Genuine OEM Mercedes-Benz Fuel Tank Cap, part number A0004704500. This cap is designed to securely seal the fuel tank opening, preventing the escape of fuel vapors and ingress of contaminants like dirt and moisture. It is constructed from robust, fuel-resistant materials to ensure longevity and safety. A proper seal is essential for emissions control and preventing fuel loss. Genuine OEM fuel tank caps provide the exact fit and sealing required for optimal performance and safety.