A3 Mk1
| Block diagram of multi-function steering wheel (as of MY 02) |
| 1 - | CAN bus (infotainment) |
| 2 - | Mobile telephone operating electronics control unit -J412- or telephone transmitter and receiver unit -R36- |
| 3 - | Multi-function steering wheel control unit -J453- |
| q | Above relay carrier beneath driver's storage compartment |
| q | Removing and installing → Chapter |
| 4 - | Multi-function steering wheel |
| q | With integrated switches |
| q | With steering wheel electronics |
| q | Button assignment → Chapter |
| q | Removing and installing multi-function buttons → Chapter |
| q | Removing and installing Tiptronic buttons → Chapter |
| 5 - | Telephone/telematics control unit -J526- |
| q | In passenger's footwell |
| 6 - | Operating electronics control unit, navigation -J402- |
| q | In centre console |
| 7 - | Dash panel insert |
| q | In dash panel |
| 8 - | Radio -R- |
| q | In centre console |
