| E | Windscreen wiper switch |
| E2 | Turn signal switch |
| E167 | Steering column adjustment switch |
| F350 | Coil connector |
| G357 | Steering column vertical adjustment sender |
| G358 | Steering column axial adjustment sender |
| H | Horn plate |
| J453 | Multifunction steering wheel control unit |
| J519 | Onboard supply control unit |
| J527 | Steering column electronics control unit |
| J866 | Control unit for electrically adjustable steering column |
| T1g | Single connector |
| T1i | Single connector |
| T4aw | 4-pin connector |
| T4bd | 4-pin connector |
| T6a | 6-pin connector |
| T12f | 12-pin connector |
| T17e | 17-pin connector, red |
| T54b | 54-pin connector, black |
| V123 | Steering column vertical adjustment motor |
| V124 | Steering column axial adjustment motor |
| 752 | Earth point 3, on right A-pillar |
| 884 | Earth connection 1 in steering wheel wiring harness |
| * | see applicable current flow diagram for multifunction steering wheel |
| *2 | Data bus wire (LIN bus) |
| *3 | Only models with cruise control system (CCS) |
| *4 | Data bus wire (FlexRay bus) |
| J217 | Automatic gearbox control unit |
| J519 | Onboard supply control unit |
| J623 | Engine control unit |
| T16a | 16-pin connector, black |
| T73a | 73-pin connector, black |
| T73b | 73-pin connector, black |
| T91 | 91-pin connector, black |
| 369 | Earth connection 4, in main wiring harness |
| B281 | Positive connection 5 (15a) in main wiring harness |
| B284 | Positive connection 8 (15a) in main wiring harness |
| B489 | Connection 25, in main wiring harness |
| * | see applicable current flow diagram for engine |
| *2 | Only models with cruise control system (CCS) |
| E1 | Light switch |
| E20 | Switch and instrument illumination regulator |
| E314 | Rear fog light button |
| E315 | Fog light button |
| E680 | Button for night vision system |
| E736 | Switch for Head-up Display |
| J519 | Onboard supply control unit |
| K4 | Side light warning lamp |
| K13 | Rear fog light warning lamp |
| K17 | Fog light warning lamp |
| L9 | Light switch illumination bulb |
| T4e | 4-pin connector |
| T54b | 54-pin connector, black |
| 135 | Earth connection 2, in dash panel wiring harness |
| 238 | Earth connection 1, in interior wiring harness |
| * | Data bus wire (LIN bus) |
| E229 | Hazard warning lights button |
| E256 | Button for TCS and electronic stabilisation program |
| E266 | Parking aid button |
| E506 | Display unit button |
| E581 | Park assist steering button |
| E618 | Hill descent control button |
| E693 | Start/Stop operation button |
| E709 | Button for extended electric drive mode |
| E735 | Driving mode selection button |
| E791 | Operating unit 1 for driver and convenience functions |
| E797 | Driving mode selection button 2 |
| J519 | Onboard supply control unit |
| K6 | Indicator lamp for hazard warning light |
| K136 | Parking aid warning lamp |
| K241 | Warning light for park assist steering |
| K250 | Warning lamp for hill descent control |
| K259 | Start/Stop operation warning lamp |
| K313 | Warning lamp for extended electric drive mode |
| T5l | 5-pin connector |
| T54b | 54-pin connector, black |
| T73a | 73-pin connector, black |
| * | Only models with start/stop system |
| *2 | Only models with hybrid drive system |
| *3 | Data bus wire (LIN bus) |
| H2 | Treble horn |
| H7 | Bass horn |
| J400 | Wiper motor control unit |
| J519 | Onboard supply control unit |
| T2aa | 2-pin connector |
| T2ab | 2-pin connector |
| T2ft | 2-pin connector |
| T4fr | 4-pin connector, black |
| T73a | 73-pin connector, black |
| T73b | 73-pin connector, black |
| V | Windscreen wiper motor |
| V11 | Headlight washer system pump |
| 374 | Earth connection 9, in main wiring harness |
| 376 | Earth connection 11, in main wiring harness |
| 377 | Earth connection 12, in main wiring harness |
| 655 | Earth point, on left headlight |
| 656 | Earth point, on right headlight |
| B521 | Connection (dual tone horn), in main wiring harness |
| G355 | Humidity sender |
| G397 | Rain and light sensor |
| J519 | Onboard supply control unit |
| SB | Fuse holder B |
| SB2 | Fuse 2 on fuse holder B |
| ST4 | Fuse carrier 4 |
| SB14 | Fuse 14 on fuse holder B |
| T2la | 2-pin connector, black |
| T3bi | 3-pin connector |
| T4d | 4-pin connector |
