| D | Ignition/starter switch |
| F4 | Reversing light switch |
| F125 | Multi-function switch |
| J104 | ABS with EDL control unit |
| J402 | Operating electronics control unit, navigation |
| S5 | Fuse in fuse box |
| S231 | Fuse in fuse box |
| T3ar | 3-pin connector, blue, connector point, A pillar, right |
| T3au | 3-pin connector, red, connector point, electronics box, plenum chamber |
| T10au | 10-pin connector, grey, connector point, A pillar, right |
| T26 | 26-pin connector, on operating electronics control unit, navigation |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A20 | Connection (15a), in dash panel wiring harness |
| A38 | Positive (+) connection -2- (15a), in dash panel wiring harness |
| A87 | Connection (RL), 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 |
| * | Models with manual gearbox |
| ** | Models with automatic gearbox |
| # | ABS 5.3 |
| ## | Only models with ABS with ESP |
| D | Ignition/starter switch |
| J218 | Combi-processor in dash panel insert |
| J402 | Operating electronics control unit, navigation |
| J429 | Central locking control unit |
| K | Diagnosis connection |
| S243 | Fuse in fuse box |
| T8f | 8-pin connector, black, radio connector III |
| T10x | 10-pin connector, green, connector point, A pillar, right |
| T15v | 15-pin connector, orange, connector point, A pillar, right |
| T16a | 16-pin connector, diagnosis connection |
| T26 | 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 |
| V21 | Aerial motor |
| 213 | Earth connection -4-, in dash panel wiring harness |
| A27 | Connection (speed signal), in dash panel wiring harness |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| * | Only models with aerial motor |
| ** | Models with anti-theft alarm system |
| J402 | Operating electronics control unit, navigation |
| R39 | Telephone/navigation systems loudspeaker |
| R41 | CD changer |
| T2ar | 2-pin connector, black, behind dash panel, centre |
| T2av | 2-pin connector, black, for loudspeaker, B pillar, left |
| T8e | 8-pin connector, brown, radio connector II |
| T8g | 8-pin connector, blue, radio connector I - 3 |
| 213 | Earth connection -4-, in dash panel wiring harness |
| V14 | Connection (screening), in CD changer wiring harness |
| * | Models with radio Bose sound system and telephone |
| ** | Models with CD changer |
| J402 | Operating electronics control unit, navigation |
| J412 | Operating electronics control unit, telephone |
| R36 | Telephone transmitter and receiver unit |
| S237 | Fuse 37 in fuse box |
| T6x | 6-pin connector, green, radio connector I - 2 |
| T8f | 8-pin connector, black, radio connector III |
| T10x | 10-pin connector, green, connector point, A pillar, right |
| T15s | 15-pin connector, blue, connector point, A pillar, left |
| A50 | Positive (+) connection (30a), in dash panel wiring harness |
| * | Models with telephone |
| ** | Models with mobile phone |
| # | Models with active loudspeakers |
| ## | Models with radio Bose sound system |
| J402 | Operating electronics control unit, navigation |
| R43 | Amplifier with bass loudspeaker (luggage compartment, right) |
| T6w | 6-pin connector, yellow, radio connector I - 1 |
| T10x | 10-pin connector, green, connector point, A pillar, right |
| 133 | Earth connection, in loudspeaker wiring harness |
| 610 | Earth point (audio), below centre console, front |
| V1 | Positive (+) connection (30), in rear loudspeaker wiring harness |
| * | Models with radio Bose sound system |
| ** | Models with active loudspeakers |
| J402 | Operating electronics control unit, navigation |
| R15 | Bass loudspeaker, rear left |
| R17 | Bass loudspeaker, rear right |
| R21 | Bass loudspeaker, front left |
| R23 | Bass loudspeaker, front right |
| R26 | Middle-high tone loudspeaker, front left |
| R27 | Middle-high tone loudspeaker, front right |
| R34 | Middle-treble tone loudspeaker, rear left |
| R35 | Middle-treble tone loudspeaker, rear right |
