Engine Mechanical:
        
        
            Engine system diagnostics, repair, overhaul, including cylinder head, block, crankshaft, pistons, connecting rods, timing, valve train, lubrication system, cooling system.
        
     
    
        
            Engine Fuel System:
        
        
            Fuel charging and controls, fuel injection systems (e.g., K-Jetronic, KE-Jetronic, Motronic), fuel pump, injectors, fuel filter, throttle body, fuel pressure regulation.
        
     
    
        
            Ignition System:
        
        
            Engine ignition system, distributor, ignition coils, spark plugs, ignition control module.
        
     
    
        
            Emission Control:
        
        
            Engine emission control, emissions systems, catalytic converter, oxygen sensors, EGR system, intake air distribution, evaporative emission control.
        
     
    
        
            Electronic Engine Control:
        
        
            Electronic Engine Controls (EEC) diagnostics, sensor inputs, actuator outputs, ECU operation, wiring diagrams specific to engine management.
        
     
    
        
            Transmission Manual:
        
        
            Manual transmission repair, overhaul, clutch controls, linkage, gear selection, internal components.
        
     
    
        
            Transmission Automatic:
        
        
            Automatic transmission repair, overhaul, hydraulic controls, torque converter, valve body, shift solenoids, control systems.
        
     
    
        
            Driveline:
        
        
            Driveline system, driveshaft, constant velocity (CV) joints, differential, axle shafts, wheel bearings.
        
     
    
        
            Suspension:
        
        
            Suspension system, front and rear suspension components, shock absorbers, springs, control arms, bushings, anti-roll bars.
        
     
    
        
            Steering:
        
        
            Steering system, steering rack, power steering pump, hoses, steering column, linkage.
        
     
    
        
            Brakes:
        
        
            Brake system, hydraulic components, master cylinder, brake lines, calipers, brake pads, rotors, parking brake, Anti-Lock Control (ABS) system.
        
     
    
        
            Wheels Tires:
        
        
            Wheel and tyre information, specifications, mounting, balancing, alignment.
        
     
    
        
            Electrical System:
        
        
            Electrical distribution, battery, charging system (alternator, regulator), starting system (starter motor), wiring diagrams for all circuits.
        
     
    
        
            Lighting:
        
        
            Lighting system, headlights, taillights, interior lights, bulb types and replacement.
        
     
    
        
            Instrumentation:
        
        
            Instrument and Warning Systems, dashboard instruments, gauges, warning lights, sensor inputs.
        
     
    
        
            Climate Control:
        
        
            Climate Control System, air conditioning, heating, ventilation, air distribution, control components, refrigerant systems.
        
     
    
        
            Body Exterior:
        
        
            Body System, body panels, bumpers, doors, hood, trunk, fenders, glass, frames, mechanisms, mirrors, roof.
        
     
    
        
            Body Interior:
        
        
            Interior Trim, seating, instrument panel, console, door panels, headliner.
        
     
    
        
            Body Repairs:
        
        
            Body repairs, metal repairs, subframe and mounting system, structural repairs.
        
     
    
        
            Safety Features:
        
        
            Safety Belt System, airbags (if equipped), other passive safety features.
        
     
    
        
            Comfort Features:
        
        
            Information and Entertainment Systems, power windows, power locks, cruise control (speed control), wipers and washers.
        
     
    
    
        
            Routine Maintenance:
        
        
            Routine maintenance procedures, fluid changes, filter replacements, spark plug inspection, belt checks.
        
     
    
        
            Troubleshooting:
        
        
            Diagnostic procedures and troubleshooting guides for various systems, including common problems and their solutions.
        
     
    
        
            Component Repair:
        
        
            Detailed repair and overhaul procedures for all major mechanical and electrical components.
        
     
    
        
            Electrical Diagnostics:
        
        
            Electrical troubleshooting, circuit testing, use of multimeters, component testing, and comprehensive wiring diagrams.
        
     
    
        
            Jacking Lifting:
        
        
            Correct procedures for jacking and lifting the vehicle safely for maintenance and repair.
        
     
    
        
            Alignment:
        
        
            Wheel alignment specifications and procedures.
        
     
    
        
            Noise Vibration Harshness:
        
        
            NVH (Noise, Vibration, and Harshness) diagnosis and solutions.
        
     
    
    
        
            Depth:
        
        
            Dealer-level factory manual quality, covering everything from basic maintenance to complete component overhaul and advanced diagnostics.
        
     
    
        
            Diagnostic Tools:
        
        
            Information implicitly supports the use of standard automotive diagnostic tools and specialized Audi tools of the era.
        
     
 
    
    
    
        
            Oil Change Interval:
        
        
            Typically every 7,500-15,000 km (4,500-9,000 miles) or annually, depending on driving conditions and oil used. The manual will specify.
        
     
    
        
            Timing Belt Replacement:
        
        
            For engines with timing belts (many inline-5s of this era), intervals were typically around 80,000-100,000 km (50,000-60,000 miles). Crucial to verify with manual.
        
     
    
    
        
            Engine Oil Specification:
        
        
            Typically API SF/SG or higher, viscosity grade like 5W-40, 10W-40, or 15W-40 depending on climate. Manual will provide precise recommendation.
        
     
    
        
            Coolant Specification:
        
        
            G11 (Blue) or G12 (Red) coolant (or equivalent), mixed 50/50 with distilled water. Manual will specify exact type.
        
     
    
        
            Brake Fluid Specification:
        
        
            DOT 3 or DOT 4 brake fluid, depending on the ABS system requirements. Manual will provide the specific type.
        
     
    
    
        
            Common Wear Items:
        
        
            Worn engine mounts, suspension bushings, CV joint boots, fuel pump, distributor components, vacuum leaks, ABS sensor failures, and aging rubber seals/hoses.
        
     
    
        
            Turbocharger Maintenance:
        
        
            Proper warm-up and cool-down procedures are critical for turbocharger longevity. Oil supply lines and seals can be prone to failure.