| D | Ignition/starter switch |
| F4 | Reversing light switch |
| F125 | Multi-function switch |
| J104 | ABS with EDL control unit |
| J402 | Operating electronics control unit, navigation |
| J431 | Headlight range control, control unit |
| S5 | Fuse in fuse box |
| S231 | Fuse 31 in fuse box |
| T17f | 17-pin connector, black, in 8-point relay carrier, behind driver's storage compartment |
| T17k | 17-pin connector, red, connector point, electronics box, plenum chamber |
| T17m | 17-pin connector, blue, connector point, A pillar, right |
| T17r | 17-pin connector, white, behind dash panel, centre |
| 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 (RF (reversing light)), in dash panel wiring harness |
| * | Models with manual gearbox |
| ** | Models with automatic gearbox |
| # | ABS 5.7 |
| ## | ABS with ESP, applies to allroad models only |
| D | Ignition/starter switch |
| J285 | Control unit with display in dash panel insert |
| J402 | Operating electronics control unit, navigation |
| J429 | Central locking control unit |
| S243 | Fuse 43 in fuse box |
| T8f | 8-pin connector, black, radio connector III |
| T10bk | 10-pin connector, purple, in luggage compartment, left |
| T16a | 16-pin connector, diagnosis connection |
| T17 | 17-pin connector, orange, connector point, A pillar, right |
| T17r | 17-pin connector, white, behind dash panel, centre |
| T26 | 26-pin connector, on operating electronics control unit, navigation |
| T32 | 32-pin connector, blue, on dash panel insert |
| 280 | Earth connection, in communication systems wiring harness |
| A19 | Connection (58s), in dash panel wiring harness (switch illumination) |
| A21 | Connection (86s), in dash panel wiring harness |
| A27 | Connection (speed signal), in dash panel wiring harness |
| A159 | Connection (L), in dash panel wiring harness |
| * | Models with anti-theft alarm system |
| J402 | Operating electronics control unit, navigation |
| J412 | Operating electronics control unit, telephone |
| J507 | Control unit for voice control |
| J526 | Telephone/telematics control unit |
| S237 | Fuse 37 in fuse box |
| T8f | 8-pin connector, black, radio connector III |
| T10bg | 10-pin connector, connector 2, on telematics control unit |
| T15s | 15-pin connector, blue, connector point, A pillar, left |
| T17r | 17-pin connector, white, behind dash panel, centre |
| T18b | 18-pin connector, on operating electronics control unit, telephone |
| T20c | 20-pin connector, black, radio connector I |
| T26c | 26-pin connector, green, on control unit for voice control |
| T46 | 46-pin connector, connector 1, on telematics control unit |
| V37 | Positive (+) connection (30), in communication systems wiring harness |
| * | Models with telephone/telematics |
| ** | Models with mobile phone |
| # | Models with TV tuner |
| ♦ | Telematics with voice control |
| ♦♦ | Telematics without voice control |
| J402 | Operating electronics control unit, navigation |
| R43 | Amplifier with bass loudspeaker (luggage compartment, right) |
| T20c | 20-pin connector, black, radio connector I |
| 280 | Earth connection, in communication systems wiring harness |
| 610 | Earth point (audio), below centre console, front |
| * | Models with radio Bose sound system |
| 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 |
| 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 |
| T8e | 8-pin connector, brown, radio connector II |
| # | Models with active loudspeakers |
| J402 | Operating electronics control unit, navigation |
| J526 | Telephone/telematics control unit |
| R15 | Bass loudspeaker, rear left |
| R17 | Bass loudspeaker, rear right |
| R34 | Mid-range/treble loudspeaker, rear left |
| R35 | Mid-range/treble loudspeaker, rear right |
| R43 | Amplifier with bass loudspeaker (luggage compartment, right) |
| R50 | Navigation aerial |
| R52 | Radio/telephone/navigation aerial |
| R86 | Aerial amplifier, mobile telephone (compensor) |
| R110 | Aerial filter (GPS) |
| 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 |
| T20c | 20-pin connector, black, radio connector I |
| 610 | Earth point (audio), below centre console, front |
| * | Models with active loudspeakers |
| ** | Saloon models |
| *** | Avant models |
| # | Models with mobile telephone |
| ## | Models with telematics |
| ### | Models with telephone |
| ♦ | Roof aerial |
| J402 | Operating electronics control unit, navigation |
| J415 | Navigation/TV tuner |
| T10bk | 10-pin connector, purple, in luggage compartment, left |
| T26 | 26-pin connector, on operating electronics control unit, navigation |
| T54 | 54-pin connector, black, on TV tuner |
| 280 | Earth connection, in communication systems wiring harness |
| V41 | Connection (high bus), in communication systems wiring harness |
| V42 | Connection (low bus), in communication systems wiring harness |
| • | CAN bus (data wire) |
| * | Models with TV tuner |
| J285 | Control unit with display 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 |
| T17r | 17-pin connector, white, behind dash panel, centre |
| T32c | 32-pin connector, grey, on dash panel insert |
| 280 | Earth connection, in communication systems 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) |
| * | Models with TV tuner |
| C18 | Windscreen aerial suppression filter |
| E15 | Heated rear window switch |
| J415 | Navigation/TV tuner |
| J515 | Aerial selection control unit |
| R55 | TV aerial -1- |
| R56 | TV aerial -2- |
| R57 | TV aerial -3- |
| R58 | TV aerial -4- |
| R82 | Aerial amplifier 1, TV |
| R83 | Aerial amplifier 2, TV |
| R84 | Aerial amplifier 3, TV |
| R85 | Aerial amplifier 4, TV |
| T10ba | 10-pin connector, blue, connector point, A pillar, left |
| Z1 | Heated rear window |
| Z24 | Heated rear window with window aerial |
| 75 | Earth point, rear pillar, right |
| * | Models with TV tuner |
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