| T73a | 73-pin connector, black |
| T73b | 73-pin connector, black |
| V5 | Washer pump |
| V12 | Rear window wiper motor |
| 384 | Earth connection 19, in main wiring harness |
| 395 | Earth connection 30, in main wiring harness |
| 667 | Earth point, on rear left of roof |
| 689 | Earth point, at front, central in roof |
| B183 | Connection 1 (washer pump), in interior wiring harness |
| B184 | Connection 2 (washer pump), in interior wiring harness |
| * | see applicable current flow diagram for fuse assignment |
| E26 | Glove compartment light switch |
| J519 | Onboard supply control unit |
| T2ac | 2-pin connector |
| T2fq | 2-pin connector |
| T2fr | 2-pin connector |
| T2fs | 2-pin connector |
| T3a | 3-pin connector |
| T54b | 54-pin connector, black |
| T73a | 73-pin connector, black |
| T73b | 73-pin connector, black |
| W6 | Glove compartment light |
| Z20 | Left washer jet heater element |
| Z21 | Right washer jet heater element |
| Z114 | Centre washer jet heater element |
| 199 | Earth connection 3, in dash panel wiring harness |
| 375 | Earth connection 10, in main wiring harness |
| 397 | Earth connection 32, in main wiring harness |
| 645 | Earth point 1, on bulkhead |
| 687 | Earth point 1, on centre tunnel |
| 821 | Earth connection 7, in dash panel wiring harness |
| B471 | Connection 7, in main wiring harness |
| F266 | Bonnet contact switch |
| F329 | Bonnet contact switch 2 |
| G34 | Front left brake pad wear sender |
| G35 | Front right brake pad wear sender |
| G36 | Rear left brake pad wear sender |
| G37 | Rear right brake pad wear sender |
| J519 | Onboard supply control unit |
| T2fd | 2-pin connector |
| T2fe | 2-pin connector |
| T2ff | 2-pin connector |
| T2fg | 2-pin connector |
| T2lb | 2-pin connector |
| T2y | 2-pin connector |
| T73a | 73-pin connector, black |
| 62 | Earth point, right C-pillar |
| 373 | Earth connection 8, in main wiring harness |
| 380 | Earth connection 15, in main wiring harness |
| 396 | Earth connection 31, in main wiring harness |
| B477 | Connection 13, in main wiring harness |
| B478 | Connection 14, in main wiring harness |
| B479 | Connection 15, in main wiring harness |
| B480 | Connection 16, in main wiring harness |
| B481 | Connection 17, in main wiring harness |
| B482 | Connection 18, in main wiring harness |
| B483 | Connection 19, in main wiring harness |
| B484 | Connection 20, in main wiring harness |
| * | Pre-wired component |
| *2 | gradual introduction |
| *3 | Only models with hybrid drive system |
| *4 | Only models with 2.0l engine |
| E234 | Rear lid handle release button |
| F123 | Rear lid contact switch for anti-theft alarm |
| F124 | Contact switch in lock cylinder for rear lid, anti-theft alarm system and central locking system |
| J393 | Convenience system central control unit |
| T2ko | 2-pin connector, black |
| T2kp | 2-pin connector, black |
| T2kq | 2-pin connector, black |
| T4fq | 4-pin connector, black |
| T20b | 20-pin connector, black |
| T32g | 32-pin connector, black |
| T32h | 32-pin connector, blue |
| V53 | Rear lid central locking motor |
| X4 | Left number plate light |
| X5 | Right number plate light |
| 391 | Earth connection 26, in main wiring harness |
| 392 | Earth connection 27, in main wiring harness |
| B132 | Connection (number plate lights), in interior wiring harness |
| C24 | Suppression filter |
| J393 | Convenience system central control unit |
| M25 | High-level brake light bulb |
| T2lf | 2-pin connector |
| T2lg | 2-pin connector |
| T2lh | 2-pin connector |
| T2li | 2-pin connector |
| T2lj | 2-pin connector |
| T2lk | 2-pin connector |
| T17g | 17-pin connector, brown |
| T32g | 32-pin connector, black |
| W18 | Luggage compartment light on left |
| W35 | Right luggage compartment light |
| W51 | Rear lid light |
| W101 | Rear lid light 2 |
| 52 | Earth point, on left in rear lid |
| 249 | Earth connection 2, in interior wiring harness |
| 387 | Earth connection 22, in main wiring harness |
| B488 | Connection 24, in main wiring harness |
| B733 | Connection 3 (58s), in main wiring harness |
| C18 | Window aerial suppression filter |
| J9 | Heated rear window relay |
| J393 | Convenience system central control unit |
| S41 | Heated rear window single fuse |
| T2eu | 2-pin connector |
