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C5 Allroad (1999-2005) C5 (1997-2004) C4 (1994-1997)

Repair and maintenance Audi A6 C5 Allroad

  • Home
  • Audi A6
  • C5 Allroad (1999-2005)

This page contains instructions for the repair of German four-wheel drive business class cars Audi A6 Allroad with factory code "C5". These cars were produced from 1999 to 2005 with petrol engines 2.7 liters (AJK/AZA/ARE/BES, 230/250 hp), 4.2 liters (BAS, 300 hp) and diesel 2.5 liters from 150 to 180 hp

See this manual for russian, bulgarian, belarusian, ukrainian, serbian, croatian, romanian, polish, slovak, hungarian
General information
User manual
General information about Audi A6 Allroad cars
Vehicle controls
Central console
Car keys
Central lock
Full list of articles in this category »
Maintenance
Car care
Starting the engine using an auxiliary battery
Towing a car
Towing for the purpose of starting the engine of the towed vehicle
Jacking up a car
Full list of articles in this category »
Troubleshooting
Identifying and troubleshooting engine faults
Identifying and troubleshooting engine lubrication system faults
Identifying and troubleshooting engine cooling system faults
Identifying and troubleshooting gasoline injection system faults
Identifying and troubleshooting faults in the diesel engine fuel system
Full list of articles in this category »
Power unit
V6 petrol engines
General information about V6 petrol engines
Timing belt for gas distribution mechanism drive — design description
Timing Belt — Removal and Installation
V-ribbed auxiliary drive belt — design description
V-ribbed auxiliary drive belt — removal and installation
Full list of articles in this category »
V8 petrol engines
General information about V8 petrol engines
Gas distribution mechanism drive chain-design description
Timing chain — removal and installation
Camshaft Drive Chains — Removal and Installation
Auxiliary Unit Drive — Design Description
Full list of articles in this category »
Diesel engines
General information about diesel engines
Crankshaft — design description
Timing drive — design description
Timing Belt — Removal and Installation
Auxiliary Unit Drive — Design Description
Full list of articles in this category »
Cooling and heating system
Engine cooling system — design description
Coolant — draining and filling
Water pump — design description
Water pump — removal and installation
Thermostat — Removal, Installation and Checking
Full list of articles in this category »
Injection system (gasoline)
General information and precautions
Sensors and actuators of the injection system
Intake manifold and related components
Intake manifold — removal and installation
Fuel rail and related components
Full list of articles in this category »
Fuel system (diesel)
General information about the fuel system of diesel engines
How a diesel engine works
Sensors and actuators for diesel engine power supply
Operation of a diesel engine in winter conditions
High pressure fuel pump (HPFP) — removal and installation
Full list of articles in this category »
Supply system
General information and precautions
Fuel tank — design description
Fuel tank — removal and installation
Fuel tank filler neck — design description
Fuel tank filler neck — removal and installation
Full list of articles in this category »
Exhaust system
General information about the exhaust system
Exhaust system — vehicles with petrol engine
Exhaust system — diesel vehicles
Operating principle of the catalyst
EGR system components
Full list of articles in this category »
Ignition system
General information about the ignition system
Spark plugs — description and condition check
Ignition and fuel injection system — general check
Ignition switch — removal and installation
Ignition Switch — Removal and Installation
Full list of articles in this category »
Transmission
Clutch
General description of the clutch
Main components of the clutch
Clutch release parts
Clutch pedal and master cylinder
Clutch hydraulic drive components
Full list of articles in this category »
Mechanical gearbox
Gearbox — General Information
Gearbox — removal and installation
Cardan shaft — removal and installation
Speedometer sensor — removal and installation
Gearbox — Checking and filling transmission fluid
Full list of articles in this category »
Automatic gearbox
General information about automatic transmission
Automatic transmission — removal and installation
Gearbox control mechanism — design description
Gearbox control mechanism — removal and installation
Cardan shaft elements
Full list of articles in this category »
Chassis
Brake system
General information about the brake system
ABS/ESP Bosch 5.7 Elements and Their Location
ABS/ESP Bosch 5.3 Elements and Their Location
Front Wheel Brake Mechanism with FN-3 Caliper — Design Description
Front brake pads with FN-3 caliper — removal and installation
Full list of articles in this category »
Car suspension
Main elements of the front suspension
Front suspension — general information
Fastening the subframe cross brace
Front suspension parts
Shock absorber strut with air spring — removal and installation
Full list of articles in this category »
Steering
Steering — General Information
Power steering mechanism — design description
Steering wheel — removal and installation
Steering column — design description
Steering column — removal and installation
Full list of articles in this category »
Body
Body elements
Car body — general information
Safety rules for bodywork
Drying of paint coating
Engine compartment fastening and protection elements
Engine Mudguard — Removal and Installation
Full list of articles in this category »
Doors, locks and windows
Front door — removal and installation
Door trim — removal and installation
Front door glass and window lifter — removal and installation
Door lock — removal and installation
Rear Tailgate — Removal, Installation and Fitting
Full list of articles in this category »
Electrical equipment
Equipment and devices
General description and precautions
Additional electrical equipment — installation
Troubleshooting electrical equipment
Switches — Checking for Current Flow
Checking the relay
Full list of articles in this category »
Power devices
Battery in the engine compartment — removal and installation
Battery in the luggage compartment (in the spare wheel well)
Battery in the right side of the luggage compartment
Checking the electrolyte level in the battery
Checking battery voltage
Full list of articles in this category »
Electrical circuits
Diagram 4-1. Points of «mass» (-)
Schematic 4-2. Ignition switch, unloader relay terminal X, immobilizer and reverse lights relay
Diagram 4-3. Battery, starter, generator, engine start interlock relay
Diagram 4-4. Light switch, left steering column switch...
Scheme 4-5. Instrument lighting regulator, headlight optical axis tilt regulator
Full list of articles in this category »
Schemes (petrol engine 2.7 l)
Scheme 1-1. Battery, starter, generator, ignition switch
Scheme 1-2. Engine control unit, immobilizer relay
Scheme 1-3. Engine control unit, ignition coils, output stage No. 1
Scheme 1-4. Engine control unit, ignition coils, output stage No. 2
Scheme 1-5. Engine control unit, knock sensor 1...
Full list of articles in this category »
Schemes (petrol engine 4.2 l)
Scheme 2-1. Battery, starter, generator
Scheme 2-2. Engine control unit, immobilizer relay
Diagram 2-3. Engine control unit, fuel injectors and ignition coils of cylinders 1-4
Diagram 2-4. Engine control unit, fuel injectors and ignition coils of cylinders 5-8
Diagram 2-5. Engine control unit, throttle valve, accelerator pedal sensor...
Full list of articles in this category »
Schemes (diesel engine 2.5 l)
Scheme 3-1. Battery, starter, generator, immobilizer relay
Schematic 3-2. Preheating unit, glow plugs, heating relay
Schematic 3-3. Engine/fuel system control unit, fuel system relay
Diagram 3-4. Engine control unit, mass air flow sensor...
Diagram 3-5. Engine control unit, cruise control switch, brake light switch
Full list of articles in this category »

