| J220 | Motronic control unit |
| J248 | Diesel direct injection system control unit |
| J514 | Electronic manual gearbox control unit |
| J537 | 4LV (injection system) control unit |
| T17d | 17-pin connector, green, in footwell, front left |
| T17e | 17-pin connector, blue, in footwell, front left |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| * | Only applies to models with engine code ANY |
| ** | Only applies to models with engine code BBY |
| *** | Only applies to models with engine code BAD |
| G85 | Steering angle sender |
| J104 | ABS with EDL control unit |
| J248 | Diesel direct injection system control unit |
| J500 | Power steering control unit |
| T4 | 4-pin connector, black, on power steering control unit |
| T17e | 17-pin connector, blue, in footwell, front left |
| T17f | 17-pin connector, white, connector point, A pillar, left |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| * | Only applies to models with engine code AMF |
| ** | Only applies to models with power steering |
| J285 | Control unit with display in dash panel insert |
| T16 | 16-pin connector, diagnostic connector, black, near fuse box |
| T32a | 32-pin connector, green, on dash panel insert |
| T32b | 32-pin connector, grey, on dash panel insert |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| A178 | Connection (infotainment CAN bus, high), in dash panel wiring harness |
| A179 | Connection (infotainment CAN bus, low), in dash panel wiring harness |
| B229 | Connection (high bus), in interior wiring harness |
| B230 | Connection (low bus), in interior wiring harness |
| * | Only applies to models with driver information system |
| E87 | Air conditioning system/Climatronic operating and display unit |
| J386 | Door control unit, driver's side |
| J387 | Door control unit, front passenger's side |
| J388 | Door control unit, rear left |
| J389 | Door control unit, rear right |
| T10o | 10-pin connector, black, door control unit, driver's door |
| T10p | 10-pin connector, black, door, front right |
| T10q | 10-pin connector, black, door control unit, rear left |
| T10r | 10-pin connector, black, door, rear right |
| T20a | 20-pin connector, black, at A pillar, left |
| T20b | 20-pin connector, black, at A pillar, right |
| T20c | 20-pin connector, black, at B pillar, left |
| T20d | 20-pin connector, black, at B pillar, right |
| A178 | Connection (infotainment CAN bus, high), in dash panel wiring harness |
| A179 | Connection (infotainment CAN bus, low), in dash panel wiring harness |
| B229 | Connection (high bus), in interior wiring harness |
| B230 | Connection (low bus), in interior wiring harness |
| * | Only applies to models with air conditioning system |
| ** | Only applies to models with rear electric windows |
| J393 | Convenience system central control unit |
| J446 | Parking aid control unit |
| R | Radio |
| T16e | 16-pin connector, black, in luggage compartment, right |
| T20 | 20-pin connector, black, radio connector I |
| A178 | Connection (infotainment CAN bus, high), in dash panel wiring harness |
| A179 | Connection (infotainment CAN bus, low), in dash panel wiring harness |
| B229 | Connection (high bus), in interior wiring harness |
| B230 | Connection (low bus), in interior wiring harness |
| * | Only applies to models with parking aid, rear |
| ** | Only applies to models without driver information system |
| *** | Only applies to models with driver information system |
| J401 | Navigation system with CD drive control unit |
| J453 | Multi-function steering wheel control unit |
| J526 | Telephone/telematics control unit |
| T20e | 20-pin connector, black, navigation system with CD drive control unit |
| T46 | 46-pin connector, black, on telephone/telematics control unit |
| A178 | Connection (infotainment CAN bus, high), in dash panel wiring harness |
| A179 | Connection (infotainment CAN bus, low), in dash panel wiring harness |
| * | Only applies to models with navigation system 'NS Low' |
| ** | Only applies to models with telephone/telematics |
| *** | Only applies to models with multi-function steering wheel |
| J402 | Operating electronics control unit, navigation |
| J415 | Navigation/TV tuner |
| R94 | Navigation interface |
| T26 | 26-pin connector, black, radio connector |
| T54 | 54-pin connector, black, on navigation/TV tuner |
| A148 | Connection (navigation CAN bus, high), in dash panel wiring harness |
| A149 | Connection (navigation CAN bus, low), in dash panel wiring harness |
| A178 | Connection (infotainment CAN bus, high), in dash panel wiring harness |
| A179 | Connection (infotainment CAN bus, low), in dash panel wiring harness |
| * | Only applies to models with radio navigation system (RNS-D) |
| ** | Only applies to models with radio navigation system (RNS-D) and TV tuner |
