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 MANUALSAUDI1999A6 QUATTROREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESRADIO, TELEPHONE, NAVIGATION, TRIP COMPUTERRADIO SYSTEMSCD CHANGER UNIT -R41-, REMOVING AND INSTALLINGCHECKING WIRING CONNECTION BETWEEN RADIO AND CD CHANGER
1999 Audi A6 Quattro
Checking wiring connection between radio and CD changer
1999 Audi A6 QuattroSECTION Checking wiring connection between radio and CD changer
- Switch radio off.
- Press and hold MODE button on "Concert" radio, or button No. 4 on "Symphony radio, and at same time switch radio on.
- Release MODE/No. 4 button.
- Wiring connection OK
Indicated on radio display: "CONNECT" and "CD"
- Wiring connection not OK
Indicated on radio display: "NO CDC"
- Check electrical connections on CD changer.
- Repeat wiring check and, if connection has still not been established, check wiring per wiring diagram.
See appropriate System Wiring Diagram article.
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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.