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A6(C5 AR, 1999-2005) 
  • General information
  • User manual
  • Maintenance
  • Troubleshooting
  • Power unit
  • V6 petrol engines
  • V8 petrol engines
  • Diesel engines
  • Cooling and heating system
  • Injection system (gasoline)
  • Fuel system (diesel)
  • Supply system
  • Exhaust system
  • Ignition system
  • Transmission
  • Clutch
  • Mechanical gearbox
  • Automatic gearbox
  • Chassis
  • Brake system
  • Car suspension
  • Steering
  • Body
  • Body elements
  • Doors, locks and windows
  • Electrical equipment
  • Equipment and devices
  • Power devices
  • Electrical circuits
  • Schemes (petrol engine 2.7 l)
  • Schemes (petrol engine 4.2 l)
  • Schemes (diesel engine 2.5 l)
 
A6(C5, 1997-2004) 
  • General information
  • User manual
  • Maintenance
  • Power unit
  • Engine repair
  • Cooling system
  • Fuel system
  • Engine management
  • Fuel system (diesel)
  • Exhaust system
  • Transmission
  • Clutch
  • Car gearbox
  • Chassis
  • Front suspension
  • Rear suspension
  • Steering
  • Wheels and tires
  • Brake system
  • Body
  • Exterior
  • Interior
  • Electrical equipment
  • Air conditioner
  • Equipment and devices
  • Electrical circuits
 
A6(C4, 1994-1997) 
  • General information
  • User manual
  • Maintenance (gasoline)
  • Maintenance (Diesel)
  • Gasoline engines
  • 4 cylinder engines
  • 5 cylinder engines
  • 6 cylinder engines
  • Diesel engines
  • 4 cylinder engines
  • 5 cylinder engines
  • Engine repair
  • Removal and reassembly
  • Cooling system
  • Single point injection system
  • Multipoint injection system
  • MPI/MPFI injection system
  • Fuel system (diesel)
  • Exhaust system
  • Ignition system
  • Transmission
  • Clutch
  • Manual transmission
  • Automatic transmission
  • Drive shafts
  • Chassis
  • Brake system
  • Front suspension
  • Rear suspension
  • Steering
  • Body
  • Exterior (external elements)
  • Interior (internal elements)
  • Electrical equipment
  • Power devices
  • Lighting and appliances
  • Electrical circuits
 
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