Precision-engineered timing expansion plug cover for Mercedes-Benz M271/M274 engines and compatible models including W204, W212, W211, C207, R172, W164, W251 series. Manufactured with high-grade aluminum alloy for superior heat dissipation and corrosion resistance, featuring CNC-machined sealing surface for perfect fitment. OEM-equivalent replacement (part number 0009976220) with improved pressure tolerance and vibration damping properties. Direct-fit solution for timing chain cover maintenance, preventing oil leaks and debris intrusion. Includes precision-molded rubber gasket for airtight seal. Ideal for professional mechanics and DIY enthusiasts performing timing system repairs. Ships in bulk quantities with wholesale pricing for automotive workshops and parts distributors.