2021 Mercedes-AMG C63 Costs. Via: Daimler. The 2021 Mercedes-AMG range starts at $68,600 for the C63 sedan. Next up, you have the C63 Coupe, priced at $70,650. The C63 S Sedan and Coupe have sticker prices of $76,200 and $78,250, respectively. The swanky Cabriolet versions cost $78,000 (standard) and $85,600 (C63 S). Browse the best January 2024 deals on 2019 Mercedes-Benz C-Class C AMG 63 S Cabriolet RWD vehicles for sale. Save $9,548 this January on a 2019 Mercedes-Benz C-Class C AMG 63 S Cabriolet RWD on CarGurus. i4ZEk.