| G303 | Interior monitor send and receive module 1 |
| J255 | Climatronic control unit |
| J393 | Convenience system central control unit |
| J401 | Navigation system with CD drive control unit |
| J503 | Control unit with display for radio and navigation |
| R | Radio |
| R36 | Telephone transmitter and receiver unit |
| T10o | 10-pin connector |
| T12m | 12-pin connector |
| T12n | 12-pin connector |
| T16 | 16-pin connector |
| T16c | 16-pin connector |
| T16i | 16-pin connector |
| T17 | 17-pin connector |
| T32e | 32-pin connector |
| T54 | 54-pin connector |
| V136 | Rear air distribution control motor |
| A76 | Connection (K-diagnosis wire), in dash panel wiring harness |
| A159 | Connection (L), in dash panel wiring harness |
| B590 | K-diagnosis wire connection, in interior wiring harness |
| * | Up to December 2008 |
| J217 | Automatic gearbox control unit |
| J285 | Control unit in dash panel insert |
| J623 | Engine control unit |
| T16 | 16-pin connector |
| T17d | 17-pin connector |
| T20e | 20-pin connector |
| T32 | 32-pin connector |
| T32a | 32-pin connector |
| T94 | 94-pin connector |
| U31 | Diagnostic connection, on left under dash panel |
| A76 | Connection (K-diagnosis wire), in dash panel wiring harness |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| D166 | Connection (K-diagnosis wire), in engine compartment wiring harness |
| * | Only models with automatic gearbox |
| *2 | Only models with petrol engine |
| *3 | Only models with manual gearbox |
| *4 | see applicable current flow diagram for engine |
| *5 | Only models with diesel engine |
| J104 | ABS control unit |
| J217 | Automatic gearbox control unit |
| J234 | Airbag control unit |
| J623 | Engine control unit |
| T17 | 17-pin connector, in left A-pillar coupling station |
| T17e | 17-pin connector, in plenum chamber |
| T20e | 20-pin connector |
| T38 | 38-pin connector |
| T75 | 75-pin connector |
| T94 | 94-pin connector |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| D159 | Connection (high bus), in engine compartment wiring harness |
| D160 | Connection (low bus), in engine compartment wiring harness |
| * | Only models with automatic gearbox |
| *2 | Only models with manual gearbox |
| *3 | see applicable current flow diagram for engine |
| J446 | Parking aid control unit |
| J502 | Tyre Pressure Monitoring System control unit |
| J527 | Steering column electronics control unit |
| J667 | Output module for left headlight |
| J668 | Output module for right headlight |
| J745 | Control unit for cornering light and headlight range control |
| T14 | 14-pin connector |
| T14a | 14-pin connector |
| T16a | 16-pin connector |
| T16f | 16-pin connector |
| T17a | 17-pin connector, in left A-pillar coupling station |
| T17c | 17-pin connector, in right A-pillar coupling station |
| T18 | 18-pin connector |
| T26 | 26-pin connector |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| A204 | Connection (dash panel insert CAN bus, high), in dash panel wiring harness |
| A205 | Connection (dash panel insert CAN bus, low), in dash panel wiring harness |
| B229 | Connection (high bus), in interior wiring harness |
| B230 | Connection (low bus), in interior wiring harness |
| J255 | Climatronic control unit |
| J386 | Driver door control unit |
| J387 | Front passenger door control unit |
| J393 | Convenience system central control unit |
| T10e | 10-pin connector |
| T10f | 10-pin connector |
| T16b | 16-pin connector |
| T16i | 16-pin connector |
| T20a | 20-pin connector, Right A-pillar |
| T20e | 20-pin connector, in left A-pillar |
| B397 | Connection 1 (convenience CAN bus, high), in main wiring harness |
| B406 | Connection 1 (convenience CAN bus, low), in main wiring harness |
| J136 | Seat and steering column adjustment control unit with memory |
| J345 | Trailer detector control unit |
| J388 | Rear left door control unit |
| J389 | Rear right door control unit |
| T6v | 6-pin connector |
| T10g | 10-pin connector |
| T10h | 10-pin connector |
| T10o | 10-pin connector |
| T20b | 20-pin connector, on left B-pillar |
| T20c | 20-pin connector, on right B-pillar |
| T32e | 32-pin connector |
| B397 | Connection 1 (convenience CAN bus, high), in main wiring harness |
| B398 | Connection 2 (convenience CAN bus, high), in main wiring harness |
| B406 | Connection 1 (convenience CAN bus, low), in main wiring harness |
| B407 | Connection 2 (convenience CAN bus, low), in main wiring harness |
| J401 | Navigation system with CD drive control unit |
| J503 | Control unit with display for radio and navigation |
| R | Radio |
| R36 | Telephone transmitter and receiver unit |
| T16j | 16-pin connector |
| T54 | 54-pin connector |
| A178 | Connection (infotainment CAN bus, high), in dash panel wiring harness |
| A179 | Connection (infotainment CAN bus, low), in dash panel wiring harness |
| B415 | Connection 1 (infotainment CAN bus, high), in main wiring harness |
| B421 | Connection 1 (infotainment CAN bus, low), in main wiring harness |
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