| D | Ignition/starter switch |
| J189 | Auto-check system |
| J218 | Combi-processor in dash panel insert |
| J402 | Operating electronics control unit, navigation |
| T20 | 20-pin connector, black, on dash panel insert |
| T26b | 26-pin connector, on operating electronics control unit, navigation |
| T32 | 32-pin connector, blue, on dash panel insert |
| T32a | 32-pin connector, green, on dash panel insert |
| 199 | Earth connection -3-, in dash panel wiring harness |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A19 | Connection (58d), in dash panel wiring harness |
| A40 | Positive (+) connection -1- (30), in dash panel wiring harness |
| A50 | Positive (+) connection (30as), in dash panel wiring harness |
| A60 | Connection (vehicle speed signal), in dash panel wiring harness |
| A74 | Connection (15a, fuse 5), in dash panel wiring harness |
| J402 | Operating electronics control unit, navigation |
| J412 | Operating electronics control unit, telephone |
| R | Radio |
| R36 | Telephone transmitter and receiver unit |
| T6x | 6-pin connector, green, on radio |
| T8a | 8-pin connector, black, on radio |
| T10i | 10-pin connector, black, in centre console |
| T10af | 10-pin connector, red, on radio |
| T10ag | 10-pin connector, brown, in centre console |
| T26b | 26-pin connector, on operating electronics control unit, navigation |
| 44 | Earth point, lower part of left A-pillar |
| A117 | Connection (enable), in dash panel wiring harness |
| A118 | Connection (data), in dash panel wiring harness |
| A119 | Connection (clock), in dash panel wiring harness |
| A129 | Connection (muting), in dash panel wiring harness |
| * | Only models with telephone |
| ** | Only models with mobile telephone |
| *** | Only models with radio |
| E199 | Navigation system operating unit |
| J402 | Operating electronics control unit, navigation |
| R | Radio |
| R39 | Loudspeaker for navigation |
| T6n | 6-pin connector, yellow, at A pillar, left |
| T10i | 10-pin connector, black, in centre console |
| T10af | 10-pin connector, red, on radio |
| T26b | 26-pin connector, on operating electronics control unit, navigation |
| 135 | Earth connection -2-, in dash panel wiring harness |
| * | Does not apply to radio |
| ** | Only models with radio |
| J401 | Navigation system with CD drive control unit |
| J402 | Operating electronics control unit, navigation |
| R50 | Navigation aerial (GPS) |
| T10aj | 10-pin connector, red, connector point, A pillar, left |
| T12 | 12-pin connector, black, on operating electronics control unit, navigation |
| 135 | Earth connection -2-, in dash panel wiring harness |
| 264 | Earth connection (external screening ), in navigation wiring harness |
| E15 | Heated rear window switch |
| F4 | Reversing light switch |
| G197 | Magnetic field sender (compass) |
| J104 | ABS with EDL control unit |
| J401 | Navigation system with CD drive control unit |
| M16 | Reversing light bulb, left |
| M17 | Reversing light bulb, right |
| N219 | Heated rear window shunt resistor |
| T2ah | 2-pin connector, black, in rear left luggage compartment |
| T6g | 6-pin connector, grey, right connector point, A pillar |
| T10a | 10-pin connector, brown, left connector point, A pillar |
| T10m | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T10aj | 10-pin connector, red, connector point, A pillar, left |
| Z1 | Heated rear window |
| 218 | Earth connection -1- , in tailgate/bootlid wiring harness |
| A87 | Connection (reversing light), in dash panel wiring harness |
| A127 | Connection (rear left speed sensor), in dash panel wiring harness |
| A128 | Connection (rear right speed sensor), in dash panel wiring harness |
| * | Applies to Audi Avant models only |
| ** | Only models with manual gearbox |
| *** | Only models with electronic stability program |
| **** | Only models with Audi saloons |
