This comprehensive service manual provides detailed instructions and guidance for repairing and maintaining your Mercedes-Benz W124 300E E320 3.0L from 1986 to 1990. It covers a wide range of topics, from routine maintenance tasks like changing the air filter or checking tire pressure, to more complex procedures like engine overhauls, timing belt replacements, and head gasket repairs. The manual is designed to be easy to use, with numbered instructions, detailed illustrations, and clear explanations. Enhanced visuals are used to highlight important parts and provide a clear understanding of each repair process. Additionally, the manual includes troubleshooting sections and electrical service procedures with detailed wiring diagrams for diagnosing and resolving electrical issues. This manual is an invaluable resource for both DIY enthusiasts and professional mechanics, providing the information needed to perform repairs confidently and effectively. It serves as a comprehensive reference guide for all aspects of your vehicle's maintenance and repair.

The Mercedes-Benz W124 300E, later known as the E320, is a true icon of automotive engineering, produced from 1986 to 1990. This mid-size executive sedan, boasting a 3.0-liter naturally aspirated inline-six engine, defined the era of luxurious, robust, and reliable German engineering. The "E" designation denoted a "European" trim level, featuring a more luxurious interior compared to the "American" 300E. The 300E introduced a groundbreaking multi-link rear suspension, providing exceptional handling and stability. Its aerodynamically efficient body design, characterized by large taillights and a distinctive grille, contributed to its sleek and timeless aesthetic. Beyond its powerful engine and sophisticated suspension, the W124 300E offered a level of comfort and refinement rarely seen at the time. From its plush leather upholstery and wood-trimmed interior to its advanced air conditioning system and electronically controlled power windows, every detail reflected the meticulous attention to quality that Mercedes-Benz was known for. Its sturdy construction and robust engine translated into exceptional durability and longevity, with many examples still in excellent condition today, testament to their reputation for lasting power and resilience. The W124 300E/E320 remains a highly sought-after classic, appealing to both enthusiasts and collectors who appreciate its blend of performance, comfort, and timeless elegance. Its enduring popularity is a testament to its exceptional build quality, understated style, and legendary reliability.