A4 Mk2
| Saloon |
| 1 - | Window aerials |
| 2 - | Navigation aerial -R50- behind roof end trim |
| 3 - | Multi-pin connector, 4-pin, black, loudspeaker connection |
| 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 - | Bass loudspeaker -R100- in rear shelf |
| 10 - | Amplifier -R12- behind luggage compartment side trim (right-side) |
| 11 - | Multi-pin connector, 12-pin, black, amplifier -R12- |
| 12 - | Multi-pin connector, 2-pin, black, voltage supply |
| 13 - | Multi-pin connector, 2-pin, black, CAN bus (infotainment) |
| 14 - | GPS connection (blue) from navigation aerial -R50- |
| 15 - | Connection TV3/TV4 (green) from aerial selection control unit -J515- |
| 16 - | Connection TV1/TV2 (brown) from aerial selection control unit -J515- |
| 17 - | Connection AM/FM (white) from aerial selection control unit -J515- |
| 18 - | Aerial selection control unit -J515- behind roof end trim |
