| F387 | Bonnet contact switch |
| G17 | Ambient temperature sensor |
| G32 | Coolant shortage indicator sender |
| H2 | Treble horn |
| H7 | Bass horn |
| J413 | Horn relay |
| J519 | Onboard supply control unit |
| T2am | 2-pin connector |
| T2av | 2-pin connector |
| T2aw | 2-pin connector |
| T2ca | 2-pin connector |
| T2cj | 2-pin connector |
| T46b | 46-pin connector |
| 85 | Earth connection 1, in engine compartment wiring harness |
| 104 | Earth connection in front right wiring harness - sensor earth - |
| 129 | Earth connection, in dual tone horn wiring harness |
| 176 | Earth connection, in right headlight wiring harness |
| 643 | Earth point 3, on right in engine compartment |
| C13 | Positive connection in dual tone horn wiring harness |
| * | Cross section depends on equipment |
| *2 | According to equipment |
| EX5 | Interior mirror |
| E386 | Anti-dazzle interior mirror button |
| G33 | Windscreen washer fluid level sender |
| J519 | Onboard supply control unit |
| T2aq | 2-pin connector |
| T2bo | 2-pin connector |
| T6b | 6-pin connector |
| T8ap | 8-pin connector |
| T46b | 46-pin connector |
| T73a | 73-pin connector |
| T73c | 73-pin connector |
| V5 | Washer pump |
| WX1 | Front interior light |
| Y7 | Automatic anti-dazzle interior mirror |
| 104 | Earth connection in front right wiring harness - sensor earth - |
| A13 | Connection (door contact switch), in dash panel wiring harness |
| A116 | Connection 2 (58d), in dash panel wiring harness |
| B242 | Connection (interior mirror - negative), in interior wiring harness |
| W71 | Connection (reversing light), in rear wiring harness |
| * | Only models with sliding/tilting sunroof |
| *2 | According to equipment |
| *3 | Cross section depends on equipment |
| E26 | Glove compartment light switch |
| F147 | Driver vanity mirror contact switch |
| F148 | Front passenger vanity mirror contact switch |
| J519 | Onboard supply control unit |
| T2ce | 2-pin connector |
| T2ck | 2-pin connector |
| T2k | 2-pin connector |
| T2l | 2-pin connector |
| T2w | 2-pin connector |
| T2x | 2-pin connector |
| T3af | 3-pin connector |
| T73a | 73-pin connector |
| T73c | 73-pin connector |
| W3 | Luggage compartment light |
| W6 | Glove compartment light |
| W14 | Front passenger side illuminated vanity mirror |
| W20 | Driver side illuminated vanity mirror |
| 249 | Earth connection 2, in interior wiring harness |
| 347 | Earth connection, in roof wiring harness |
| 638 | Earth point, on right A-pillar |
| A29 | Connection (interior light), in dash panel wiring harness |
| B465 | Connection 1, in main wiring harness |
| B533 | Connection 1 (DCt), in roof wiring harness |
| EX1 | Rotary light switch |
| E1 | Light switch |
| EX14 | Headlight range control and instrument illumination regulator |
| E20 | Switch and instrument illumination regulator |
| J519 | Onboard supply control unit |
| SC35 | Fuse 35 on fuse holder C |
| T5ac | 5-pin connector |
| T7a | 7-pin connector |
| T10h | 10-pin connector |
| T16j | 16-pin connector |
| T16k | 16-pin connector |
| T17d | 17-pin connector |
| T17l | 17-pin connector |
| TH | Coupling point for roof |
| TIUL | Coupling point in interior, below left |
| WX2 | Rear interior light |
| 277 | Earth connection 3, in interior wiring harness |
| 347 | Earth connection, in roof wiring harness |
| A19 | Connection (58d), in dash panel wiring harness |
| A20 | Positive connection (15a), in dash panel wiring harness |
| B533 | Connection 1 (DCt), in roof wiring harness |
| R5 | Connection 2, in interior light wiring harness |
| F34 | Brake fluid level warning contact |
| J400 | Wiper motor control unit |
| J519 | Onboard supply control unit |
| L22 | Left fog light bulb |
| SB19 | Fuse 19 on fuse holder B |
| T2bc | 2-pin connector |
| T2bq | 2-pin connector |
| T4q | 4-pin connector |
| T46b | 46-pin connector |
| T73a | 73-pin connector |
| T73c | 73-pin connector |
| V | Windscreen wiper motor |
| 44 | Earth point, lower part of left A-pillar |
| 131 | Earth connection 2, in engine compartment wiring harness |
| 179 | Earth connection, in left headlight wiring harness |
| 238 | Earth connection 1, in interior wiring harness |
| 286 | Earth connection 8, in interior wiring harness |
| 673 | Earth point 3, on front of left longitudinal member |
| C69 | Front left connection (fog light),, in main wiring harness |
| * | Only models with Coming Home function |
| *2 | Cross section depends on equipment |
| J519 | Onboard supply control unit |
| L174 | Left daytime running light bulb |
| MX1 | Front left headlight |
| M5 | Front left turn signal bulb |
| M29 | Left headlight dipped beam bulb |
| M30 | Left headlight main beam bulb |
| T10e | 10-pin connector |
| T17f | 17-pin connector |
| T17n | 17-pin connector |
| T46b | 46-pin connector |
| T73c | 73-pin connector |
| TIUL | Coupling point in interior, below left |
| V48 | Left headlight range control motor |
| 179 | Earth connection, in left headlight wiring harness |
| 288 | Earth connection (HRC), in dash panel wiring harness |
| B455 | Connection (HRC), in main wiring harness |
| C12 | Positive connection 1, in headlight wiring harness |
| * | According to equipment |
