A4 Mk3
| Layout in MMI (up to week 44/08) |
| 1 - | Multi-function steering wheel |
| q | Overview → Chapter |
| 2 - | Steering column electronics control unit -J527- |
| q | On steering column at steering column switch |
| 3 - | Data bus diagnostic interface -J533- |
| q | Behind glove box (left-side) |
| 4 - | CD changer -R41- |
| q | In dash panel |
| 5 - | Radio -R- |
| q | With speech input control unit -J507- |
| q | Behind luggage compartment side trim (left-side) |
| q | Pin assignment, speech input control unit -J507- → Chapter |
| q | Removing and installing speech input control unit -J507- → Chapter |
| 6 - | Navigation system with CD drive control unit -J401- |
| q | Behind luggage compartment side trim (left-side) |
| 7 - | Control unit for front display and information control panel -J523- |
| q | Behind dash panel |
| 8 - | Telephone transmitter and receiver unit -R36- |
| q | Beneath front seat (right-side) |
| 9 - | Digital sound package control unit -J525- |
| q | Behind luggage compartment side trim (left-side) |
| 10 - | Sound systems |
| 11 - | Microphone unit in front roof module -R164- |
| q | Overview → Chapter |
| 12 - | CAN Bus (convenience) |