🏷️ Basic Information Identification Make: Audi Model: A6 Generation: C5 Year: 1998 Codes Chassis Code: 4B2 (Sedan), 4B5 (Avant) Engine Codes Common: AEB (1.8T), AWT (1.8T), APU (2.4 V6), ALS (2.4 V6), ASM (2.8 V6), AMX (2.8 V6), AHA (2.8 V6), ACK (2.8 V6), AKE (2.5 TDI V6), BDG (2.5 TDI V6), BCY (2.7T V6 Bi-Turbo), BES (2.7T V6 Bi-Turbo), AVS (3.0 V6 - later models, but some might have appeared in late 1998 production) 👋 Introduction Market Position Target Audience: Audi A6 C5 owners (1998) with basic mechanical skills and independent auto service professionals. Competitive Analysis Advantage: Vehicle-specific information, identical to dealer-issued manuals, offering significant cost savings on repairs and maintenance. Key Features Documentation Style: Accurate, clear, concise text with diagrams, illustrations, and wiring schematics. Value Proposition: Empowers owners to perform maintenance and repairs, understand their vehicle better, and communicate effectively with technicians. 📋 Manual Details Coverage Areas Comprehensive Scope: Covers all major mechanical, electrical, and body systems. Page Count Estimated Page Count: Extensive (typical workshop manuals for this era are 1000+ pages). Manual Type Type: Service Repair Workshop Manual Language Language: English Format Digital Format: PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Engine assembly, disassembly, cylinder head, pistons, crankshaft, camshafts, timing, lubrication, cooling. Engine Electrical: Ignition system, starting system, charging system, engine sensors, ECU operation. Emission Control: Catalytic converter, secondary air injection, EVAP system, EGR (if applicable). Fuel System: Fuel pump, injectors, fuel lines, fuel pressure regulator, fuel filter, tank. Clutch System: Clutch disc, pressure plate, release bearing, hydraulic system. Manual Transaxle: Gearbox assembly, internal components, shift linkages, driveshafts, CV joints. Automatic Transaxle: Transmission types (e.g., Tiptronic), valve body, torque converter, transmission control module (TCM), fluid service. Suspension System: Front and rear suspension components (struts, shocks, control arms, bushings), alignment specifications. Steering System: Power steering pump, rack and pinion, steering column, tie rods. Brake System: Brake discs, pads, calipers, ABS system, parking brake, hydraulic lines. Body Interior Exterior: Body panel removal/installation, interior trim, seating, doors, windows, lighting. Body Electrical: Wiring diagrams, lighting, power windows, central locking, comfort features, instrument cluster. HVAC: Heating, ventilation, air conditioning system, refrigerant, components, climate control. Restraint System: Airbag system, seatbelts, SRS module. Procedures Included Maintenance: Oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt inspection/replacement. Troubleshooting: Diagnostic procedures for common faults, symptom-based troubleshooting guides. Repair Rebuild: Step-by-step instructions for component removal, overhaul, and reinstallation. Diagnostics: OBD-II diagnostic trouble codes (DTCs), sensor testing, electrical system diagnostics. Technical Depth Depth: Comprehensive; suitable for both basic owner maintenance and professional repair work. Includes detailed diagrams and schematics. 📊 Manual Specifications File Format File Type: PDF Print Quality Printability: Yes, individual pages or sections can be printed. Binding Type Binding: Not Applicable (Digital PDF) Paper Type Paper Quality: Not Applicable (Digital PDF) Software Requirements Reader: Adobe PDF Reader Compatibility Operating Systems: All Versions of Windows and Mac ⚙️ Engine Specifications Primary Engine 1.8T Engine Code: AEB, AWT Configuration: Inline 4-cylinder, turbocharged, intercooled Displacement: 1.8 Liters (1781 cc) Bore X Stroke: 81.0 mm x 86.4 mm Compression Ratio: 9.5:1 Horsepower: 150 PS (148 hp) @ 5700 rpm Torque: 210 Nm (155 lb-ft) @ 1750-4600 rpm Primary Engine 2.4 V6 Engine Code: APU, ALS Configuration: V6, naturally aspirated Displacement: 2.4 Liters (2393 cc) Horsepower: 165 PS (163 hp) @ 6000 rpm Torque: 230 Nm (170 lb-ft) @ 3200 rpm Primary Engine 2.8 V6 Engine Code: ASM, AMX, AHA, ACK Configuration: V6, naturally aspirated Displacement: 2.8 Liters (2771 cc) Horsepower: 190 PS (187 hp) @ 6000 rpm Torque: 280 Nm (207 lb-ft) @ 3200 rpm Primary Engine 2.5 Tdi V6 Engine Code: AKE, BDG Configuration: V6, turbocharged, direct injection diesel Displacement: 2.5 Liters (2493 cc) Horsepower: 150 PS (148 hp) @ 4000 rpm (AKE), 155 PS (153 hp) @ 4000 rpm (BDG) Torque: 310 Nm (229 lb-ft) @ 1750 rpm (AKE), 310 Nm (229 lb-ft) @ 1500-3000 rpm (BDG) Fuel System Fuel Type: Unleaded gasoline (RON 91 or higher for 1.8T/2.4/2.8), Diesel fuel 🔧 Transmission Standard Transmission Type: 5-speed Manual (e.g., 01E for Quattro models, 01A for FWD models) Optional Transmission Type: 5-speed Tiptronic Automatic (e.g., 5HP19) Features Drivetrain Options: Front-Wheel Drive (FWD) or quattro Permanent All-Wheel Drive 📐 Dimensions Exterior Sedan Length: Approx. 4815 mm (189.6 in) Width: Approx. 1765 mm (69.5 in) Height: Approx. 1462 mm (57.6 in) Exterior Avant Length: Approx. 4815 mm (189.6 in) Width: Approx. 1765 mm (69.5 in) Height: Approx. 1472 mm (57.9 in) Weights Curb Weight Approx: 1500-1750 kg (3300-3850 lbs) depending on engine and drivetrain 🛡️ Safety Features Ratings Crash Test Notes: While specific NHTSA/IIHS ratings for 1998 models are often not readily available in summary, the C5 platform generally performed well for its era, benefiting from Audi's focus on safety engineering. Active Features ABS: Standard Anti-lock Braking System (ABS) Esp Optional: Electronic Stability Program (ESP) available on...