Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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2018 Audi A5 Quattro Premium, 2D Coupe, Standard Trans
Repair and Diagnosis
2018 Audi A5 Quattro Premium, 2D Coupe, Standard TransSECTION Repair and Diagnosis
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Quick Lookups- Accessories & Equipment
- Anti-Theft Systems
- Collision/Avoidance
- Driver Assistance Systems Front Camera
- Driver Assistance Systems Front Camera (Calibration)
- Dynamic Steering System
- Lane Change Assistance System
- Parallel Parking Assist System
- Parking Aid System
- Peripheral Camera System
- Rearview Camera System
- Wheels, Tires, Wheel Alignment (Suspension, Wheels, Steering) [Coupe]
- Communication Devices
- Cruise Control Systems
- Adaptive Cruise Control ((Acc) Adjustment)
- Adaptive Cruise Control (Acc) System
- Charging System (Battery, Starter, Generator) And Cruise Control [Coupe] (Battery - Adaptive Cruise Control)
- Charging System (Battery, Starter, Generator) And Cruise Control [Coupe] (Battery - Generator)
- Wheels, Tires, Wheel Alignment (Suspension, Wheels, Steering) [Coupe]
- Drivers Assistance Systems - ADAS
- Driver Assistance Systems Front Camera
- Driver Assistance Systems Front Camera (Calibration)
- Dynamic Steering System
- Lane Change Assistance System
- Parallel Parking Assist System
- Parking Aid System
- Peripheral Camera System
- Rearview Camera System
- Wheels, Tires, Wheel Alignment (Suspension, Wheels, Steering) [Coupe]
- Entertainment Systems
- Exterior Lights
- Gauges & Instrument Panels
- Infotainment
- Interior/Exterior Trim
- Interior/Illumination Lights
- Mirrors
- Seats
- Warning Systems
- Window Motors & Regulators
- Wiper/Washer Systems
- Wiring System (Data Link Connectors, Pwr Dist., Grnd Dist.)
- Body & Frame
- Brakes
- Drivelines & Axles
- Electrical
- Engine Mechanical
- Blowers, Superchargers & Turbochargers
- Cooling Fan
- Cooling System (Mechanical)
- Exhaust
- Exhaust System, Emission Controls [CYMC,CYRB,CYRC,CWPB,DDWA,DKNA,DKWA,DLHB,DDWB] [Coupe]
- Exhaust System, Emission Controls [CYMC] [Coupe]
- General, Technical Data (Body Interior) [Coupe]
- General, Technical Data [CYMC,CYRB,CYRC,CWPB,DDWA,DKNA,DKWA,DLHB,DDWB] [Coupe]
- General, Technical Data [CYMC] [Coupe]
- Wiring Diagram [CYMC] [Coupe/Convertible]
- Fuel System
- Fuel Supply (EVAP Leak Test) [Coupe]
- Fuel Supply [CYMC] [Coupe]
- General, Technical Data (Body Interior) [Coupe]
- General, Technical Data (Fuel Supply System) [Coupe]
- General, Technical Data [CYMC,CYRB,CYRC,CWPB,DDWA,DKNA,DKWA,DLHB,DDWB] [Coupe]
- General, Technical Data [CYMC] [Coupe]
- MULTIPORT Fuel Injection (CYMC,CYRB,CYRC,CWPB,DDWA,DKNA,DKWA,DLHB,DDWB) [Coupe]
- MULTIPORT Fuel Injection [CYMC] [Coupe]
- Wiring Diagram [CYMC] [Coupe/Convertible]
- Lubrication System
- General, Technical Data (Body Interior) [Coupe]
- General, Technical Data (Oil Gauge Tester T40178 Service Values) [Coupe]
- General, Technical Data [CYMC,CYRB,CYRC,CWPB,DDWA,DKNA,DKWA,DLHB,DDWB] [Coupe]
- General, Technical Data [CYMC] [Coupe]
- Lubrication [CYMC] (1 Of 2) [Coupe]
- Lubrication [CYMC] (2 Of 2) [Coupe]
- Wiring Diagram [CYMC] [Coupe/Convertible]
- Mechanical
- Crankshaft, Cylinder Block [CYMC,CYRB,CYRC,CWPB,DDWA,DKNA,DKWA,DLHB,DDWB] [Coupe]
- Crankshaft, Cylinder Block [CYMC] [Coupe]
