M276 Service Bulletin PDF

A service bulletin that addresses rattling noise issues after engine start for several Mercedes-Benz models. It identifies the problem as originating from secondary timing chains and recommends the installation of check valves and chain tensioners as a remedy. The document provides step-by-step instructions on the parts to install, including check valves and specific chain tensioners, depending on the engine type. Details about part numbers, validation, and installation notes are included to ensure the correct application of the remedy. The bulletin also includes troubleshooting tips and emphasizes checking the oil supply opening in cylinder heads.