| A | Battery |
| C | Alternator |
| J368 | Wiper motor switch-over relay 1 |
| J369 | Wiper motor switch-over relay 2 |
| J519 | Onboard supply control unit |
| SA1 | Fuse 1 in fuse holder A |
| SA4 | Fuse 4 in fuse holder A |
| SB | Fuse holder B |
| SB19 | Fuse 19 on fuse holder B |
| SB28 | Fuse 28 on fuse holder B |
| SB29 | Fuse 29 on fuse holder B |
| T52a | 52-pin connector |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| 12 | Earth point, on left in engine compartment |
| 108 | Earth connection 2, in front left wiring harness |
| 508 | Threaded connection (30) on E-box |
| B111 | Positive connection 1 (30a), in interior wiring harness |
| B316 | Positive connection 2 (30a) in main wiring harness |
| B684 | Positive connection 24 (30a) in main wiring harness |
| J234 | Airbag control unit |
| J519 | Onboard supply control unit |
| J681 | Terminal 15 voltage supply relay 2 |
| J682 | Terminal 50 voltage supply relay |
| K145 | Front passenger side airbag deactivated warning lamp |
| SB | Fuse holder B |
| SB10 | Fuse 10 on fuse holder B |
| SB20 | Fuse 20 on fuse holder B |
| SB25 | Fuse 25 on fuse holder B |
| SB30 | Fuse 30 on fuse holder B |
| SC | Fuse holder C |
| SC9 | Fuse 9 on fuse holder C |
| SC14 | Fuse 14 on fuse holder C |
| SC15 | Fuse 15 on fuse holder C |
| SC16 | Fuse 16 on fuse holder C |
| T9c | 9-pin connector |
| T9f | 9-pin connector |
| T52b | 52-pin connector |
| T75 | 75-pin connector |
| A200 | Positive connection 5 (15a) in dash panel wiring harness |
| A217 | Positive connection 8 (15a) in dash panel wiring harness |
| B163 | Positive connection 1 (15), in interior wiring harness |
| B316 | Positive connection 2 (30a) in main wiring harness |
| J519 | Onboard supply control unit |
| SC | Fuse holder C |
| SC1 | Fuse 1 on fuse holder C |
| SC3 | Fuse 3 on fuse holder C |
| SC13 | Fuse 13 on fuse holder C |
| SC20 | Fuse 20 on fuse holder C |
| SC21 | Fuse 21 on fuse holder C |
| SC22 | Fuse 22 on fuse holder C |
| SC23 | Fuse 23 on fuse holder C |
| SC35 | Fuse 35 on fuse holder C |
| SC36 | Fuse 36 on fuse holder C |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| A32 | Positive connection (30), in dash panel wiring harness |
| A189 | Positive connection 5 (30a) in dash panel wiring harness |
| A217 | Positive connection 8 (15a) in dash panel wiring harness |
| B163 | Positive connection 1 (15), in interior wiring harness |
| B169 | Positive connection 1 (30), in interior wiring harness |
| B170 | Positive connection 2 (30), in interior wiring harness |
| B171 | Positive connection 3 (30), in interior wiring harness |
| B172 | Positive connection 4 (30), in interior wiring harness |
| B315 | Positive connection 1 (30a) in main wiring harness |
| * | Up to May 2013 |
| *2 | Cross section depends on equipment |
| J245 | Sliding sunroof adjustment control unit |
| J519 | Onboard supply control unit |
| J680 | Terminal 75 voltage supply relay 1 |
| L23 | Right fog light bulb |
| L149 | Right cornering light bulb |
| SC | Fuse holder C |
| SC30 | Fuse 30 on fuse holder C |
| SC33 | Fuse 33 on fuse holder C |
| SC44 | Fuse 44 on fuse holder C |
| SC51 | Fuse 51 on fuse holder C |
| SC58 | Fuse 58 on fuse holder C |
| T2dh | 2-pin connector |
| T9x | 9-pin connector |
| T10e | 10-pin connector |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| 121 | Earth connection 2, in front right wiring harness |
| B219 | Positive connection 4 (30a), in interior wiring harness |
| B554 | Connection (fog light), in main wiring harness |
| * | Cross section depends on equipment |
| *2 | Only models with dual tone horn |
| *3 | Only models with dual clutch gearbox (DSG) |
| *4 | Up to May 2013 |
| J519 | Onboard supply control unit |
| L22 | Left fog light bulb |
| L148 | Left cornering light bulb |
| L174 | Left daytime running light bulb |
| M1 | Left side light bulb |
| MX1 | Front left headlight |
| M5 | Front left turn signal bulb |
| M29 | Left headlight dipped beam bulb |
| M30 | Left headlight main beam bulb |
| T2dg | 2-pin connector |
| T10l | 10-pin connector |
| T52a | 52-pin connector |
| T52c | 52-pin connector |
| V48 | Left headlight range control motor |
| 179 | Earth connection, in left headlight wiring harness |
| 376 | Earth connection 11, in main wiring harness |
| 655 | Earth point, on left headlight |
| B522 | Connection (FL), in main wiring harness |
| * | According to equipment |
| *2 | Up to May 2013 |
| *3 | Cross section depends on equipment |
| *4 | From June 2013 |
