The Mercedes-Benz GLK 220 CDI, produced from June 2012 to May 2015, represents a key variant within the X204 GLK facelift range. Positioned as a diesel-powered, mid-range offering, it aimed to balance fuel efficiency with respectable performance and luxury features. This model occupied an important space in Mercedes-Benz’s compact SUV lineup, particularly in European markets where diesel engines were – and continue to be – highly favored. The GLK, as a whole, was Mercedes-Benz’s entry into the growing compact luxury SUV segment, competing with vehicles like the BMW X3 and Audi Q5. The 220 CDI trim, with its 7G-TRONIC PLUS automatic transmission, was designed to appeal to buyers seeking a comfortable and economical daily driver.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | GLK |
| Generation | GLK (X204, facelift 2012) |
| Type (Engine) | GLK 220 CDI (170 Hp) 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 (economy) – urban (NEDC) | 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 (economy) – extra urban (NEDC) | 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 (economy) – combined (NEDC) | 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 (NEDC) | 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 @ 3200-4200 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 | Twin-Turbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 10 l (10.57 US qt | 8.8 UK qt) |
| Kerb Weight | 1770 kg (3902.18 lbs.) |
| Max. weight | 2420 kg (5335.19 lbs.) |
| Max load | 650 kg (1433 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%) | 2400 kg (5291.09 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 100 kg (220.46 lbs.) |
| Length | 4536 mm (178.58 in.) |
| Width | 1840 mm (72.44 in.) |
| Width including mirrors | 2016 mm (79.37 in.) |
| Height | 1669 mm (65.71 in.) |
| Wheelbase | 2755 mm (108.46 in.) |
| Front track | 1574 mm (61.97 in.) |
| Rear (Back) 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) | 0.34 |
| Minimum turning circle (turning diameter) | 11.65 m (38.22 ft.) |
| Approach angle | 22.8° |
| Departure angle | 24.6° |
| Wading depth | 300 mm (11.81 in.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | 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 mm |
| Rear brakes | Ventilated discs, 300 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | Front wheel tires: 235/60 R17; 235/50 R19; 235/45 R20; Rear wheel tires: 235/60 R17; 255/55 R17; 235/50 R19; 255/45 R19; 255/40 R20 |
| Wheel rims size | Front wheel rims: 7.5J x 17; 7.5J x 19; 8J x 20; 8.5J x 20; Rear wheel rims: 7.5J x 17; 8J x 17; 7.5J x 19; 8.5J x 19; 9J x 20; 9.5J x 20 |
INTRODUCTION
The Mercedes-Benz GLK 220 CDI (X204 facelift, 2012-2015) was a significant offering in the premium compact SUV segment. Built on the X204 platform, which underwent a notable facelift in 2012, this variant combined the practicality of an SUV with the refinement expected from the Mercedes-Benz brand. The 220 CDI designation indicated its use of a 2.1-liter four-cylinder diesel engine, paired exclusively with the 7G-TRONIC PLUS seven-speed automatic transmission. This combination aimed to deliver a balance of fuel economy, adequate performance, and a comfortable driving experience, making it a popular choice for European buyers and increasingly, those in other markets.
Powertrain & Engine Architecture
At the heart of the GLK 220 CDI lies the OM651.916 2.1-liter inline-four cylinder diesel engine. This engine is a highly advanced design for its time, featuring common-rail direct injection and a twin-turbocharger setup with an intercooler. The twin-turbo configuration was crucial for mitigating turbo lag and delivering a broad torque curve. Peak torque of 400 Nm (295 lb-ft) was available from a low 1400 rpm, providing strong pulling power for everyday driving and overtaking. The engine also benefited from a relatively high compression ratio of 16.2:1, contributing to its efficiency. The 7G-TRONIC PLUS automatic transmission, a seven-speed unit, was specifically tuned to complement the engine’s characteristics. It offered smooth and quick shifts, and included a manual shift mode for greater driver control. The transmission’s gear ratios were optimized for both fuel economy and acceleration, with a relatively tall final drive to enhance highway cruising efficiency.
Driving Characteristics
The GLK 220 CDI, while not a performance-oriented vehicle, offered a surprisingly capable driving experience. The 170 horsepower and 400 Nm of torque provided adequate acceleration, with a 0-60 mph time of around 8.3 seconds. The engine’s strong low-end torque made it feel more powerful than its horsepower figure suggested, particularly in everyday driving situations. The 7G-TRONIC PLUS transmission contributed to a smooth and refined driving experience, with seamless gear changes. Compared to the more powerful GLK 350 models, the 220 CDI prioritized fuel economy and comfort over outright performance. Manual transmission options were not available for this engine configuration. The rear-wheel drive configuration, standard on this model, provided a balanced feel, although all-wheel drive (4MATIC) was available as an option for improved traction.
Equipment & Trim Levels
The GLK 220 CDI typically came well-equipped, reflecting its position as a premium vehicle. Standard features included automatic climate control, a multi-function steering wheel, power-adjustable front seats, and a high-quality audio system. Interior upholstery was typically a combination of leatherette and fabric, with full leather options available as an upgrade. The dashboard featured a classic Mercedes-Benz design, with a prominent central display screen for infotainment and vehicle settings. Optional extras included a panoramic sunroof, navigation system, parking assist, and upgraded sound systems. Trim levels varied slightly depending on the market, but generally offered packages that bundled together popular options.
Chassis & Braking
The GLK 220 CDI featured a robust chassis designed to provide a comfortable and secure ride. The front suspension utilized a McPherson strut setup with coil springs and an anti-roll bar, while the rear suspension employed an independent multi-link design, also with a stabilizer bar. This configuration provided a good balance of ride comfort and handling. Braking duties were handled by ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) was standard, along with electronic brake-force distribution. The GLK 220 CDI’s weight, around 1770 kg (3902 lbs), was relatively moderate for its class, contributing to its manageable handling characteristics.
Market Reception & Comparison
The GLK 220 CDI was generally well-received by automotive critics, who praised its fuel efficiency, comfortable ride, and refined interior. However, some critics noted that its performance was not as exhilarating as some of its competitors. Compared to the GLK 350, the 220 CDI offered significantly better fuel economy – around 5.6-6 l/100 km (42-39.2 US mpg) – but at the expense of acceleration. The 220 CDI also offered a more affordable entry point into the GLK range. Against rivals like the BMW X3 and Audi Q5, the GLK 220 CDI held its own in terms of refinement and features, but often lagged slightly in terms of driving dynamics.
Legacy
The OM651 engine family, used in the GLK 220 CDI, has proven to be remarkably durable and reliable. With proper maintenance, these engines can easily exceed 200,000 miles. The 7G-TRONIC PLUS transmission is also known for its longevity. On the used car market, the GLK 220 CDI remains a popular choice for buyers seeking a reliable and fuel-efficient luxury SUV. While it may not have the prestige of some other Mercedes-Benz models, its combination of practicality, comfort, and affordability has ensured its continued appeal. Common issues reported with these vehicles include occasional problems with the diesel particulate filter (DPF) and the glow plug system, but these are generally manageable with regular maintenance.
