10.6 kg/Hp |
| Weight-to-torque ratio | 4.5 kg/Nm |
| Power | 170 Hp @ 3200-4800 rpm |
| Torque | 400 Nm @ 1400-2800 rpm (295.02 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 651.912 |
| Engine displacement | 2143 cm3 (130.77 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 99 mm (3.9 in.) |
| Compression ratio | 16.2:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | BiTurbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Kerb Weight | 1805 kg (3979.34 lbs.) |
| Max. weight | 2450 kg (5401.33 lbs.) |
| Max load | 645 kg (1421.98 lbs.) |
| Trunk (boot) space (min) | 450 l (15.89 cu. ft.) |
| Trunk (boot) space (max) | 1550 l (54.74 cu. ft.) |
| Fuel tank capacity | 59 l (15.59 US gal | 12.98 UK gal) |
| Length | 4525 mm (178.15 in.) |
| Width | 1840 mm (72.44 in.) |
| Height | 1689 mm (66.5 in.) |
| Wheelbase | 2755 mm (108.46 in.) |
| Front track | 1567 mm (61.69 in.) |
| Rear track | 1588 mm (62.52 in.) |
| Drag coefficient (Cd) | 0.34 |
| Minimum turning circle | 11.5 m (37.73 ft.) |
| Drivetrain Architecture | All wheel drive (4×4) |
| Number of gears | 7 |
| Gearbox type | Automatic transmission G-TRONIC PLUS |
INTRODUCTION
The GLK 220 CDI BlueEFFICIENCY, launched in 2011, represented a significant addition to the X204 GLK lineup. Built on the W204 C-Class platform, the GLK aimed to offer a more rugged and upright aesthetic compared to its sedan sibling. The “BlueEFFICIENCY” designation signified Mercedes-Benz’s efforts to improve fuel economy and reduce emissions through various technologies. This particular variant, with its 2.1-liter diesel engine and 4MATIC all-wheel-drive system, was designed to appeal to buyers seeking a practical and efficient luxury SUV. It occupied a mid-range position in the GLK portfolio, offering a balance between performance and economy, sitting below the more powerful GLK 350 models.
Powertrain & Engine Architecture
At the heart of the GLK 220 CDI BlueEFFICIENCY lies the OM 651.912 2.1-liter inline-four cylinder diesel engine. This engine is a highly advanced design featuring common-rail direct injection and a sophisticated bi-turbocharger system. The twin turbochargers, a smaller and a larger unit, work in sequence to provide both rapid response at low engine speeds and sustained power at higher RPMs. The engine boasts a high compression ratio of 16.2:1, contributing to its efficiency. The 7G-TRONIC PLUS automatic transmission, a seven-speed unit, was standard. This transmission is known for its smooth shifting and ability to adapt to driving conditions. It features a torque converter lock-up clutch to improve fuel efficiency at cruising speeds. The transmission was specifically tuned to complement the diesel engine’s torque characteristics, providing seamless acceleration and comfortable highway cruising.
Driving Characteristics
The GLK 220 CDI 4MATIC offered a comfortable and refined driving experience. While not overtly sporty, the 170 horsepower and 400 Nm (295 lb-ft) of torque provided adequate performance for everyday driving. Acceleration from 0-60 mph took approximately 8.4 seconds, and the vehicle had a top speed of 205 km/h (127 mph). The 7G-TRONIC PLUS transmission contributed to smooth gear changes, and the all-wheel-drive system provided enhanced traction in various weather conditions. Compared to the more powerful GLK 350, the 220 CDI felt less urgent in its acceleration, but it offered significantly better fuel economy. The gear ratios were optimized for fuel efficiency, with taller gearing in higher gears to reduce engine RPM at highway speeds. The steering was precise and well-weighted, providing a confident feel on the road.
Equipment & Trim Levels
The GLK 220 CDI BlueEFFICIENCY came standard with a comprehensive list of features. These included automatic climate control, power windows and locks, a multi-function steering wheel, and a high-quality audio system. Upholstery was typically Artico leatherette, a durable and easy-to-clean synthetic leather. Optional extras included genuine leather upholstery, a panoramic sunroof, a navigation system, and parking sensors. The interior design was typical of Mercedes-Benz, with a focus on quality materials and a sophisticated layout. The dashboard featured a prominent central display screen and intuitive controls.
Chassis & Braking
The GLK 220 CDI utilized an independent suspension system at all four wheels. The front suspension employed McPherson struts with coil springs and an anti-roll bar, while the rear suspension featured a multi-link setup, also with coil springs and an anti-roll bar. This suspension configuration provided a comfortable ride and good handling characteristics. The braking system consisted of ventilated discs at the front and solid discs at the rear. Anti-lock brakes (ABS) and electronic stability control (ESP) were standard safety features. The all-wheel-drive system, 4MATIC, distributed power between the front and rear axles as needed to optimize traction.
Market Reception & Comparison
The GLK 220 CDI BlueEFFICIENCY was generally well-received by automotive critics. It was praised for its fuel efficiency, comfortable ride, and refined interior. However, some reviewers noted that the engine could feel somewhat strained when accelerating hard, and the overall performance was not as exhilarating as some of its competitors. Compared to the GLK 350, the 220 CDI offered significantly better fuel economy – around 6.1-6.5 l/100km compared to the GLK 350’s 8.1-8.5 l/100km. The 220 CDI was also typically less expensive to maintain due to the simpler engine design and lower power output.
Legacy
The OM 651 engine family, used in the GLK 220 CDI, has proven to be remarkably reliable over the long term. With proper maintenance, these engines can easily exceed 200,000 kilometers (125,000 miles) without major issues. The 7G-TRONIC PLUS transmission is also known for its durability. In the used car market, the GLK 220 CDI BlueEFFICIENCY remains a popular choice for buyers seeking a practical and fuel-efficient luxury SUV. Its combination of comfort, reliability, and reasonable running costs makes it a compelling option, even compared to newer vehicles. However, potential buyers should be aware of the potential for diesel particulate filter (DPF) issues, particularly if the vehicle has been primarily used for short trips.
