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This serpentine belt kit, including the tensioner and idler pulley, is a high-quality replacement for the Mercedes-Benz C300, engineered to meet OEM specifications for fit, durability, and performance. The kit drives essential engine accessories such as the alternator, water pump, and power steering pump while maintaining proper belt tension. Made from durable materials, the belt and components ensure long-lasting operation, reduce slippage, and prevent premature wear. Easy to install, this kit is the ideal solution for replacing worn or failing serpentine belt components, restoring smooth engine function and reliable performance in your Mercedes-Benz C300.