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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HOMESERVICE MANUALSAUDI2005A4 BASE, 4D SEDAN, 3.0 TREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTSTEERING COLUMN SWITCHESCOMMUNICATION
2005 Audi A4 Base, 4D Sedan, 3.0 T
Steering Column Switches: Communication
2005 Audi A4 Base, 4D Sedan, 3.0 TSECTION Communication
- 91 - Communication
- Radio Systems
- General information
- Radio system overview
- Connectors and connector assignments
- Antenna amplifier connections
- Total overview - Sedan component locations
- General overview - Avant component locations
- "Chorus" / "Concert" , removing and installing
- "Symphony" radio, removing and installing
- "Symphony II+" in transport mode, activating/deactivating
- CD Changer R41 , removing and installing
- iPod Baseplate R192 , removing and installing
- Speakers in doors, removing and installing
- Inside Loudspeaker R70 , removing and installing
- Bass Loudspeaker R100 , Sedan, removing and installing
- Bass Loudspeaker R100 , Avant, removing and installing
- Amplifier R12 , Sedan, removing and installing
- Amplifier R12 , Avant, removing and installing
- BOSE Amplifier R12 , Sedan, removing and installing
- BOSE Amplifier R12 , Avant, removing and installing
- Inside Microphone R74 , function test
- Inside Microphone R74 , removing and installing
- Antenna Amplifier R24 / Antenna Selection Control Module J515 , sedan, removing and installing
- Left Antenna Module R108 , Avant, removing and installing
- Satellite Radio Systems, USA
- General information
- Radio system overview
- Layout of communication system with Satellite Radio Systems
- Connectors and connector assignments
- Antenna amplifier connections
- Total overview - Sedan component locations
- General overview - Avant component locations
- Satellite Radio R146 , removing and installing, activating
- Radio, Telephone, Navigation System Antenna R52 , sedan, removing and installing
- Radio, Telephone, Navigation System Antenna R52 , Avant, removing and installing
- Telephone system
- General information
- Telephone systems, overview
- Connectors and connector assignments
- Total overview - Sedan component locations
- General overview - Avant component locations
- Telephone Baseplate R126 , removing and installing
- Telephone Transceiver R36 , removing and installing
- Telephone Transceiver R36 (telephone, fixed installation), removing and installing
- Telephone Amplifier R86 , Sedan, removing and installing
- Telephone Amplifier R86 , Avant, removing and installing
- Telephone Microphone R38 , removing and installing
- Telephone Antenna R65 , Sedan, removing and installing
- Telephone Antenna R65 , Avant, removing and installing
- Telephone system - USA
- Navigation system IV (BNS 4.0)
- General information
- Navigation system BNS 4.0, overview
- Navigation System with CD Drive Control Module J401 , harness connectors
- Total overview - Sedan component locations
- General overview - Avant component locations
- Navigation System with CD Drive Control Module J401 , removing and installing
- Function Selector Switch II E272 , removing and installing
- Navigation System Antenna R50 , Sedan, removing and installing
- Navigation System Antenna R50 , Avant, removing and installing
- Navigation system II-D (Navigation System Plus)
- General information
- Error messages on screen
- Navigation system II-D, overview
- Connectors and connector assignments
- Total overview - Sedan component locations
- General overview - Avant component locations
- Operating Electronics, Navigation Control Module J402 , removing and installing
- Navigation Interface R94 , Sedan, removing and installing
- Navigation Interface R94 , Avant, removing and installing
- Navigation/TV Tuner J415 , removing and installing
- Right Antenna Module R109 , Avant, removing and installing
- RNS-E navigation system
- General information
- Error messages on screen
- RNS-E navigation system, overview
- Navigation System with CD Drive Control Module J401 , harness connectors
- Navigation/TV Tuner J415 connections
- Total overview - Sedan component locations
- General overview - Avant component locations
- Navigation System with CD Drive Control Module J401 , removing and installing
- RNSE-E navigation system, USA
- RNS-JP3 navigation system, Japan
- General information
- RNS-JP3 navigation system, overview
- Connectors and connector assignments
- Component locations, general overview
- Operating Electronics, Navigation Control Module J402 , removing and installing
- Antenna Selection Control Module J515 , sedan, removing and installing - sedan
- Antenna Selection Control Module J515 , Avant, removing and installing
- RNS-JP4 navigation system, Japan
- RNS low navigation system
- Telematics
- General information
- On Board Diagnostic (OBD), function
- Audi Telematics by OnStar, functions
- Telematics System - Sedan, layout
- Telematics System - Avant, layout
- Telephone/Telematics Control Module J526 , multi-pin connector assignments
- Telematics System - Sedan, component overview
- Telematics System - Avant, component overview
- Service mode, activating/deactivating
- Telephone/Telematics Control Module J526 , removing and installing
- Telephone/Telematics Control Module J526 , replacing and configuring
- Emergency Battery (Telematics) A16 , switching on/off
- Emergency Battery (Telematics) A16 , removing and installing
- Antenna Splitter R87 - Avant, removing and installing
- Telematics Control Head E264 , removing and installing
- Telephone Microphone R38 , removing and installing
- Auxiliary Speaker (Telematics) R91 , removing and installing
- Telephone Antenna R65 - Sedan, removing and installing
- Telephone Antenna R65 and Telephone Antenna 2 R127 - Avant, removing and installing
- Roof antenna with Navigation System Antenna R50 and Auxiliary Antenna (Telematics) R90 , removing and installing
- GPS Antenna Splitter R110 - Avant, removing and installing
- Speech control system
- Multifunction Steering Wheel
- Steering Column Electronic Systems Control Module J527
- Electronic route book
- Radio Systems
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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.