| T4hp | 4-pin connector, black |
| T32g | 32-pin connector, black |
| T32h | 32-pin connector, blue |
| V155 | Tank filler flap locking motor |
| Z1 | Heated rear window |
| 385 | Earth connection 20, in main wiring harness |
| 666 | Earth point, on rear right of roof |
| B315 | Positive connection 1 (30a) in main wiring harness |
| * | Pre-wired component |
| *2 | Only models with hybrid drive system |
| *3 | Only models with 2.0l engine |
| F | Brake light switch |
| J393 | Convenience system central control unit |
| L28 | Cigarette lighter illumination bulb |
| L42 | Socket illumination bulb |
| SB | Fuse holder B |
| ST1 | Fuse carrier 1 |
| SB5 | Fuse 5 on fuse holder B |
| S132 | Fuse 2 |
| T3bo | 3-pin connector |
| T4ak | 4-pin connector |
| T32g | 32-pin connector, black |
| U1 | Cigarette lighter |
| U5 | 12 V socket |
| A3 | Positive connection (58), in dash panel wiring harness |
| A175 | Connection (58s), in dash panel wiring harness |
| B301 | Positive connection 5 (30), in main wiring harness |
| B335 | Connection 1 (54), in main wiring harness |
| * | see applicable current flow diagram for fuse assignment |
| *2 | Only smoker version models |
| *3 | on the battery |
| L42 | Socket illumination bulb |
| T3bm | 3-pin connector |
| T3bn | 3-pin connector |
| T3bq | 3-pin connector |
| U18 | 12 V socket 2, in rear centre console |
| U19 | 12 V socket 3, in rear centre console |
| U20 | 12 V socket 4, in luggage compartment |
| 393 | Earth connection 28, in main wiring harness |
| 688 | Earth point 2, on centre tunnel |
| B680 | Connection (electric socket), in interior wiring harness |
| B732 | Connection 2 (58s), in main wiring harness |
| * | Pre-wired component |
| *2 | According to equipment |
| E326 | Front interior light button |
| E454 | Rear left reading light button |
| E455 | Rear right reading light button |
| E633 | Front left reading light button |
| E634 | Front right reading light button |
| J528 | Roof electronics control unit |
| J530 | Garage door operation control unit |
| T5bn | 5-pin connector, black |
| T5bo | 5-pin connector, brown |
| T5d | 5-pin connector, black |
| T6bc | 6-pin connector, black |
| T8l | 8-pin connector, black |
| T16p | 16-pin connector, black |
| WX3 | Front roof module |
| W11 | Rear left reading light |
| W12 | Rear right reading light |
| W65 | Front left reading light |
| W66 | Front right reading light |
| Y7 | Automatic anti-dazzle interior mirror |
| B549 | Connection 2 (LIN bus) in main wiring harness |
| * | Only models with panoramic sliding sunroof |
| *2 | Data bus wire (LIN bus) |
| E493 | Dash panel insert operating buttons |
| G1 | Fuel gauge |
| J285 | Control unit in dash panel insert |
| K47 | ABS warning lamp |
| K75 | Airbag warning lamp |
| K104 | Diesel electronics warning lamp |
| K118 | Brake system warning lamp |
| K139 | Handbrake warning lamp |
| K149 | Engine electronics warning lamp |
| T4aa | 4-pin connector, black |
| T32a | 32-pin connector, grey |
| Y24 | Display in dash panel insert |
| 332 | Earth connection 4, 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 |
| * | gradual introduction |
| J285 | Control unit in dash panel insert |
| J794 | Control unit 1 for information electronics |
| K31 | Cruise control system warning lamp |
| K232 | Lane change assist warning lamp |
| K261 | Warning lamp for left turn signal |
| K262 | Warning lamp for right turn signal |
| T2ls | 2-pin connector, black |
| T2r | 2-pin connector, black |
| T4b | 4-pin connector, black |
| T4ef | 4-pin connector, yellow |
| T12n | 12-pin connector, grey |
| T32a | 32-pin connector, grey |
| B159 | Connection (diagnosis), in interior wiring harness |
| * | According to equipment |
| *2 | see applicable current flow diagram for infotainment MOST bus |
| *3 | Fibre optic cable (FOC) |
| J533 | Data bus diagnostic interface |
| T54a | 54-pin connector, black |
| B397 | Connection 1 (convenience CAN bus, high), in main wiring harness |
| B398 | Connection 2 (convenience CAN bus, high), in main wiring harness |
| B402 | Connection 6 (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 |
| B411 | Connection 6 (convenience CAN bus, low), in main wiring harness |
| * | Data bus wire (FlexRay bus) |
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