Target Audience:
        
        
            Independent auto service professionals and discerning Audi 100/200 owners with mechanical aptitude.
        
     
    
    
        
            Information Source:
        
        
            Originally produced by the manufacturer for authorized dealer service departments, ensuring accuracy and completeness.
        
     
    
    
        
            Value Proposition:
        
        
            Enables owners to perform their own maintenance and repairs, significantly reducing labor costs and empowering informed decision-making with technicians.
        
     
    
        
            Usability:
        
        
            Written in clear, concise English with step-by-step instructions, diagrams, and illustrations for ease of use.
        
     
    
        
            Access:
        
        
            Digital PDF format ensures compatibility with PCs, Macs, and various mobile devices, offering convenient access.
        
     
 
    
    
    
        
            Engine Mechanical:
        
        
            Detailed coverage of all engine components, including disassembly, inspection, assembly, and torque specifications.
        
     
    
        
            Engine Electrical:
        
        
            Complete wiring diagrams, troubleshooting for ignition, starting, charging systems, and accessory controls.
        
     
    
        
            Emission Control:
        
        
            Information on emissions systems, diagnosis, and adjustments for compliance with regulations of the era.
        
     
    
        
            Fuel System:
        
        
            Diagnosis, repair, and adjustment of fuel injection (K-Jetronic, CIS) or carburetor systems, fuel pumps, and lines.
        
     
    
        
            Clutch System:
        
        
            Procedures for clutch inspection, adjustment, replacement, and hydraulic system service.
        
     
    
        
            Manual Transaxle:
        
        
            Detailed repair and overhaul instructions for manual gearboxes, including component replacement and lubrication.
        
     
    
        
            Automatic Transaxle:
        
        
            Service and repair procedures for automatic transmissions, including fluid changes, adjustments, and overhaul.
        
     
    
        
            Driveshaft Axle:
        
        
            Inspection, maintenance, and repair of driveshafts, CV joints, and associated components.
        
     
    
        
            Suspension System:
        
        
            Maintenance and repair of front and rear suspension components, alignment specifications, and troubleshooting.
        
     
    
        
            Steering System:
        
        
            Diagnosis and repair of power steering systems, steering rack, tie rods, and steering column.
        
     
    
        
            Brake System:
        
        
            Detailed information on brake components, hydraulic systems, disc and drum brake service, and ABS (if equipped).
        
     
    
        
            Body Interior Exterior:
        
        
            Procedures for body panel repair, trim replacement, door and window mechanisms, and interior component servicing.
        
     
    
        
            Body Electrical:
        
        
            Wiring diagrams and troubleshooting for lighting, power windows, central locking, and other body electrical functions.
        
     
    
        
            HVAC System:
        
        
            Service and repair for heating, ventilation, and air conditioning systems, including refrigerant handling.
        
     
    
        
            Restraint System:
        
        
            Information on seat belts and passive restraint systems of the era.
        
     
    
    
        
            Diagnostic Procedures:
        
        
            Step-by-step troubleshooting guides for common and complex issues across all vehicle systems.
        
     
    
        
            Maintenance Procedures:
        
        
            Scheduled maintenance tasks, fluid checks, filter replacements, and tune-up procedures.
        
     
    
        
            Repair Procedures:
        
        
            Detailed instructions for component removal, disassembly, inspection, repair, reassembly, and installation.
        
     
    
        
            Overhaul Procedures:
        
        
            Complete overhaul instructions for major components such as engines, transmissions, and differentials.
        
     
    
        
            Calibration Adjustments:
        
        
            Procedures for setting ignition timing, fuel mixture, idle speed, and other critical adjustments.
        
     
    
        
            Wiring Diagrams:
        
        
            High-quality, integrated wiring schematics for all electrical systems.
        
     
    
    
        
            Diagnostic Capability:
        
        
            Advanced diagnostic techniques and troubleshooting flows for technicians and skilled DIYers.
        
     
    
        
            Rebuild Capability:
        
        
            Full rebuild specifications and procedures for major mechanical components.
        
