State-of-the-art powerplants ensure an exceptionally high level of ride comfort and impressive performance right across the GLK range. Plus fuel-consumption figures are low, as is the emission count. Customers have a choice of four model variants: diesel aficionados can opt for the GLK 220 CDI BlueEFFICIENCY or GLK 320 CDI, while those with a preference for petrol can select the GLK 280 or GLK 350, both of which feature a V6 powerplant.

In the GLK 220 CDI BlueEFFICIENCY, the all-new diesel engine generation posts an excellent set of figures. Like the V6 unit in the GLK 320 CDI, the four-cylinder engine with a displacement of 2.2 litres and an output of 125 kW/170 hp reflects the dynamism of the GLK concept as a whole and produces impressive performance coupled with lower fuel consumption and reduced emissions. Torque is equally impressive, with some 400 newton metres available across a broad engine speed range of 1400 to 2800 rpm. Technical highlights of the exceptionally compact and smooth-running CDI powerplant with rear camshaft drive include fourth-generation common-rail direct injection with an injection pressure of 2000 bar and a two-stage turbocharger system. The state-of-the-art powerplant propels the GLK from 0 to 100 km/h in just 8.8 seconds and on to a top speed of 205 km/h. The compression-ignition engine with extremely low untreated emissions delivers exceptional environmental performance and, like all diesel engines for Mercedes passenger cars, features exhaust gas recirculation, an oxidising catalytic converter and a maintenance-free diesel particulate filter as standard. In addition, the engine developers have succeeded in reducing untreated emissions by a decisive margin. The smooth-running four-cylinder unit consumes a mere 6.9 litres of diesel per hundred kilometres, emits just 183 grams of CO2 per kilometre and already meets the requirements of the EU5 emission standard. The diesel line-up is augmented by the proven V6 powerplant in the GLK 320 CDI, which develops 165 kW/224 hp and achieves a peak torque of 540 newton metres, enabling the GLK to perform even more admirably: here the top speed is 220 km/h whilst acceleration from 0 to 100 km/h takes just 7.5 seconds. The V6 engine also features exhaust gas recirculation, an oxidising catalytic converter and a maintenance-free diesel particulate filter. Diesel consumption is a mere 7.9 litres per hundred kilometres. Plus the engine complies with the Euro 4 standard.

The two smooth-running V6 petrol models - the GLK 280 and the GLK 350 - develop 170 kW/231 hp and 200 KW/272 hp respectively, all of which makes for rapid performance. Yet fuel consumption is only moderate. The 3.5-litre V6 in the Mercedes-Benz GLK 350 4MATIC stands out in particular, achieving figures similar to those of a sports car. It has a top speed of 230 km/h and races from 0 to 100 km/h in 6.7 seconds. Both engines also comply with the Euro 5 standard, consuming 10.2 litres and 10.4 litres per hundred kilometres respectively.

All of the engine variants for the GLK are matched with the 7G-TRONIC 7-speed automatic transmission as standard. But the exceptional performance and low fuel consumption are not just down to the perfect combination of the highly sophisticated engines with the 7G-TRONIC and the friction-optimised powertrain. Further key factors include the relatively low overall weight (GLK 280: 1830 kg) and the exceptional aerodynamics for a vehicle of this design (cd figure 0.35).