The Audi 100, model code 4A, represents a significant entry in Audi's history, produced primarily in 1992. This mid-size luxury sedan and wagon, built on the Typ 4A platform, embodies Audi's commitment to sophisticated engineering, characterized by its aerodynamic 'J-design' styling and the renowned Quattro all-wheel-drive system, a standard feature on most configurations. Powered by a naturally aspirated 2.3-liter inline 5-cylinder engine, it offered a blend of performance and refined comfort, positioning itself against competitors like the BMW 5 Series and Mercedes-Benz E-Class. The model's heritage is rooted in Audi's long-standing tradition of innovation, making it a notable vehicle of its era. This comprehensive workshop service and repair manual provides detailed technical information for the Audi 100 (Typ 4A). It covers a wide range of essential maintenance procedures, including routine servicing, component replacement, and in-depth rebuilding procedures for major units like the engine and transmission. The manual also offers guidance on troubleshooting common issues, diagnosing electrical systems, and understanding technical specifications, ensuring owners and technicians can effectively maintain and repair the vehicle. Its scope extends from basic upkeep to complex repairs, making it an indispensable resource for preserving the integrity and performance of your Audi 100. 🏷️ Basic Information Identification Make: Audi Model: 100 Model Code: 4A Year: 1992 Codes Platform: Typ 4A 👋 Introduction Market Position Segment: Mid-size Luxury Sedan/Wagon Target Audience: Owners seeking DIY maintenance and repair, Independent Repair Shops Competitive Analysis Competitors: BMW 5 Series, Mercedes-Benz E-Class, Volvo 740/940 Key Features Vehicle Philosophy: Audi's focus on Quattro all-wheel drive, sophisticated engineering, and understated luxury Manual Value: Provides authoritative technical data for accurate servicing and repair 📋 Manual Details Coverage Areas Manual Type: Workshop Service and Repair Manual Language: English Format: PDF Digital Delivery: Instant Download Software Requirement: None (Standard PDF Reader) 📖 Manual Coverage Systems Covered Engine Mechanical: Complete Overhaul, Component Testing, Sealing, Timing Engine Management: Fuel Injection Systems (CIS-E, Motronic), Ignition Systems, Emissions Controls Transmission Manual: Clutch, Gearbox Overhaul, Shifting Mechanisms, Driveshafts Transmission Automatic: Transmission Overhaul, Valve Body, Torque Converter, Fluid Service Suspension: Front MacPherson Struts, Rear Independent Suspension, Bushings, Springs, Dampers Steering: Power Steering System, Steering Rack, Tie Rods, Column Brakes: Hydraulic System, ABS, Disc Brakes (Front & Rear), Parking Brake Electrical System: Wiring Diagrams, Charging System, Starting System, Lighting, Gauges, Fuses, Relays Body And Chassis: Body Repair, Panel Replacement, Doors, Glass, Seals, Chassis Components HVAC: Heating, Ventilation, Air Conditioning System Servicing and Repair Procedures Included Routine Maintenance: Oil Changes, Filter Replacements, Spark Plug Service, Fluid Checks Troubleshooting: Diagnostic Procedures, Common Fault Finding, Symptom-Based Diagnosis Component Replacement: Step-by-step guides for replacing major and minor components Rebuilding Procedures: Detailed instructions for overhauling engines, transmissions, and other major units Diagnostic Troubleshooting: On-board diagnostics (OBD) interpretation, sensor testing, actuator checks Technical Depth Depth: Comprehensive (from basic maintenance to full engine and transmission rebuilds) Detail Level: Factory-level repair procedures, specifications, and torque values 📊 Manual Specifications File Format File Type: PDF Searchability: Likely text-searchable (common for factory manuals) Printability: Printable pages Print Quality Clarity: High Resolution (typical for scanned factory manuals) Illustration Quality: Clear diagrams and illustrations Binding Type Binding: N/A (Digital Format) Paper Type Paper: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Naturally Aspirated Inline 5-Cylinder (Petrol) Engine Displacement: 2.3 Liters (2309 cc) Engine Code Common: NG Bore X Stroke: 76.4 mm x 107.0 mm Compression Ratio: 10.3:1 Performance Horsepower Ps: 133 PS (approx.) at 5500 rpm Torque Nm: 186 Nm (approx.) at 4500 rpm Fuel System Fuel Delivery: Bosch CIS-E (Continuous Injection System - Electronic) Fuel Type: Unleaded Petrol (95 RON recommended) Ignition System: Electronic Ignition with knock sensor Other Engines Engine Variants: 2.0L Inline-4 (115 PS), 2.0L 16V Inline-4 (140 PS), 2.8L V6 (174 PS), 2.3L 20V Inline-5 Turbo (220 PS - S2/RS2 derived) 🔧 Transmission Standard Standard Transmission: 5-Speed Manual Optional Optional Transmission: 4-Speed Automatic (ZF 4HP22) Features Drivetrain: Quattro All-Wheel Drive (Standard on most models) Manual Transmission Fluid: API GL-4 Gear Oil (e.g., Castrol EPX 80W-90) Automatic Transmission Fluid: G 052 162 A2 (or equivalent Dexron III) 📐 Dimensions Exterior Body Styles: 4-Door Sedan, 5-Door Avant (Wagon) Length Mm: 4790 mm (Sedan) Width Mm: 1777 mm Height Mm: 1420 mm (Sedan) Weights Curb Weight Kg: 1390 - 1550 kg (depending on configuration) Gross Vehicle Weight Rating Kg: Approximately 1950 - 2050 kg 🛡️ Safety Features Ratings Crash Test Information: Limited official crash test data available for this vintage, but known for robust body structure. Active Features ABS: Anti-lock Braking System (ABS) available on most models Traction Control: Traction control (ASR) became available later in the generation, less common for 1992 models. Passive Features Airbags: Driver's side airbag standard on many 1992 models, passenger airbag optional/later addition. Seatbelts: Front and rear seatbelts, pre-tensioners on front belts 💡 Technology Features Infotainment Audio System: Factory Audi radio/cassette player with amplifier, optional CD player. Climate...