- Cylinder Head, VALVETRAIN [CYMC,CYRB,CYRC,CWPB,DDWA,DKNA,DKWA,DLHB,DDWB] [Coupe]
- Cylinder Head, VALVETRAIN [CYMC] [Coupe]
- Engine Assembly [CYMC,CYRB,CYRC,CWPB,DDWA,DKNA,DKWA,DLHB,DDWB] [Coupe]
- Engine Assembly [CYMC] [Coupe]
- General, Technical Data (Body Interior) [Coupe]
- General, Technical Data [CYMC,CYRB,CYRC,CWPB,DDWA,DKNA,DKWA,DLHB,DDWB] [Coupe]
- General, Technical Data [CYMC] [Coupe]
- Wiring Diagram [CYMC] [Coupe/Convertible]
- Engine Performance
- Emissions
- Engine Control Systems
- Generic Scan Tool (General Information & Description And Operation) [CYMC] (1 Of 2) [Coupe]
- Generic Scan Tool (General Information & Description And Operation) [CYMC] (2 Of 2) [Coupe]
- Generic Scan Tool [CYMC] - Engine DTC Tables (Engine Control Module --, 2017 My, A4 Only) [Coupe]
- Generic Scan Tool [CYMC] - Engine DTC Tables (Engine Control Module --, 2018 My, A4 W/Automatic Transmission And All A5 Models) [Coupe]
- Generic Scan Tool [CYMC] [Coupe] [Engine DTC Tables (2019) & Diagnostic Procedures]
- Generic Scan Tool [CYMC] [Coupe] [Transmission DTC Tables (2017 - 2019) & Diagnostic Procedures]
- Generic Scan Tool [CYMC] [Coupe] [Transmission DTC Tables (2018 - 2020) & Diagnostic Procedures]
- Fuel Delivery
- Fuel Supply (EVAP Leak Test) [Coupe]
- Fuel Supply [CYMC] [Coupe]
- General, Technical Data (Body Interior) [Coupe]
- General, Technical Data (Fuel Supply System) [Coupe]
- General, Technical Data [CYMC,CYRB,CYRC,CWPB,DDWA,DKNA,DKWA,DLHB,DDWB] [Coupe]
- General, Technical Data [CYMC] [Coupe]
- MULTIPORT Fuel Injection (CYMC,CYRB,CYRC,CWPB,DDWA,DKNA,DKWA,DLHB,DDWB) [Coupe]
- MULTIPORT Fuel Injection [CYMC] [Coupe]
- Wiring Diagram [CYMC] [Coupe/Convertible]
- Ignition System
- General, Technical Data (Body Interior) [Coupe]
- General, Technical Data [CYMC,CYRB,CYRC,CWPB,DDWA,DKNA,DKWA,DLHB,DDWB] [Coupe]
- General, Technical Data [CYMC] [Coupe]
- Ignition/Glow Plug System [CYMC,CYRB,CYRC,CWPB,DDWA,DKNA,DKWA,DLHB,DDWB] [Coupe]
- Ignition/Glow Plug System [CYMC] [Coupe]
- Wiring Diagram [CYMC] [Coupe/Convertible]
- Remove, Overhaul & Install
- Specifications
- System
- Generic Scan Tool (General Information & Description And Operation) [CYMC] (1 Of 2) [Coupe]
- Generic Scan Tool (General Information & Description And Operation) [CYMC] (2 Of 2) [Coupe]
- Generic Scan Tool [CYMC] - Engine DTC Tables (Engine Control Module --, 2017 My, A4 Only) [Coupe]
- Generic Scan Tool [CYMC] - Engine DTC Tables (Engine Control Module --, 2018 My, A4 W/Automatic Transmission And All A5 Models) [Coupe]
- Generic Scan Tool [CYMC] [Coupe] [Engine DTC Tables (2019) & Diagnostic Procedures]
- Generic Scan Tool [CYMC] [Coupe] [Engine DTC Tables]
- Generic Scan Tool [CYMC] [Coupe] [Transmission DTC Tables (2017 - 2019) & Diagnostic Procedures]
- Generic Scan Tool [CYMC] [Coupe] [Transmission DTC Tables (2018 - 2020) & Diagnostic Procedures]
- Testing & Diagnosis
- Generic Scan Tool (General Information & Description And Operation) [CYMC] (1 Of 2) [Coupe]
- Generic Scan Tool (General Information & Description And Operation) [CYMC] (2 Of 2) [Coupe]
- Generic Scan Tool [CYMC] - Engine DTC Tables (Engine Control Module --, 2017 My, A4 Only) [Coupe]
- Generic Scan Tool [CYMC] - Engine DTC Tables (Engine Control Module --, 2018 My, A4 W/Automatic Transmission And All A5 Models) [Coupe]
- Generic Scan Tool [CYMC] [Coupe] [Engine DTC Tables (2019) & Diagnostic Procedures]
