This comprehensive service and repair manual is your definitive guide to maintaining and repairing your Mercedes 300 TD Turbo, covering all model years from 1981 to 1985. It's the same manual used by your local Mercedes dealer, offering detailed instructions and illustrations for every aspect of your vehicle. The manual provides step-by-step guidance for a wide range of procedures, from routine maintenance tasks like oil changes and filter replacements to more complex repairs. You'll find comprehensive coverage on: * **Engine:** Engine oil and filter changes, valve clearance adjustments, injection timing checks and adjustments, fuel filter replacement, air filter replacement, oxygen sensor replacement, spark plug replacement, coolant level and antifreeze protection checks, cooling system maintenance, engine stop adjustment, and engine mount bolt re-torquing. * **Transmission:** Manual transmission oil changes, manual transmission fluid level corrections, automatic transmission fluid and filter changes, automatic transmission fluid level corrections, transfer case fluid changes, transfer case fluid level corrections, clutch system fluid level checks and corrections, clutch system inspection, and throttle linkage inspection and lubrication. * **Suspension & Steering:** Self-leveling suspension inspections, front axle oil level checks and corrections, front axle ball joint inspections, rear axle oil changes, rear axle fluid level corrections, rear axle mount adjustments, wheel inspections and rotations, tire inspections, tire pressure corrections, wheel bolt tightening, drive shaft flexible coupling inspections, and steering system checks. * **Brakes:** Brake fluid level checks, brake line inspections, brake pad and disk thickness inspections, brake disk cleaning, parking brake cable inspections, parking brake adjustments, brake fluid replacements, brake test procedures, and parking brake checks. * **Electrical System:** Power steering fluid level checks, steering play checks, steering bolt re-tightening, fuel system condition checks, exhaust flange re-tightening, exhaust system connection re-tightening, battery fluid level checks, warning and indicator lamp inspections, water drain cleaning, and engine compartment lower panel removal and installation. * **Body & Interior:** Door hinge lubrication, door lock lubrication, hydraulic top fluid level checks and corrections, sunroof rail cleaning and greasing, soft top locking tab inspections, windshield washer fluid level checks and corrections, cassette deck tone head cleaning, antenna mast cleaning, headlamp and exterior lamp inspections, windshield and headlamp wiper and washer inspections, windshield wiper blade replacement, AC refrigerant charge checks, dust filter replacement for heating and ventilation, active charcoal filter replacement, recirculating air filter replacement, folding side mirror lubrication, hood lubrication, safety belt inspections, backrest lock operation checks, lower noise encapsulation panel removal and installation, and body paint damage inspections. This manual is your essential resource for keeping your Mercedes 300 TD Turbo in top condition, ensuring years of reliable performance.

The Mercedes-Benz 300 TD Turbo, produced from 1981 to 1985, was a groundbreaking vehicle that marked a pivotal moment in the evolution of diesel technology. This luxurious sedan, built upon the robust W123 platform, was the first production Mercedes to feature a turbocharged diesel engine, a feat that transformed the perception of diesel powertrains. The 3.0-liter inline-five-cylinder engine, codenamed OM617, was a marvel of engineering, offering remarkable torque and fuel efficiency. Producing 90 horsepower and a staggering 147 lb-ft of torque, the 300 TD Turbo effortlessly delivered smooth and powerful performance, making it a favorite among those seeking a blend of luxury and practicality. The 300 TD Turbo's appeal extended beyond its powertrain. The W123 chassis, renowned for its durability and comfort, provided a solid foundation for the luxurious interior. Featuring plush leather upholstery, wood trim, and a generous amount of space, the 300 TD Turbo provided an unparalleled driving experience. With its distinctive boxy styling, the 300 TD Turbo was a symbol of German engineering excellence, reflecting the era's design principles. While the exterior might appear understated by today's standards, it was a testament to the time's design aesthetic, striking a balance between elegance and functionality. The car's reputation for reliability and longevity further cemented its legacy as a true automotive icon, serving as a benchmark for future diesel-powered luxury vehicles.