A4 Mk2
| Layout of communication system with SDARS |
| 1 - | Satellite Radio -R146- located behind luggage compartment side trim (left-side) |
| 2 - | Radio, telephone and navigation system aerial -R52- (Ter./SAT/GPS/GSM), roof aerial |
| 3 - | Aerial filter (GPS) -R110- (Avant) behind luggage compartment side trim (left-side) |
| 4 - | Navigation aerial -R50- (Saloon) behind roof end trim |
| 5 - | Navigation system with CD drive control unit -J401- behind luggage compartment side trim (left-side) |
| 6 - | Radio aerials |
| 7 - | Aerial selection control unit -J515- / aerial module, left -R108- |
| 8 - | Sound systems |
| 9 - | Radio -R- in centre console (top) |
| 10 - | CAN bus (infotainment) |
| 11 - | CD changer -R41-/iPod holder -R192- in glove box |
| 12 - | Telephone transmitter and receiver unit -R36- and telephone and telematics control unit -J526- in electronics box beneath front seat (right-side) |
