The next Mercedes SLK AMG has been caught testing for the first time. The future model is codenamed R172 and will be inspired by the F800 Concept unveiled at this year's Geneva Motor Show. The car will feature a large, trapezoidal front grille similar to the one from the SLS AMG supercar, a rear spoiler also similar to the one from the SLS ,and a new side vent. There are also larger wheels and brakes, a more aggressive air intake on the front spoiler, and quad-exhaust tips.

The car will replace the current SLK55 and will most likely be powered by the same V8 engine found in the C63 AMG that delivers a total of 457bhp.

However, before the AMG version, we will see the standard SLK Roadster->ke1683 go on sale in April 2011. It will be offered with a diesel engine and a four-cylinder 2.1 twin-turbo engine producing 204 hp and 500 Nm.

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