| J533 | Data bus diagnostic interface |
| SC | Fuse holder C |
| SC5 | Fuse 5 on fuse holder C |
| SC8 | Fuse 8 on fuse holder C |
| SC35 | Fuse 35 on fuse holder C |
| T16 | 16-pin connector, black |
| T20 | 20-pin connector, red |
| U31 | Diagnostic connection |
| |
| 238 | Earth connection 1, in interior wiring harness |
| 277 | Earth connection 3, in interior wiring harness |
| 286 | Earth connection 8, in interior wiring harness |
| A1 | Positive connection (30a), in dash panel wiring harness |
| A20 | Positive connection (15a), in dash panel wiring harness |
| A192 | Positive connection 3 (15a) in dash panel wiring harness |
| B713 | Connection 1 (CAN bus diagnosis, high), in main wiring harness |
| B714 | Connection 1 (CAN bus diagnosis, low), in main wiring harness |
| * | Up to June 2015 |
| *2 | From June 2015 |
| J250 | Electronically controlled damping control unit |
| J446 | Parking aid control unit |
| J533 | Data bus diagnostic interface |
| J745 | Control unit for cornering light and headlight range control |
| SB | Fuse holder B |
| SB18 | Fuse 18 on fuse holder B |
| T17d | 17-pin connector, black |
| T17g | 17-pin connector, blue |
| T17l | 17-pin connector, black |
| T17o | 17-pin connector, blue |
| T20 | 20-pin connector, red |
| T26h | 26-pin connector, black |
| T26i | 26-pin connector, black |
| T47d | 47-pin connector, black |
| TIUL | Coupling point in interior, below left |
| B108 | Connection 1 (CAN bus extended high), in main wiring harness |
| B109 | Connection 1 (CAN bus extended low), in main wiring harness |
| B663 | Connection (running gear sensors CAN bus, high), in main wiring harness |
| B664 | Connection (running gear sensors CAN bus, low), in main wiring harness |
| B668 | Connection 2 (CAN bus extended high), in main wiring harness |
| B669 | Connection 2 (CAN bus extended low), in main wiring harness |
| * | According to equipment |
| EX5 | Interior mirror |
| E313 | Selector lever |
| J217 | Automatic gearbox control unit |
| J234 | Airbag control unit |
| J533 | Data bus diagnostic interface |
| J743 | Mechatronic unit for dual clutch gearbox |
| J794 | Control unit 1 for information electronics |
| J844 | Main beam assist control unit |
| J1086 | Blind spot monitor control unit |
| J1087 | Blind Spot Monitor control unit 2 |
| T8bg | 8-pin connector, black |
| T8br | 8-pin connector, black |
| T8bs | 8-pin connector, black |
| T10s | 10-pin connector, black |
| T12al | 12-pin connector, grey |
| T17e | 17-pin connector, brown |
| T17m | 17-pin connector, brown |
| T20 | 20-pin connector, red |
| T20a | 20-pin connector, black |
| T52 | 52-pin connector, black |
| T90 | 90-pin connector |
| TIUL | Coupling point in interior, below left |
| A178 | Connection (infotainment CAN bus, high), in dash panel wiring harness |
| A179 | Connection (infotainment CAN bus, low), in dash panel wiring harness |
| B108 | Connection 1 (CAN bus extended high), in main wiring harness |
| B109 | Connection 1 (CAN bus extended low), in main wiring harness |
| B383 | Connection 1 (powertrain CAN bus, high), in main wiring harness |
| B384 | Connection 2 (powertrain CAN bus, high), in main wiring harness |
| B390 | Connection 1 (powertrain CAN bus, low), in main wiring harness |
| B391 | Connection 2 (powertrain CAN bus, low), in main wiring harness |
| CX1 | Alternator with voltage regulator |
| J104 | ABS control unit |
| J367 | Battery monitor control unit |
| J428 | Adaptive cruise control unit |
| J533 | Data bus diagnostic interface |
| J623 | Engine control unit |
| R242 | Front camera for driver assist systems |
| T2bn | 2-pin connector, yellow |
| T4dd | 4-pin connector, black |
| T4de | 4-pin connector, black |
| T8ay | 8-pin connector, black |
| T12ar | 12-pin connector, black |
| T17e | 17-pin connector, brown |
| T17m | 17-pin connector, brown |
| T94 | 94-pin connector, black |
| TIUL | Coupling point in interior, below left |
| TML | Coupling point in engine compartment, left |
| A227 | Connection 2 (LIN bus) in dash panel wiring harness |
| B384 | Connection 2 (powertrain CAN bus, high), in main wiring harness |
| B391 | Connection 2 (powertrain CAN bus, low), in main wiring harness |
