This manual covers the Mercedes-Benz 180D, 180Db, and 180Dc models, primarily associated with the W121 chassis. Produced during the mid-to-late 1950s through the early 1960s, these vehicles represent a significant part of Mercedes-Benz's post-war automotive history. Known for their robust engineering, reliable diesel engines (OM621 family), and distinctive 'Ponton' styling, these cars offered a blend of durability, comfort, and quality that cemented Mercedes-Benz's reputation. They competed in the executive sedan market, offering advanced features for their time and a focus on long-term dependability.

This workshop service manual provides comprehensive guidance for the maintenance, diagnosis, and repair of your Mercedes-Benz 180D, 180Db, or 180Dc. It covers all major systems, including the engine, transmission, brakes, suspension, and electrical systems, detailing procedures from routine maintenance and fluid changes to complete engine overhauls. This manual is an essential resource for owners, mechanics, and technicians, offering detailed specifications, troubleshooting guides, and step-by-step instructions to ensure the longevity and proper functioning of these classic vehicles.