The Mercedes-Benz 420SEL, part of the Second Generation W126, represents a pinnacle of German engineering from the 1986-1991 model years. This full-size luxury sedan is renowned for its spacious interior, refined ride, and the robust M116 4.2L V8 engine, delivering a balance of performance and smooth operation. Building on a legacy of durability and luxury, the 420SEL offered advanced comfort and safety features for its time, solidifying its position as a benchmark in its segment against competitors like the BMW 7 Series and Jaguar XJ. Its design, influenced by a long history of automotive innovation, continues to be admired for its timeless elegance and quality craftsmanship.

This comprehensive factory workshop service repair manual provides complete factory service and repair information for the Mercedes-Benz 420SEL (W126). It covers essential systems including the engine, brakes, suspension, electrical components, and body, detailing maintenance procedures, repair and rebuild processes, and diagnostics. The manual is designed to assist owners, independent repair shops, and automotive enthusiasts in effectively maintaining and repairing their vehicles. With extensive coverage, this manual serves as an authoritative resource for understanding and servicing the unique engineering of the 420SEL.