The Haynes Mercedes Benz Diesel 123 Series Repair Manual 1976 Thru 1985 4 & 5 Cyl is a comprehensive service and repair manual specifically designed for Mercedes-Benz vehicles with 4 and 5 cylinders, covering the years 1976 through 1985. Published by Haynes in the United States, this manual offers detailed instructions and diagrams to guide users in maintaining and repairing their diesel vehicles. It is a valuable resource for Mercedes-Benz owners looking to service and upkeep their vehicles on their own or with the assistance of a mechanic.