Market Segment:
Executive Sedan/Wagon
Premium Features:
Known for its sophisticated design, strong build quality, and advanced engineering for its era.
Key Competitors:
BMW 5 Series, Mercedes-Benz E-Class, Volvo 900 Series, Lexus ES.
Design Philosophy:
Aerodynamic styling, spacious interior, and refined ride quality characteristic of Audi's mid-luxury offerings.
All Wheel Drive:
Optional and highly regarded Quattro all-wheel-drive system providing exceptional traction and handling.
Engine Mechanical:
Complete overhaul, diagnostics, timing belt replacement, lubrication system, cooling system.
Engine Performance:
Fuel injection system (KE-Jetronic/LH-Jetronic), ignition system, emission control systems.
Transmission:
Manual and Automatic transmission overhaul, diagnostics, fluid specifications, shift linkage adjustment.
Drivetrain:
Front-wheel drive and Quattro all-wheel drive systems, differential, CV joints, driveshafts.
Brakes:
Hydraulic system, ABS (Anti-lock Braking System), disc and drum brake servicing, bleeding procedures.
Suspension:
Front and rear suspension components, alignment specifications, shock absorber replacement, control arm servicing.
Steering:
Power steering system, steering rack and pump servicing, tie rod ends.
Electrical System:
Wiring diagrams, component testing, alternator, starter motor, battery, fuses, relays.
Body And Chassis:
Body panel removal and installation, door mechanisms, glass replacement, chassis lubrication, rust prevention.
HVAC:
Heating, ventilation, and air conditioning (HVAC) system servicing, refrigerant handling, component replacement.
Routine Maintenance:
Oil changes, filter replacements, spark plug replacement, fluid checks and top-offs, belt inspection.
Troubleshooting:
Diagnostic flowcharts, symptom-based troubleshooting for engine, electrical, and mechanical issues.
Repair And Rebuild:
Step-by-step instructions for component repair, overhaul, and replacement of major and minor parts.
Diagnostics:
OBD-I (On-Board Diagnostics) procedures, fault code retrieval, sensor testing, actuator testing.
Adjustment:
Valve adjustment, timing belt tension, idle speed adjustment, clutch adjustment.
Installation:
Component installation procedures, accessory fitting, timing belt installation.
Depth Of Information:
Comprehensive; covers everything from basic maintenance to full engine and transmission rebuilds.
Diagnostic Capabilities:
Advanced diagnostic procedures, including electronic system analysis and mechanical testing.
Specification Detail:
Includes detailed torque specifications, clearances, fluid capacities, and electrical values.
Oil Change Interval:
Every 7,500 miles or 12 months, whichever comes first.
Timing Belt Replacement:
Every 60,000 miles or 5 years.
Spark Plug Replacement:
Every 30,000 miles.
Engine Oil:
API SJ, SAE 5W-40 or 10W-40 (check manual for specific climate recommendations).
Coolant:
G11 (Blue/Green) Ethylene Glycol based coolant. Capacity: 8.0 Liters (approx).
Transmission Fluid Auto:
G 052 162 A1 (ATF Dexron II or equivalent). Capacity: 7.0 Liters (approx. for drain/refill).
Transmission Fluid Manual:
GL-5, SAE 75W-90 Gear Oil. Capacity: 2.0 Liters (approx).
Power Steering Fluid:
G 002 000 (Pentosin CHF 11S or equivalent).
Timing Belt Wear:
Critical component; failure can cause catastrophic engine damage. Adherence to replacement schedule is vital.
Fuel Injector Seals:
Can degrade over time, leading to fuel leaks or rough idling.
ABS Sensor Failure:
ABS warning light may illuminate due to faulty wheel speed sensors or ABS control module.
Climate Control Actuators:
Vacuum or electric actuators for HVAC flaps can fail, affecting air distribution.
Window Regulator Failure:
Common wear item, leading to inoperative power windows.
Coil Packs And Distributor:
Ignition system components can fail, causing misfires and poor running.
Audi Legacy:
Audi, a German manufacturer, has a long history of engineering innovation and premium vehicle production, dating back to the early 20th century.
C4 Generation:
The C4 platform (1991-1994) represented a significant update over the C3, featuring a more modern, smoother design and improved aerodynamics.
Audi 100 Legacy:
The Audi 100 was Audi's flagship model, positioned as a direct competitor to other European luxury sedans. It was also sold as the Audi 100 Avant (wagon).
Production Years:
1991-1994 (C4 generation)
Manufacturing Location:
Germany