| J... | Engine control units |
| J104 | ABS control unit |
| J217 | Automatic gearbox control unit |
| J234 | Airbag control unit |
| T17 | 17-pin connector, black, coupling station on left of A-pillar |
| T17e | 17-pin connector, white, coupling station on electronics box, plenum chamber |
| 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 |
| * | ⇒ applicable engine Current Flow Diagram |
| ** | ⇒ applicable Current Flow Diagram: automatic gearbox |
| J431 | Headlight range control, control unit |
| J527 | Steering column electronics control unit |
| T16 | 16-pin connector, black, diagnostic connector |
| T16a | 16-pin connector, black, on steering column electronics control unit |
| T17a | 17-pin connector, red, coupling station on left of A-pillar |
| T17c | 17-pin connector, red, coupling station on right of A-pillar |
| V318 | Left dynamic cornering light control motor |
| V319 | Right dynamic cornering light control motor |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| B229 | Connection (high bus), in interior wiring harness |
| B230 | Connection (low bus), in interior wiring harness |
| J285 | Control unit in dash panel insert |
| J527 | Steering column electronics control unit |
| T16a | 16-pin connector, black, on steering column electronics control unit |
| T32 | 32-pin connector, blue, on dash panel insert |
| T32a | 32-pin connector, green, on dash panel insert |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| A146 | Connection (convenience CAN bus, high), in dash panel wiring harness |
| A147 | Connection (convenience 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 |
| J345 | Trailer detector control unit |
| J446 | Parking aid control unit |
| J519 | Onboard supply control unit |
| T16f | 16-pin connector, brown, on parking aid control unit |
| T32b | 32-pin connector, grey, on onboard supply control unit |
| V26 | Rear left window regulator motor |
| V27 | Rear right window regulator motor |
| A146 | Connection (convenience CAN bus, high), in dash panel wiring harness |
| A147 | Connection (convenience 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 |
| J255 | Climatronic control unit |
| J256 | Convertible roof actuation control unit |
| J386 | Driver door control unit |
| J387 | Front passenger door control unit |
| T10e | 10-pin connector, black, on door control unit, driver door |
| T10f | 10-pin connector, black, on door control unit, front passenger door |
| T20 | 20-pin connector, black, door A-pillar left |
| T20a | 20-pin connector, black, door A-pillar right |
| A146 | Connection (convenience CAN bus, high), in dash panel wiring harness |
| A147 | Connection (convenience 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 |
| J... | Engine control units |
| J136 | Seat and steering column adjustment control unit with memory function |
| J393 | Convenience system central control unit |
| J572 | Driver side easy entry control unit |
| J573 | Front passenger side easy entry control unit |
| T10o | 10-pin connector, red, coupling station seat wiring, driver seat |
| T10p | 10-pin connector, red, coupling station seat wiring, front passenger seat |
| T16i | 16-pin connector, brown, on convenience system central control unit |
| T32e | 32-pin connector, on seat adjustment with memory control unit |
| T32g | 32-pin connector, white, on driver side easy entry control unit |
| T32h | 32-pin connector, white, on front passenger side easy entry control unit |
| A146 | Connection (convenience CAN bus, high), in dash panel wiring harness |
| A147 | Connection (convenience 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 |
| M27 | Connection (convenience CAN bus, high), in driver seat adjustment wiring harness |
| M28 | Connection (convenience CAN bus, low), in driver seat adjustment wiring harness |
| * | for models with electric seat adjustment and memory function only |
| J401 | Navigation system with CD drive control unit |
| J402 | Navigation operating electronics control unit |
| J415 | Navigation system tuner for TV |
| J503 | Control unit with display for radio and navigation system |
| R | Radio |
| R36 | Telephone transmitter and receiver unit |
| T16j | 16-pin connector, black, on navigation operating electronics control unit, connector D |
| T20d | 20-pin connector, black, radio connector I |
| T54 | 54-pin connector, black, on navigation system tuner for TV |
| A178 | Connection (infotainment CAN bus, high), in dash panel wiring harness |
| A179 | Connection (infotainment CAN bus, low), in dash panel wiring harness |
| * | for models with radio navigation system RNS-E only |
| ** | for models with radio navigation system RNS-low only |
| *** | only for models with radio, applicable up to October 2006 |
| **** | only for models with radio, applicable from November 2006 |
| # | for models with radio navigation system (Japan) only |