     
    
        
            Specificity:
        
        
            Vehicle-specific, not generic; includes exact specifications and procedures for the Audi 100/200 of the 1980 model year.
        
     
    
        
            Diagram Quality:
        
        
            Includes diagrams, illustrations, and schematics essential for understanding complex procedures.
        
     
 
    
    
    
        
            Engine Variants Covered:
        
        
            Likely includes 4-cylinder (e.g., 1.6L, 1.8L, 2.0L) and 5-cylinder (e.g., 2.1L, 2.2L) petrol engines.
        
     
    
    
        
            Power Output Range:
        
        
            Approximately 75-130 hp depending on engine displacement and configuration.
        
     
    
        
            Torque Output Range:
        
        
            Varies by engine, typically 120-180 Nm.
        
     
    
    
        
            Fuel Delivery Systems:
        
        
            Carbureted or Bosch K-Jetronic (CIS) fuel injection systems.
        
     
    
        
            Fuel Type:
        
        
            Unleaded gasoline (petrol).
        
     
    
    
        
            Valve Adjustment:
        
        
            Includes procedures for valve lash adjustment on applicable engine variants.
        
     
    
        
            Timing Belt Chain:
        
        
            Covers timing belt or chain inspection, tensioning, and replacement procedures.
        
     
 
    
    
    
        
            Standard Transmission Type:
        
        
            4-speed or 5-speed Manual Transaxle
        
     
    
    
        
            Optional Transmission Type:
        
        
            3-speed or 4-speed Automatic Transaxle
        
     
    
    
        
            Drivetrain:
        
        
            Front-wheel drive (FWD) is standard; Audi's iconic quattro all-wheel drive (AWD) system was introduced during this generation and may be covered for specific models.
        
     
    
    
        
            Transmission Fluid Type Manual:
        
        
            API GL-4 Gear Oil (Specific viscosity like 75W-90 or 80W-90 recommended, refer to manual for exact specs).
        
     
    
        
            Transmission Fluid Type Automatic:
        
        
            Dexron III or equivalent automatic transmission fluid (ATF).
        
     
 
    
    
    
        
            Oil Change Interval:
        
        
            Typically every 5,000-10,000 km or 6-12 months, depending on driving conditions and oil used (refer to manual for specifics).
        
     
    
        
            Spark Plug Replacement:
        
        
            Approximately every 20,000-30,000 km, or as specified by plug type.
        
     
    
        
            Air Filter Replacement:
        
        
            Every 15,000-25,000 km or annually.
        
     
    
    
        
            Engine Oil Type:
        
        
            SAE 10W-40 or 15W-40 API SF/CD or SG/CD (Check manual for exact grade and specification).
        
     
    
        
            Coolant Type:
        
        
            Ethylene glycol based antifreeze mixed with distilled water (50/50 ratio).
        
     
    
        
            Brake Fluid Type:
        
        
            DOT 3 or DOT 4 brake fluid.
        
     
    
    
        
            Common Wear Items:
        
        
            Ignition components (distributor, coil, spark plug wires), fuel injectors/carburetor, CV joints, suspension bushings, and brake wear.
        
     
    
        
            Potential Issues:
        
        
            Rust in body panels (wheel arches, sills), fuel delivery system issues (especially with K-Jetronic), aging rubber components (hoses, seals).
        
     
 
    
    
    
        
            Audi Philosophy Of The Era:
        
        
            Audi was establishing itself as a premium manufacturer focused on engineering, comfort, and advanced technology (like FWD and later Quattro).
        
     
    
    
        
            C2 Generation Introduction:
        
        
            The C2 generation (Type 43) was launched in 1976 and replaced the C1 generation. The 1980 model year represents a mature phase of this generation.
        
     
    
        
            Audi 100 200 Distinction:
        
        
            The Audi 200 was essentially a more luxurious and powerful variant of the 100, often featuring larger engines and premium appointments.
        
     
    
    
        
            Production Period:
        
        
            The C2 generation was produced from 1976 to 1982.