The BMW 5 Series, specifically the 518 and 518i models from 1981 (chassis code E28), represents a significant entry in the executive sedan market. Known for its German engineering, driver-focused design, and robust build quality, this generation of the 5 Series offered understated luxury and reliable performance. The 518 models, powered by the M10 engine family, provided efficient and smooth operation, with the 'i' variant featuring Bosch L-Jetronic fuel injection for enhanced responsiveness. These vehicles were designed to compete with other premium sedans of the era, emphasizing a balance of comfort, handling, and practicality for everyday use.

This factory service repair manual provides comprehensive official procedures for the maintenance, diagnosis, and repair of the 1981 BMW 518 and 518i. It covers all essential systems, including detailed instructions for engine service and repair of the M10 engine, fuel and ignition systems, cooling, lubrication, and drivetrain components. Furthermore, the manual offers in-depth guidance on suspension, steering, braking systems, electrical systems, and bodywork. With its systematic troubleshooting guides and detailed technical specifications, this manual is an indispensable resource for owners, mechanics, and technicians seeking to maintain and restore these vehicles to optimal operating condition.