| B672 | Connection 1 (running gear/dash panel insert CAN bus, high), in main wiring harness |
| B676 | Connection 1 (running gear/dash panel insert CAN bus, low), in main wiring harness |
| B698 | Connection 3 (LIN bus) in main wiring harness |
| * | see applicable current flow diagram for ABS |
| *2 | see applicable current flow diagram for engine |
| *3 | According to equipment |
| J500 | Power steering control unit |
| J533 | Data bus diagnostic interface |
| J965 | Interface for entry and start system |
| T3bq | 3-pin connector, black |
| T6cj | 6-pin connector, black |
| T6cq | 6-pin connector, black |
| T10kv | 10-pin connector, black |
| T10kw | 10-pin connector, black |
| T20 | 20-pin connector, red |
| T32b | 32-pin connector, blue |
| TML | Coupling point in engine compartment, left |
| B398 | Connection 2 (convenience CAN bus, high), in main wiring harness |
| B407 | Connection 2 (convenience CAN bus, low), in main wiring harness |
| B672 | Connection 1 (running gear/dash panel insert CAN bus, high), in main wiring harness |
| B676 | Connection 1 (running gear/dash panel insert CAN bus, low), in main wiring harness |
| * | Only models with petrol engine |
| *2 | Only models with diesel engine |
| EX21 | Heater and air conditioning controls |
| G397 | Rain and light sensor |
| J519 | Onboard supply control unit |
| J527 | Steering column electronics control unit |
| J533 | Data bus diagnostic interface |
| J764 | Control unit for electronic steering column lock |
| J949 | Emergency call module control unit and communication unit |
| KX2 | Dash panel insert |
| T3ae | 3-pin connector, black |
| T16r | 16-pin connector, black |
| T16s | 16-pin connector, black |
| T18 | 18-pin connector, black |
| T20 | 20-pin connector, red |
| T20d | 20-pin connector, black |
| T26 | 26-pin connector, black |
| T73a | 73-pin connector, black |
| T73c | 73-pin connector, black |
| B398 | Connection 2 (convenience CAN bus, high), in main wiring harness |
| B407 | Connection 2 (convenience CAN bus, low), in main wiring harness |
| B506 | Connection (convenience CAN bus, high), in interior wiring harness |
| B507 | Connection (convenience CAN bus, low), in interior wiring harness |
| B549 | Connection 2 (LIN bus) in main wiring harness |
| * | Up to June 2015 |
| *2 | From June 2015 |
| G578 | Anti-theft alarm sensor |
| H12 | Alarm horn |
| J245 | Sliding sunroof adjustment control unit |
| J386 | Driver door control unit |
| J387 | Front passenger door control unit |
| J394 | Sunroof roller blind control unit |
| J400 | Wiper motor control unit |
| J519 | Onboard supply control unit |
| T3af | 3-pin connector, black |
| T4p | 4-pin connector, black |
| T4q | 4-pin connector, black |
| T6cp | 6-pin connector, black |
| T6cr | 6-pin connector, black |
| T10ab | 10-pin connector, black |
| T10kq | 10-pin connector, black |
| T10kr | 10-pin connector, black |
| T10le | 10-pin connector, black |
| T16j | 16-pin connector, brown |
| T16k | 16-pin connector, brown |
| T19 | 19-pin connector, black |
| T19a | 19-pin connector |
| T19b | 19-pin connector, black |
| T19c | 19-pin connector, black |
| T20b | 20-pin connector, black |
| T20c | 20-pin connector, black |
| T27 | 27-pin connector, black |
| T27a | 27-pin connector, black |
| T27b | 27-pin connector, black |
| T27c | 27-pin connector, black |
| T46b | 46-pin connector, black |
| T73a | 73-pin connector, black |
| TH | Coupling point for roof |
| THM | Coupling point for roof, centre |
| TTHL | Coupling point on rear left door |
| TTHR | Coupling point on rear right door |
| TTVL | Coupling point on front left door |
| TTVR | Coupling point on front right door |
| V26 | Rear left window regulator motor |
| V27 | Rear right window regulator motor |
| B506 | Connection (convenience CAN bus, high), in interior wiring harness |
| B507 | Connection (convenience CAN bus, low), in interior wiring harness |
| B528 | Connection 1 (LIN bus) in main wiring harness |
| B577 | LIN bus connection, in roof wiring harness |
| * | For models with anti-theft alarm system |
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