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Mercedes-Benz C63 AMG

Message to the 2008 BMW M3, don't go thinking you're a shoo-in for the world's next lower-case supercar. Mercedes just kicked out its entry AMG, the C63, and it's likely a screamer-in-waiting. Powered by AMG's most recent feat — a 6.2-liter naturally aspirated V8 with enough grunt to unseat Zeus's dental work — the…