The CL350 will feature a naturally-aspirated 3.5-liter V6 BlueDIRECT engine, while the CL550 gets a twin-turbo 4.6-liter V8 BlueDIRECT engine. Full details inside.

Pictures of the facelifted 2011 Mercedes CL-Class / S-Class Coupe have been "accidently" posted on the automaker's Dutch website.

While no information was released, this is our first semi-official glimpse at the premium coupe in standard and AMG -trim packages. As expected, the car features a new front bumper, revised headlights, LED fog lights, and a sportier grille.

Despite the minor exterior revisions, there are big changes under the hood. The CL350 will feature a naturally-aspirated 3.5-liter V6 BlueDIRECT engine with 306 PS (301 bhp / 225 kW) and 368 Nm (272 lb-ft) of torque, while the CL550 gets a twin-turbo 4.6-liter V8 BlueDIRECT engine with 435 PS (429 bhp / 320 kW) and 700 Nm (516 lb-ft) of torque. In the CL63 AMG, power will be provided by 5.5-liter biturbo V8 with 544 PS (400 kW / 537 hp) and 800 Nm (590 lb-ft) or torque. The V12s will likely carryover untouched.

Look for more information to be released when the model is officially unveiled at the Paris Motor Show.

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Mercedes CL facelift images spotted on official MB site