This comprehensive Mercedes 420SEL 1986-1991 Service Repair Manual is a valuable resource for mechanics and car owners alike. It provides detailed instructions and illustrations to guide you through a wide range of repair and maintenance procedures, ensuring you can keep your classic Mercedes running smoothly. The manual covers all model years from 1986 to 1991, offering a complete guide for various aspects of your vehicle. From routine maintenance tasks like oil changes and filter replacements to more complex repairs involving the engine, transmission, suspension, brakes, and electrical systems, this manual has you covered. With its in-depth coverage, you'll find detailed instructions on: * **Inspecting and Maintaining Components:** Learn how to thoroughly examine the condition of various components, including lines, hoses, and suspension elements. The manual also guides you on inspecting for water leakage and corrosion. * **Engine and Transmission Repair:** Gain expertise on procedures like adjusting valve clearance, checking and adjusting idle speed, replacing fuel filters, and performing oil changes for both manual and automatic transmissions. * **Suspension and Steering:** This manual provides guidance on inspecting and adjusting the self-leveling suspension, checking front and rear axle oil levels, and inspecting and rotating wheels, ensuring a smooth and safe ride. * **Brakes and Steering Systems:** Learn how to check brake fluid levels, inspect brake lines, replace brake fluids, and adjust the parking brake. You'll also find instructions for inspecting the steering system, including checking steering play and retightening bolts. * **Electrical and Cooling Systems:** The manual covers procedures like checking and correcting battery fluid levels, inspecting warning and indicator lamps, and replacing dust, active charcoal, and recirculating air filters. You'll also find guidance on maintaining the cooling system, including checking coolant levels and replacing coolant. * **Body and Interior:** This manual includes instructions on cleaning water drains, lubricating door hinges and locks, inspecting safety belts, and maintaining the sunroof, soft top, and folding side mirrors. This manual is a valuable investment for any Mercedes 420SEL owner or mechanic, offering a wealth of information to help you diagnose problems, perform repairs, and maintain your vehicle to the highest standards.

The Mercedes-Benz 420 SEL, produced from 1986 to 1991, represents a pinnacle of luxury and engineering prowess in the automotive world. This flagship sedan, part of the W126 model series, was designed to cater to discerning drivers seeking the ultimate blend of comfort, performance, and prestige. Under the hood, the 420 SEL housed a potent 4.2-liter V8 engine capable of generating 215 horsepower, enabling effortless acceleration and smooth power delivery. This engine was paired with a 4-speed automatic transmission, providing seamless gear changes and effortless cruising. Beyond the powerful engine, the 420 SEL boasted a host of refined features, including a plush leather interior, ample legroom for all passengers, and a comprehensive suite of creature comforts like air conditioning, power windows, and an advanced sound system. The car’s exterior design was characterized by its stately elegance, featuring clean lines, a prominent grille, and a timeless silhouette. The Mercedes-Benz 420 SEL was a technological marvel for its era. It incorporated features that were groundbreaking for their time, including an ABS braking system, a sophisticated electronic climate control system, and a self-leveling suspension that ensured a smooth ride even on rough roads. The car's safety was also a priority, with features like crumple zones, reinforced passenger compartments, and robust safety belts providing maximum protection in the event of an accident. The 420 SEL cemented Mercedes-Benz's reputation for building durable and reliable vehicles, with many examples still on the road today, a testament to their lasting quality and timeless appeal. The 420 SEL remains a coveted classic, valued for its luxurious comfort, potent performance, and enduring elegance. It stands as a symbol of a bygone era when automotive excellence was defined by both engineering prowess and meticulous craftsmanship.