This manual provides comprehensive factory service and repair information for the 1999 540i, chassis code E39. Powered by a 4.4-liter V8 engine producing approximately 282 horsepower and 324 lb-ft of torque, this luxury sedan offers a refined driving experience with standard features like ABS and traction control, and optional side airbags. Known for its advanced chassis and driving dynamics, the E39 generation, produced in Dingolfing, Germany, earned accolades such as Car and Driver's 10Best. This manual is designed for owners, DIY enthusiasts, and professional technicians seeking in-depth knowledge for maintenance and repair. The scope of this manual covers all essential aspects of the 540i, including detailed engine service, transmission repair for both automatic and manual options, brake system, electrical diagnostics with wiring diagrams, and suspension and steering systems. It also addresses cooling, fuel, and emission systems, as well as interior components, climate control, and restraint systems. With step-by-step instructions, troubleshooting guides, and advanced diagnostic procedures, this resource empowers users to perform general maintenance, periodic lubrication, and complex repairs, ensuring the longevity and optimal performance of their vehicle.