| J386 | Driver door control unit |
| J387 | Front passenger door control unit |
| J388 | Rear left door control unit |
| J389 | Rear right door control unit |
| J393 | Convenience system central control unit, on left behind dash panel |
| T10i | 10-pin connector, black, left A-pillar coupling station |
| T10k | 10-pin connector, black, right A-pillar coupling station |
| T10l | 10-pin connector, black, left B-pillar coupling station |
| T10m | 10-pin connector, black, right B-pillar coupling station |
| T18a | 18-pin connector |
| T18b | 18-pin connector |
| T23 | 23-pin connector |
| T29 | 29-pin connector |
| T29a | 29-pin connector |
| B229 | Connection (high bus), in interior wiring harness |
| B230 | Connection (low bus), in interior wiring harness |
| D | Ignition/starter switch |
| J285 | Display control unit, in dash panel insert |
| J... | Engine control units |
| S5 | Fuse 5 in fuse holder |
| S12 | Fuse 12 in fuse holder |
| T10 | 10-pin connector, orange, in protective housing for connectors on left in plenum chamber |
| T16 | 16-pin connector, centre in dash panel, self-diagnosis connection |
| T32 | 32-pin connector, blue |
| T32a | 32-pin connector, green |
| 42 | Earth point, next to steering column |
| 49 | Earth point, on steering column |
| 81 | Earth connection 1, in dash panel wiring harness |
| 135 | Earth connection 2, in dash panel wiring harness |
| 501 | Screw connection 2 (30), on relay plate |
| A2 | Positive connection (15), in dash panel wiring harness |
| A20 | Connection (15a), in dash panel wiring harness |
| A76 | Connection (K-diagnosis wire), in dash panel wiring harness |
| G85 | Steering angle sender, on steering column |
| J234 | Airbag control unit |
| J533 | Data bus diagnosis interface, in dash panel insert |
| T6a | 6-pin connector |
| T32a | 32-pin connector, green |
| T75 | 75-pin connector |
| 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 |
| J104 | ABS with EDL control unit |
| J217 | Automatic gearbox control unit |
| J220 | Motronic control unit |
| J248 | Diesel direct injection system control unit |
| J361 | Simos control unit |
| J448 | 4AV/4LV/4MV injection system control unit |
| J492 | All-wheel drive control unit, near rear final drive |
| J743 | Mechatronic unit for dual clutch gearbox, in gearbox |
| T8 | 8-pin connector |
| T10w | 10-pin connector, white, in protective housing for connectors on left in plenum chamber |
| T20e | 20-pin connector |
| T25 | 25-pin connector, on ABS/ABS with EDL control unit |
| T47a | 47-pin connector, on ABS/ABS with EDL/TCS/ESP control unit |
| T68 | 68-pin connector, models with 4-speed automatic gearbox (AG4) |
| T68a | 68-pin connector, models with 5-speed automatic gearbox (AG5) |
| T80 | 80-pin connector |
| T121 | 121-pin connector |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |