The Mercedes-Benz GLK 220 CDI BlueEFFICIENCY, produced from 2011 to 2012, was a diesel-powered variant of the X204 GLK-Class compact luxury SUV. Positioned as a fuel-efficient option within the GLK range, it aimed to balance practicality, comfort, and reasonable performance. This model represented Mercedes-Benz’s entry into the burgeoning compact SUV segment, offering a more accessible price point than larger offerings like the ML-Class while still delivering the brand’s hallmark refinement. It was primarily marketed in Europe and other regions where diesel engines held significant market share.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | GLK |
| Generation | GLK (X204) |
| Type | GLK 220 CDI BlueEFFICIENCY (170 Hp) 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) | 6.4-6.8 l/100 km (36.8 – 34.6 US mpg, 44.1 – 41.5 UK mpg, 15.6 – 14.7 km/l) |
| Fuel consumption (extra urban) | 5.1-5.5 l/100 km (46.1 – 42.8 US mpg, 55.4 – 51.4 UK mpg, 19.6 – 18.2 km/l) |
| Fuel consumption (combined) | 5.6-6 l/100 km (42 – 39.2 US mpg, 50.4 – 47.1 UK mpg, 17.9 – 16.7 km/l) |
| CO2 emissions | 145-156 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 | 10.4 kg/Hp, 96 Hp/tonne |
| Weight-to-torque ratio | 4.4 kg/Nm, 226 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 | 1770 kg (3902.18 lbs.) |
| Max. weight | 2425 kg (5346.21 lbs.) |
| Max load | 655 kg (1444.03 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 | 4525 mm (178.15 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 | 1588 mm (62.52 in.) |
| Front overhang | 813 mm (32.01 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 PLUS |
| 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 diesel engine. This engine was a mainstay in the Mercedes-Benz lineup, known for its robust construction and fuel efficiency. It featured common-rail direct injection, delivering fuel at extremely high pressure for optimized combustion. The engine employed a variable geometry turbocharger and an intercooler to enhance power and torque across a broad rev range. The ‘BlueEFFICIENCY’ designation indicated the inclusion of fuel-saving technologies such as start-stop functionality and optimized aerodynamics. The 7G-TRONIC PLUS automatic transmission, a seven-speed unit, was standard. This transmission offered smooth shifts and contributed to the vehicle’s overall efficiency. It featured a torque converter lock-up clutch to minimize slippage and improve fuel economy.
Driving Characteristics
The 170 hp and 400 Nm (295 lb-ft) of torque provided by the GLK 220 CDI BlueEFFICIENCY offered adequate, though not exhilarating, performance. Acceleration from 0-60 mph took around 8.3 seconds, and the top speed was 205 km/h (127 mph). The 7G-TRONIC PLUS transmission was well-matched to the engine, providing smooth and relatively quick gear changes. Compared to higher-output GLK variants, such as the GLK 350, the 220 CDI felt less responsive, particularly during overtaking maneuvers. However, the strong low-end torque of the diesel engine made it a capable cruiser and provided sufficient power for everyday driving. The automatic transmission, while convenient, lacked the engagement and control offered by the optional six-speed manual gearbox available on some models.
Equipment & Trim Levels
The GLK 220 CDI BlueEFFICIENCY typically came equipped with a respectable level of standard features. These included automatic climate control, a multi-function steering wheel, power windows and mirrors, and an audio system with a CD player. Upholstery was generally cloth, though leather options were available. Optional extras included a sunroof, navigation system, parking sensors, and upgraded audio systems. The trim level could vary depending on the market, but generally, the 220 CDI was positioned as a mid-range offering, bridging the gap between the base models and the more luxurious trims.
Chassis & Braking
The GLK 220 CDI featured a McPherson strut front suspension and a multi-link independent rear suspension. This setup provided a comfortable ride quality, absorbing bumps and irregularities in the road surface effectively. Stabilizer bars were fitted to both axles to reduce body roll during cornering. The braking system consisted of ventilated disc brakes on all four wheels. Anti-lock braking system (ABS) and electronic brakeforce distribution (EBD) were standard safety features. The GLK’s weight distribution was relatively balanced, contributing to its predictable handling characteristics.
Market Reception & Comparison
The GLK 220 CDI BlueEFFICIENCY was generally well-received by automotive critics, particularly for its fuel efficiency and comfortable ride. However, some reviewers noted that the engine lacked the refinement and power of its competitors. Compared to other GLK variants, the 220 CDI offered the best fuel economy, making it an attractive option for drivers prioritizing efficiency. The 1.8L petrol version offered less torque but a more responsive feel, while the higher-powered GLK 350 provided significantly more performance but at the expense of fuel economy. Reliability was generally good, typical of Mercedes-Benz vehicles, although diesel particulate filter (DPF) issues could occasionally arise with infrequent long-distance driving.
Legacy
The GLK 220 CDI BlueEFFICIENCY remains a relatively common sight on the used car market. The OM 651 engine is known for its durability, and with proper maintenance, these engines can reliably exceed 200,000 miles. However, potential buyers should be aware of the possibility of DPF issues and the cost of maintaining the complex fuel injection system. The GLK, as a whole, helped establish Mercedes-Benz as a serious contender in the compact luxury SUV segment, paving the way for the subsequent GLC-Class. The 220 CDI variant, in particular, offered a compelling blend of efficiency and practicality for those seeking a refined and comfortable SUV.
