This manual covers MAN Marine Diesel Engines from the D2848, D2840, and D2842 series, including variants LXE, LE, LYE, and LZE, with model codes ranging from 401 to 413. These engines are engineered for robust performance and reliability in marine applications. This comprehensive workshop service and repair manual provides detailed information essential for understanding, maintaining, and servicing these powerful diesel engines. The purpose of this manual is to serve as a definitive guide for owners, mechanics, and technicians. It encompasses a wide range of topics, including detailed maintenance procedures, troubleshooting guidance, technical specifications, and essential safety information. With clear, step-by-step instructions, zoomable illustrations, exploded views, and component breakdowns, this manual ensures that all aspects of engine upkeep, from routine service to complex repairs, can be performed effectively and efficiently.