The Mercedes-Benz GLK 220 CDI BlueEFFICIENCY, produced between 2009 and 2011, was a key variant within the first generation (X204) of the GLK-Class compact luxury SUV. Positioned as a fuel-efficient entry point into the GLK range, it offered a blend of practicality, comfort, and relatively economical diesel power. This model aimed to appeal to buyers seeking the prestige of the Mercedes-Benz brand in a smaller, more manageable package, particularly in European markets where diesel engines were highly favored. It served as a more accessible alternative to the more powerful GLK 320 CDI and GLK 350 models.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | GLK |
| Generation | GLK (X204) |
| Type (Engine) | GLK 220 CDI BlueEFFICIENCY (170 Hp) 7G-TRONIC |
| Start of production | 2009 |
| End of production | 2011 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 8-8.4 l/100 km (29.4 – 28 US mpg, 35.3 – 33.6 UK mpg, 12.5 – 11.9 km/l) |
| Fuel consumption (extra urban) | 5.3-5.6 l/100 km (44.4 – 42 US mpg, 53.3 – 50.4 UK mpg, 18.9 – 17.9 km/l) |
| Fuel consumption (combined) | 6.3-6.7 l/100 km (37.3 – 35.1 US mpg, 44.8 – 42.2 UK mpg, 15.9 – 14.9 km/l) |
| CO2 emissions | 164-174 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 8.7 sec |
| Acceleration 0 – 62 mph | 8.7 sec |
| Acceleration 0 – 60 mph | 8.3 sec |
| Maximum speed | 205 km/h (127.38 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 10.2 kg/Hp, 98 Hp/tonne |
| Weight-to-torque ratio | 4.3 kg/Nm, 230.5 Nm/tonne |
| Power | 170 Hp @ 3200-4800 rpm |
| Power per litre | 79.3 Hp/l |
| Torque | 400 Nm @ 1400-2800 rpm (295.02 lb.-ft. @ 1400-2800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 651.916 |
| 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 | 1735 kg (3825.02 lbs.) |
| Max. weight | 2400 kg (5291.09 lbs.) |
| Max load | 665 kg (1466.07 lbs.) |
| Trunk (boot) space – minimum | 450 l (15.89 cu. ft.) |
| Trunk (boot) space – maximum | 1550 l (54.74 cu. ft.) |
| Fuel tank capacity | 59 l (15.59 US gal | 12.98 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Permitted trailer load with brakes (12%) | 2000 kg (4409.25 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 4528 mm (178.27 in.) |
| Width | 1840 mm (72.44 in.) |
| Width including mirrors | 2016 mm (79.37 in.) |
| Height | 1689 mm (66.5 in.) |
| Wheelbase | 2755 mm (108.46 in.) |
| Front track | 1567 mm (61.69 in.) |
| Rear track | 1569 mm (61.77 in.) |
| Front overhang | 816 mm (32.13 in.) |
| Rear overhang | 957 mm (37.68 in.) |
| Ride height (ground clearance) | 201 mm (7.91 in.) |
| Drag coefficient (Cd) | 0.34 |
| Minimum turning circle | 11.5 m (37.73 ft.) |
| Approach angle | 23° |
| Departure angle | 25° |
| Ramp-over angle | 19° |
| Climb angle | 35° |
| Wading depth | 300 mm (11.81 in.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears and type of gearbox | 7 gears, automatic transmission G-TRONIC |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| Front brakes | Ventilated discs, 330×32 mm |
| Rear brakes | Ventilated discs, 300×22 mm |
Powertrain & Engine Architecture
The GLK 220 CDI BlueEFFICIENCY was powered by the OM 651.916, a 2.1-liter inline-four cylinder diesel engine. This engine was a cornerstone of Mercedes-Benz’s diesel offerings during this period, known for its robust construction and efficiency. The ‘BlueEFFICIENCY’ designation indicated the inclusion of various fuel-saving technologies, including optimized engine management, reduced friction components, and a particulate filter to minimize emissions. The engine utilized a common rail direct injection system, delivering fuel at extremely high pressure for improved combustion and reduced noise. It was equipped with a bi-turbocharger system – a small turbocharger for quick response at low engine speeds and a larger turbocharger for increased power at higher RPMs. The 7G-TRONIC automatic transmission, a seven-speed unit, was standard. This transmission was praised for its smooth shifting and contribution to fuel economy. The transmission’s gear ratios were tuned to maximize the engine’s torque output, providing good acceleration and highway cruising ability.
Driving Characteristics
The 170 horsepower and 400 Nm (295 lb-ft) of torque delivered by the GLK 220 CDI BlueEFFICIENCY provided adequate, though not exhilarating, performance. Acceleration from 0 to 60 mph took around 8.3 seconds, making it competitive within its class. The 7G-TRONIC transmission helped to mask the engine’s limitations, providing smooth and relatively quick gear changes. Compared to the more powerful GLK 320 CDI, the 220 CDI felt noticeably less responsive, particularly during overtaking maneuvers. However, the 220 CDI offered a more relaxed driving experience, with a focus on fuel efficiency and comfort. The torque curve was relatively flat, providing good pulling power from low engine speeds, which was beneficial for everyday driving and towing. The rear-wheel drive configuration contributed to a balanced feel, although it lacked the all-weather capability of the optional 4MATIC all-wheel drive system.
Equipment & Trim Levels
The GLK 220 CDI BlueEFFICIENCY typically came standard with features such as automatic climate control, power windows and locks, a multi-function steering wheel, and an audio system with CD player. Upholstery was generally cloth, though leather options were available. Optional extras included a sunroof, navigation system, upgraded audio systems, parking sensors, and heated seats. Trim levels were relatively simple, with most options being added individually. The interior design was typical of Mercedes-Benz at the time, emphasizing quality materials and a functional layout. The dashboard featured a prominent central display screen and a clear instrument cluster.
Chassis & Braking
The GLK 220 CDI utilized an independent suspension system all around, with McPherson struts at the front and a multi-link setup at the rear. This provided a comfortable ride quality, absorbing bumps and imperfections in the road effectively. Stabilizer bars were fitted to both axles to reduce body roll during cornering. Braking duties were handled by ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) and electronic brake-force distribution were standard safety features. The GLK’s chassis was designed to provide a balance between comfort and handling, prioritizing stability and predictability over sporty dynamics.
Market Reception & Comparison
The GLK 220 CDI BlueEFFICIENCY was generally well-received by automotive critics, particularly for its fuel efficiency and comfortable ride. It was seen as a practical and economical choice for buyers seeking a compact luxury SUV. Compared to the GLK 320 CDI, the 220 CDI offered significantly better fuel economy, but at the expense of performance. The 220 CDI also undercut the 320 CDI in price, making it a more accessible option for a wider range of buyers. Reliability was generally good, although some owners reported issues with the diesel particulate filter and the occasional electronic glitch.
Legacy
The OM 651 engine family, including the 2.1-liter variant used in the GLK 220 CDI, proved to be a durable and reliable powerplant. These engines are still found in many used vehicles today and, with proper maintenance, can provide many years of service. The GLK 220 CDI BlueEFFICIENCY remains a relatively popular choice in the used car market, particularly for buyers seeking a fuel-efficient and well-equipped compact SUV. Its blend of practicality, comfort, and Mercedes-Benz prestige continues to appeal to a wide range of drivers. While not a performance standout, it represents a solid and dependable option within the first-generation GLK lineup.
