| A | Battery |
| D | Ignition/starter switch |
| J285 | Control unit with display in dash panel insert |
| J526 | Telephone/telematics control unit |
| S2 | Fuse in fuse carrier |
| S119 | Telephone fuse |
| S204 | Fuse -1- (30) |
| T3as | 3-pin connector, black, in centre console |
| T10ae | 10-pin connector, on telephone/telematics control unit, connector 2 |
| T15 | 15-pin connector, black, in centre console |
| T32b | 32-pin connector, grey, on dash panel insert |
| TV2 | Terminal 30 junction box |
| 51 | Earth point, luggage compartment, right |
| 280 | Earth connection, in communication systems wiring harness |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A19 | Connection (58s), in dash panel wiring harness (switch illumination) |
| V23 | Positive (+) connection (15a), in navigation wiring harness |
| V36 | Connection (58s), in radio wiring harness |
| V43 | Positive (+) connection (30a), in communication systems wiring harness |
| J401 | Navigation system with CD drive control unit |
| J507 | Control unit for voice control |
| J526 | Telephone/telematics control unit |
| R | Radio |
| R51 | Radio/telephone/auxiliary heater aerial |
| T8m | 8-pin connector, blue, on navigation control unit (C III) |
| T10u | 10-pin connector, red, radio connector IV |
| T10ae | 10-pin connector, on telephone/telematics control unit, connector 2 |
| T26f | 26-pin connector, on control unit for voice control |
| V27 | Connection (mute circuit), in navigation wiring harness |
| * | With voice control |
| ** | Without voice control on models with navigation system 'NS Low' |
| *** | On models with navigation system 'NS Low' |
| J285 | Control unit with display in dash panel insert |
| J507 | Control unit for voice control |
| J526 | Telephone/telematics control unit |
| R | Radio |
| T6h | 6-pin connector, green, radio connector I - 2 |
| T8 | 8-pin connector, black, radio connector III |
| T15 | 15-pin connector, black, in centre console |
| T16a | 16-pin connector, diagnosis connection |
| T26f | 26-pin connector, on control unit for voice control |
| T32a | 32-pin connector, green, on dash panel insert |
| T46 | 46-pin connector, on telephone/telematics control unit, connector 1 |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| A148 | Connection (navigation CAN bus, high), in dash panel wiring harness |
| A149 | Connection (navigation CAN bus, low), in dash panel wiring harness |
| V40 | Connection (diagnosis wire K), 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) |
| * | With voice control |
| J401 | Navigation system with CD drive control unit |
| J507 | Control unit for voice control |
| J526 | Telephone/telematics control unit |
| R | Radio |
| R38 | Telephone microphone |
| R39 | Telephone/navigation systems loudspeaker |
| T2v | 2-pin connector, black, next to interior light |
| T8m | 8-pin connector, blue, on navigation control unit (C III) |
| T10u | 10-pin connector, red, radio connector IV |
| T26f | 26-pin connector, on control unit for voice control |
| T46 | 46-pin connector, on telephone/telematics control unit, connector 1 |
| V49 | Connection (audio frequency, NF +), in communication wiring harness |
| V50 | Connection (audio frequency, NF -), in communication wiring harness |
| * | With voice control |
| ** | Without voice control |
| *** | Models without navigation system |
| # | Models with navigation system 'NS Low' |
| ## | Models without radio |
| J507 | Control unit for voice control |
| J526 | Telephone/telematics control unit |
| R73 | Fax unit |
| T10ad | 10-pin connector, black, for fax unit |
| T26f | 26-pin connector, on control unit for voice control |
| T46 | 46-pin connector, on telephone/telematics control unit, connector 1 |
| 252 | Earth connection, in optional equipment wiring harness |
| 280 | Earth connection, in communication systems wiring harness |
| V16 | Connection (screening), in telephone wiring harness |
| * | With voice control |
