This comprehensive Mercedes 190 D 2.5 Service Repair Manual provides you with everything you need to maintain, repair, rebuild, refurbish, or restore your 1986-1989 Mercedes 190 D 2.5. This manual details the same information that professional technicians and mechanics use, offering a wealth of knowledge to help you confidently tackle any repair or maintenance task. Dive into the detailed instructions, diagrams, illustrations, wiring schematics, and specifications included within this manual. It covers a wide range of topics, from basic maintenance procedures to complex repairs. You'll find step-by-step guidance for everything, including: * **Inspecting component condition** - Thoroughly examine components, lines, and hoses to ensure optimal performance. * **Suspension and body structure inspection** - Maintain the structural integrity of your vehicle and ensure proper handling. * **Engine oil and filter change** - Perform essential maintenance to keep your engine running smoothly. * **Adjusting valve clearance** - Optimize engine performance and fuel efficiency by properly adjusting valve clearance. * **Checking injection timing** - Ensure precise fuel delivery for optimal engine performance. * **Replacing fuel filter & prefilter** - Maintain fuel system cleanliness for optimal engine performance. * **Replacing air filter elements** - Ensure clean air intake for optimal engine performance. * **Checking and adjusting idle speed** - Fine-tune engine operation for smooth idling. * **Replacing oxygen sensor** - Maintain accurate fuel-air mixture for optimal engine performance and emissions. * **Replacing spark plugs** - Ensure efficient ignition and optimal combustion. * **Checking coolant level & antifreeze protection** - Maintain proper engine cooling and prevent damage from freezing. * **Adjust engine stop, retorque engine mount bolts** - Ensure proper engine operation and prevent vibrations. * **Manual transmission oil change** - Preserve transmission health and performance. * **Automatic transmission fluid and filter change** - Maintain smooth transmission operation and longevity. * **Clutch system, checking & correcting fluid level** - Ensure proper clutch operation and engagement. * **Inspecting & lubricating throttle linkage** - Maintain smooth throttle response. * **Level control, ADS, ASD, 4MATIC, fluid level** - Maintain proper suspension operation. * **Front axle, checking & correcting oil level** - Ensure smooth front axle operation. * **Checking front axle ball joints** - Maintain proper steering and suspension performance. * **Rear axle oil change** - Preserve rear axle health and performance. * **Inspecting & rotating wheels** - Extend tire life and ensure even wear. * **Inspecting tires** - Maintain proper tire condition for safe driving. * **Tightening wheel bolts** - Ensure secure wheel attachment. * **Checking brake fluid level** - Maintain proper braking system function. * **Inspecting brake lines** - Ensure proper brake fluid flow. * **Inspecting brake pads & disk thickness** - Maintain safe and effective braking. * **Replacing brake fluid** - Maintain optimal braking performance. * **Check power steering fluid level** - Ensure smooth steering operation. * **Checking steering play** - Maintain precise steering control. * **Retightening steering bolts** - Ensure secure steering system connections. * **Checking fuel system condition** - Maintain proper fuel flow and delivery. * **Retightening exhaust flange** - Prevent exhaust leaks and ensure proper system operation. * **Checking & correcting battery fluid level** - Maintain proper battery performance and longevity. * **Checking warning & indicator lamps** - Ensure proper vehicle functionality and safety. * **Cleaning water drains** - Prevent water accumulation and potential damage. * **Removing and installing engine compartment lower panel** - Access engine components for repairs or maintenance. * **Lubricating door hinges & door locks** - Maintain smooth operation and prevent squeaks. * **Hydraulic top, checking & correcting fluid level** - Ensure proper operation of convertible tops. * **Sunroof, clean & grease rails** - Maintain smooth sunroof operation and prevent leaks. * **Soft top, checking locking tabs** - Ensure proper soft top operation and security. * **Checking & correcting windshield washer fluid level** - Maintain proper windshield wiper functionality. * **Cleaning cassete deck tone head** - Improve audio fidelity. * **Cleaning antenna mast** - Ensure optimal radio reception. * **Headlamp & exterior lamp inspection** - Maintain proper lighting functionality for safety. * **Windshield & headlamp wiper & washer inspection** - Ensure clear visibility and safe driving conditions. * **Replacing windshield wiper blade** - Ensure clear windshield visibility. * **Checking & correcting AC refrigerant charge** - Maintain proper air conditioning system performance. * **Replacing dust filter for heating & ventilation** - Maintain air quality and optimal cabin comfort. * **Replacing active charcoal filter** - Eliminate odors and improve cabin air quality. * **Replacing recirculating air filter** - Maintain optimal air circulation. * **Lubricating folding side mirror** - Ensure smooth operation and prevent squeaks. * **Lubricating hood** - Ensure smooth hood operation. * **Inspecting safety belts** - Maintain proper safety belt functionality. * **Backrest lock - check operation** - Ensure safe and secure seating. * **Removing & installing lower noise encapsulation panels** - Access components for repairs or maintenance. * **Checking body for paint damage** - Identify and address any paint issues for a well-maintained appearance. This comprehensive manual is your go-to resource for all things related to your Mercedes 190 D 2.5, allowing you to confidently maintain and repair your vehicle.

The Mercedes-Benz 190 D 2.5, produced between 1986 and 1989, was a compact executive sedan that marked a significant shift in Mercedes' approach to the automotive market. This model, part of the W201 series known as the "Baby Benz," aimed to offer luxury and performance in a smaller, more affordable package. The 190 D 2.5 was powered by a 2.5-liter naturally aspirated diesel engine, producing 75 horsepower and 127 lb-ft of torque. Though not known for its speed, the engine's fuel efficiency and robust reliability were highly appreciated by those seeking a practical and economical daily driver. The 190 D 2.5 boasted a refined interior with high-quality materials, offering a level of comfort and features typically associated with larger Mercedes models. The car's handling was praised for its precise and responsive nature, and its compact size made it agile and easy to maneuver in city traffic. A notable feature was the "Hydrak" self-leveling rear suspension, which ensured a comfortable ride regardless of load. The 190 D 2.5 was a testament to Mercedes' commitment to engineering excellence, even in a smaller and more affordable vehicle segment. It appealed to a wide range of drivers seeking a well-rounded blend of practicality, reliability, and premium quality, contributing to the 190 series' enduring popularity and influence within the automotive industry.