| R43 | Amplifier with bass loudspeaker (luggage compartment, right) |
| T3ae | 3-pin connector, brown, connector point, A pillar, left |
| T3af | 3-pin connector, brown, connector point, A pillar, right |
| T3ag | 3-pin connector, blue, in B pillar, left |
| T3ah | 3-pin connector, blue, in B pillar, right |
| T3al | 3-pin connector, black, in driver's door |
| T3am | 3-pin connector, black, in front passenger's door |
| T3an | 3-pin connector, black, in door, rear left |
| T3ao | 3-pin connector, black, in door, rear right |
| T4ax | 4-pin connector, on Bose power amplifier |
| * | Models with radio Bose sound system |
| ** | Bass loudspeaker (saloon models) |
| *** | Bass loudspeaker (Avant models) |
| J402 | Operating electronics control unit, navigation |
| J453 | Multi-function steering wheel control unit |
| R21 | Bass loudspeaker, front left |
| R23 | Bass loudspeaker, front right |
| R26 | Middle-high tone loudspeaker, front left |
| R27 | Middle-high tone loudspeaker, front right |
| T3ae | 3-pin connector, brown, connector point, A pillar, left |
| T3af | 3-pin connector, brown, connector point, A pillar, right |
| T3al | 3-pin connector, black, in driver's door |
| T3am | 3-pin connector, black, in front passenger's door |
| T6x | 6-pin connector, green, radio connector I - 2 |
| T8e | 8-pin connector, brown, radio connector II |
| T10x | 10-pin connector, green, connector point, A pillar, right |
| * | Models with passive loudspeakers |
| ** | Models with multi-function steering wheel |
| # | Models with active loudspeakers |
| J402 | Operating electronics control unit, navigation |
| R15 | Bass loudspeaker, rear left |
| R17 | Bass loudspeaker, rear right |
| R34 | Middle-treble tone loudspeaker, rear left |
| R35 | Middle-treble tone loudspeaker, rear right |
| R43 | Amplifier with bass loudspeaker (luggage compartment, right) |
| T3ag | 3-pin connector, blue, in B pillar, left |
| T3ah | 3-pin connector, blue, in B pillar, right |
| T3an | 3-pin connector, black, in door, rear left |
| T3ao | 3-pin connector, black, in door, rear right |
| T6w | 6-pin connector, yellow, radio connector I - 1 |
| T8e | 8-pin connector, brown, radio connector II |
| 610 | Earth point (radio), below centre console, front |
| * | Models with active loudspeakers |
| ** | Models with passive loudspeakers |
| G197 | Magnetic field sender (compass) |
| J402 | Operating electronics control unit, navigation |
| J415 | Navigation/TV tuner |
| R1 | Aerial connection |
| R50 | Navigation aerial (GPS) |
| R51 | Radio/telephone/auxiliary heater aerial |
| R52 | Radio/telephone/navigation aerial (GPS) |
| T6am | 6-pin connector, white, on TV tuner |
| T10ab | 10-pin connector, purple, connector point, A pillar, right |
| T11 | 11-pin connector, on TV tuner |
| T11a | 11-pin connector, black, on operating electronics control unit, navigation |
| T26 | 26-pin connector, on operating electronics control unit, navigation |
| 266 | Earth connection, in navigation wiring harness |
| 610 | Earth point (radio), below centre console, front |
| V22 | Positive (+) connection (30a), in navigation wiring harness |
| * | Saloon models |
| ** | Avant models |
| *** | Models with TV tuner |
| • | CAN bus (data wire) |
| # | Applies to allroad models only |
| J218 | Combi-processor in dash panel insert |
| J402 | Operating electronics control unit, navigation |
| J415 | Navigation/TV tuner |
| J515 | Aerial selection control unit |
| R1 | Aerial connection |
| R94 | Navigation interface |
| T3bh | 3-pin connector, black, on aerial selection control unit |
| T12f | 12-pin connector, at navigation interface |
| T32c | 32-pin connector, grey, on dash panel insert |
| 213 | Earth connection -4-, in dash panel wiring harness |
| 266 | Earth connection, in navigation wiring harness |
| A148 | Connection (navigation CAN bus, high), in dash panel wiring harness |
| A149 | Connection (navigation CAN bus, low), in dash panel wiring harness |
| • | CAN bus (data wire) |