| J519 | Onboard supply control unit |
| L23 | Right fog light bulb |
| L175 | Right daytime running light bulb |
| MX2 | Front right headlight |
| M7 | Front right turn signal bulb |
| M31 | Right headlight dipped beam bulb |
| M32 | Right headlight main beam bulb |
| T2bd | 2-pin connector |
| T10d | 10-pin connector |
| T46b | 46-pin connector |
| V49 | Right headlight range control motor |
| 288 | Earth connection (HRC), in dash panel wiring harness |
| B455 | Connection (HRC), in main wiring harness |
| C12 | Positive connection 1, in headlight wiring harness |
| D59 | Connection (fog light), in engine compartment wiring harness |
| * | According to equipment |
| *2 | Cross section depends on equipment |
| *3 | Wiring colour depends on equipment |
| E2 | Turn signal switch |
| E4 | Headlight dipper and flasher switch |
| E45 | Cruise control system switch |
| E227 | Cruise control system (CCS) SET button |
| E313 | Selector lever |
| F189 | Tiptronic switch |
| J519 | Onboard supply control unit |
| J527 | Steering column electronics control unit |
| N376 | Ignition key withdrawal lock solenoid |
| T2el | 2-pin connector |
| T8ae | 8-pin connector |
| T8af | 8-pin connector |
| T8q | 8-pin connector |
| T9a | 9-pin connector |
| T9b | 9-pin connector |
| T10s | 10-pin connector |
| T16r | 16-pin connector |
| * | According to equipment |
| *2 | Only models with dual clutch gearbox |
| *3 | Only models with 6-speed automatic gearbox and Tiptronic |
| *4 | Wiring colour depends on equipment |
| EX21 | Heater and air conditioning controls |
| G92 | Potentiometer for temperature flap control motor |
| G645 | Potentiometer for air distribution flap control motor |
| J519 | Onboard supply control unit |
| T6aj | 6-pin connector |
| T6m | 6-pin connector |
| T16c | 16-pin connector |
| V68 | Temperature flap control motor |
| V428 | Air distribution flap control motor |
| L7 | Connection 3, in evaporator housing unit wiring harness |
| L8 | Connection 4, in evaporator housing unit wiring harness |
| J519 | Onboard supply control unit |
| MX3 | Left tail light |
| MX4 | Right tail light |
| M6 | Rear left turn signal bulb |
| M8 | Rear right turn signal bulb |
| M21 | Left brake and tail light bulb |
| M22 | Right brake and tail light bulb |
| T2ce | 2-pin connector |
| T4n | 4-pin connector |
| T4o | 4-pin connector |
| T10la | 10-pin connector |
| T10lf | 10-pin connector |
| T73a | 73-pin connector |
| T73c | 73-pin connector |
| THRR | Coupling point in luggage compartment, right |
| X4 | Left number plate light |
| 197 | Earth connection 4, in rear wiring harness |
| 333 | Earth connection 5, in rear wiring harness |
| 470 | Earth connection 1, in rear bumper wiring harness |
| B131 | Connection (54), in interior wiring harness |
| B185 | Connection 2 (54), in interior wiring harness |
| X150 | Connection (58), rear bumper wiring harness |
| * | According to equipment |
| J9 | Heated rear window relay |
| J519 | Onboard supply control unit |
| M25 | High-level brake light bulb |
| R177 | Amplitude modulation (AM) frequency filter |
| R178 | Frequency modulation (FM) frequency filter in negative wire |
| R179 | Frequency modulation (FM) frequency filter in positive wire |
| T2cd | 2-pin connector |
| T2cf | 2-pin connector |
| T4u | 4-pin connector |
| T10d | 10-pin connector |
| T10p | 10-pin connector |
| T73a | 73-pin connector |
| T73c | 73-pin connector |
| THK | Coupling point on rear lid |
| V12 | Rear window wiper motor |
| X5 | Right number plate light |
| Z1 | Heated rear window |
| 98 | Earth connection, in rear lid wiring harness |
| 285 | Earth connection 7, in interior wiring harness |
| 470 | Earth connection 1, in rear bumper wiring harness |
| W33 | Connection (reversing light), in rear lid wiring harness |
| X150 | Connection (58), rear bumper wiring harness |
| * | Cross section depends on equipment |
| F219 | Fuel tank filler flap central locking actuator |
| J519 | Onboard supply control unit |
| L46 | Rear left fog light bulb |
| L47 | Rear right fog light bulb |
| M2 | Right tail light bulb |
| M4 | Left tail light bulb |
| MX5 | Left tail light 2 |
| MX6 | Right tail light 2 |
| M16 | Left reversing light bulb |
| M17 | Right reversing light bulb |
| SC47 | Fuse 47 on fuse holder C |
| T2ct | 2-pin connector |
| T5c | 5-pin connector |
| T5e | 5-pin connector |
| T10l | 10-pin connector |
| T10n | 10-pin connector |
| T73a | 73-pin connector |
| T73c | 73-pin connector |
| THK | Coupling point on rear lid |
| 98 | Earth connection, in rear lid wiring harness |
| Q158 | Connection (RL) in rear lid wiring harness |
| W11 | Connection (58), in rear lid wiring harness |
| * | Only models with reversing camera system |
| *2 | Cross section depends on equipment |
| J519 | Onboard supply control unit |
| J533 | Data bus diagnostic interface |
| KX2 | Dash panel insert |
| K32 | Brake pad warning lamp |
| K155 | Warning lamp for electronic stabilisation program and TCS |
| SC17 | Fuse 17 on fuse holder C |
| T18 | 18-pin connector |
| T20 | 20-pin connector |
| T73a | 73-pin connector |
| 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 |
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