A4 Mk2
| Saloon |
| 1 - | Rear window aerials for AM/FM |
| 2 - | Navigation aerial -R50- behind roof end trim |
| 3 - | Control unit with display for radio and navigation -J503- in centre console (top) |
| 4 - | Mid-range/treble loudspeaker, front left -R26-/mid-range/treble loudspeaker, front right -R27- in front doors (top) |
| 5 - | Bass loudspeaker, front left -R21- and bass loudspeaker, front right -R23- in front doors (bottom) |
| 6 - | Internal loudspeaker -R70- in dash panel (front centre) |
| 7 - | Mid-range/treble loudspeaker, rear left -R34-/mid-range/treble loudspeaker, rear right -R35- in rear doors (top) |
| 8 - | Bass loudspeaker, rear left -R15-/bass loudspeaker, rear right -R17- in rear doors (bottom) |
| 9 - | Amplifier -R12- behind luggage compartment side trim (right-side) |
| 10 - | Bass loudspeaker -R100- in rear shelf |
| 11 - | CD changer -R41-/iPod holder -R192- in glove box |
| 12 - | CAN bus (infotainment) |
| 13 - | Telephone transmitter and receiver unit -R36- in electronics box beneath front seat (right-side) |
| 14 - | Aerial selection control unit -J515- behind roof end trim |
