Mercedes-Benz 300SLC Concept The 2013 Mercedes-Benz 300SLC. 6.2-liter V8 and seven-speed dual-clutch automatic transmission. The V8 produces 583 horsepower and 479 pound-feet of torque in the 2013 SLS AMG GT Roadster, and 563 hp in last year’s SLS AMG. Leave a Reply Cancel ReplyYou must be logged in to post a comment.
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