Starting today, Mercedes-Benz is offering a four-cylinder, diesel engine for the GLK compact crossover in United States.

It's the GLK250 Bluetec 4Matic model which comes with a 4-cylinder, 2.1-liter twin-turbo engine generating 201 bhp (150 kW) and 369 lb-ft (500 Nm) of torque, connected to a 7-speed automatic transmission. Mercedes-Benz is selling the model exclusively in a four-wheel drive configuration from 39,459 USD.

According to Bart Herring head of product management for United States, the diesel GLK is 20-30 percent more economical than a gasoline-powered variant. It will do 24 mpg city / 33 mpg highway which is considerably better than the V6 3.5-liter inside the GLK350 that returns 19 mpg city / 24 mpg highway.

The engine will replace the V6 3.0-liter diesel inside the 2014 E-Class facelift this September while in 2015 it will be used for the new C-Class.

Gallery: Mercedes-Benz GLK with 4-cylinder, 2.1-liter twin-turbo diesel goes on sale in U.S.

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