The future Mercedes SLS Roadster has been caught testing again, this time somewhere in Germany. The new sports roadster will debut at the 2011 Frankfurt Motor Show and will go on sale at the end of 2011.

Known internally as the R197, the SLS Roadster will remain faithful to the coupe version, but it will drop the gullwing doors. The roadster version is powered like the coupe version by a 6.3-liter V8 engine with 563 HP and 479 lb-ft of torque. However, being a much heavier model, it will rocket from 0 to 60mph in 4.0 seconds before topping out at approximately 192 mph.

The SLS Roadster will come with a canvas roof that will make it shorter than the coupe. The all electric roof system will include a glass rear screen and will fold neatly under the rear deck. Expect the roadster version to go on sale at a price of approx $200k.

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