- Generic Scan Tool [CYMC] [Coupe] [Engine DTC Tables]
- Generic Scan Tool [CYMC] [Coupe] [Transmission DTC Tables (2017 - 2019) & Diagnostic Procedures]
- Generic Scan Tool [CYMC] [Coupe] [Transmission DTC Tables (2018 - 2020) & Diagnostic Procedures]
- Tune-Up
- General, Technical Data (Body Interior) [Coupe]
- General, Technical Data [CYMC,CYRB,CYRC,CWPB,DDWA,DKNA,DKWA,DLHB,DDWB] [Coupe]
- General, Technical Data [CYMC] [Coupe]
- Ignition/Glow Plug System [CYMC,CYRB,CYRC,CWPB,DDWA,DKNA,DKWA,DLHB,DDWB] [Coupe]
- Ignition/Glow Plug System [CYMC] [Coupe]
- Wiring Diagram [CYMC] [Coupe/Convertible]
- General Information
- Abbreviations
- Basic Trouble Shooting
- Brakes
- Check Lists
- Driveline/Axles
- DTC Index
- Electrical
- Engine
- Engine Performance
- Electrostatic Discharge Warning - General Information
- Engine Performance Diagnostic Routine Outline - General Information
- Engine Performance Safety Precautions
- Map - Engine Performance & Maintenance
- Parasitic Load Explanation & Test Procedures - General Information
- State Emission Standards - Diesel
- State Emission Standards - Gas
- Waveforms - Injector Pattern Tutorial - General Information
- Map - Exhaust Systems
- Heating, Ventilation & A/C (HVAC)
- Hoist/Jack
- Identification
- Metric Conversions
- OEM General Information
- Reset Procedures
- Specifications Index
- Steering
- Towing
- Traction Control Disable Procedures
- Trouble Shooting - Manual Transmission - General Information
- Heating, Ventilation & A/C (HVAC)
- A/C Compressor
- General Servicing
- Air Conditioning (Refrigerant R1234YF Servicing) (Tools & Equipment) [Coupe]
- Air Conditioning (Refrigerant R134A Servicing) (General Information) [Coupe]
- Air Conditioning (Refrigerant R134A Servicing) (Refrigerant Circuit Components) [Coupe]
- Air Conditioning [Coupe]
- General, Technical Data (HVAC) [Coupe]
- General, Technical Data (Refrigerant R1234YF Servicing) [Coupe]
- HVAC Control Systems
- Air Conditioning (Refrigerant R1234YF Servicing) (Refrigerant Circuit) [Coupe]
- Air Conditioning (Refrigerant R1234YF Servicing) (Tools & Equipment) [Coupe]
- Air Conditioning (Refrigerant R134A Servicing) (General Information) [Coupe]
- Air Conditioning (Refrigerant R134A Servicing) (Refrigerant Circuit Components) [Coupe]
- Air Conditioning [Coupe]
- General, Technical Data (HVAC) [Coupe]
- General, Technical Data (Refrigerant R1234YF Servicing) [Coupe]
- Heating [Coupe]
- Maintenance
- Restraints
- Steering
- Suspension
- Transmission
- Transmission Control Systems
- Generic Scan Tool (General Information & Description And Operation) [CYMC] (1 Of 2) [Coupe]
- Generic Scan Tool (General Information & Description And Operation) [CYMC] (2 Of 2) [Coupe]
- Generic Scan Tool [CYMC] - Engine DTC Tables (Engine Control Module --, 2017 My, A4 Only) [Coupe]
- Generic Scan Tool [CYMC] - Engine DTC Tables (Engine Control Module --, 2018 My, A4 W/Automatic Transmission And All A5 Models) [Coupe]
- Generic Scan Tool [CYMC] [Coupe] [Engine DTC Tables (2019) & Diagnostic Procedures]
- Generic Scan Tool [CYMC] [Coupe] [Transmission DTC Tables (2017 - 2019) & Diagnostic Procedures]
- Generic Scan Tool [CYMC] [Coupe] [Transmission DTC Tables (2018 - 2020) & Diagnostic Procedures]
- Transmission Control Systems
- External Pages
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.