| E20 | Switch and instrument illumination regulator |
| E102 | Headlight range control regulator |
| J519 | Onboard supply control unit |
| L76 | Button illumination bulb |
| L175 | Right daytime running light bulb |
| MX2 | Front right headlight |
| M3 | Right side light bulb |
| M7 | Front right turn signal bulb |
| M31 | Right headlight dipped beam bulb |
| M32 | Right headlight main beam bulb |
| T8e | 8-pin connector |
| T10r | 10-pin connector |
| T52a | 52-pin connector |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| V49 | Right headlight range control motor |
| B149 | Positive connection 2 (15a), in interior wiring harness |
| B457 | Connection 1 (potentiometer), in main wiring harness |
| * | According to equipment |
| *2 | From July 2012 |
| *3 | Wiring colour depends on equipment |
| *4 | Up to May 2013 |
| *5 | Cross section depends on equipment |
| *6 | Only models with auxiliary coolant heater |
| *7 | From June 2013 |
| E1 | Light switch |
| E7 | Fog light switch |
| E18 | Rear fog light switch |
| J519 | Onboard supply control unit |
| K17 | Fog light warning lamp |
| K209 | Automatic control of lights warning lamp |
| L9 | Light switch illumination bulb |
| T10h | 10-pin connector |
| T52a | 52-pin connector |
| T52b | 52-pin connector |
| 388 | Earth connection 23, in main wiring harness |
| B150 | Positive connection 2 (30a), in interior wiring harness |
| B340 | Connection 1 (58d), in main wiring harness |
| * | According to equipment |
| *2 | If fitted |
| *3 | From July 2012 |
| *4 | Cross section depends on equipment |
| *5 | Up to June 2012 |
| *6 | Wiring colour depends on equipment |
| J519 | Onboard supply control unit |
| L46 | Rear left fog light bulb |
| M2 | Right tail light bulb |
| MX3 | Left tail light |
| M4 | Left tail light bulb |
| MX5 | Left tail light 2 |
| M6 | Rear left turn signal bulb |
| MX6 | Right tail light 2 |
| M9 | Left brake light bulb |
| M16 | Left reversing light bulb |
| M17 | Right reversing light bulb |
| T4a | 4-pin connector |
| T4c | 4-pin connector |
| T4d | 4-pin connector |
| T52a | 52-pin connector |
| T52c | 52-pin connector |
| 86 | Earth connection 1, in rear wiring harness |
| A6 | Positive connection (left turn signal), in dash panel wiring harness |
| A84 | Connection (58L), in dash panel wiring harness |
| A87 | Connection (RL), in dash panel wiring harness |
| E234 | Rear lid handle release button |
| F256 | Rear lid lock unit |
| J519 | Onboard supply control unit |
| T2dx | 2-pin connector |
| T2dy | 2-pin connector |
| T2t | 2-pin connector |
| T4u | 4-pin connector |
| T52a | 52-pin connector |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| V53 | Rear lid central locking motor |
| X | Number plate light |
| 86 | Earth connection 1, in rear wiring harness |
| 437 | Earth connection, in number plate wiring harness |
| 662 | Earth point, rear left side panel |
| B128 | Connection (luggage compartment light), in interior wiring harness |
| W41 | Positive connection (58), in number plate lights wiring harness |
| * | Cross section depends on equipment |
| *2 | According to equipment |
| F | Brake light switch |
| J519 | Onboard supply control unit |
| M2 | Right tail light bulb |
| MX4 | Right tail light |
| M8 | Rear right turn signal bulb |
| M10 | Right brake light bulb |
| M25 | Additional brake light bulb |
| T2bv | 2-pin connector |
| T2dn | 2-pin connector |
| T4al | 4-pin connector |
| T4b | 4-pin connector |
| T52a | 52-pin connector |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| V5 | Washer pump |
| 87 | Earth connection 2, in rear wiring harness |
| 682 | Earth point 2, in rear right side panel |
| A5 | Positive connection (right turn signal), in dash panel wiring harness |
| A85 | Connection (58R), in dash panel wiring harness |
| A201 | Positive connection 6 (15a) in dash panel wiring harness |
| B131 | Connection (54), in interior wiring harness |
| D196 | Connection 2 (87a) in engine prewiring harness |
| * | According to equipment |
| F4 | Reversing light switch |
| J386 | Driver door control unit |
| J387 | Front passenger door control unit |
| J519 | Onboard supply control unit |
| L131 | Driver side turn signal repeater bulb |
| L132 | Front passenger side turn signal repeater bulb |
| T2fi | 2-pin connector |
| T2sl | 2-pin connector, in driver side exterior mirror housing |
| T2sr | 2-pin connector |
| T2x | 2-pin connector |
| T16a | 16-pin connector |
| T16d | 16-pin connector |
| T20a | 20-pin connector |
| T20b | 20-pin connector |
| T28 | 28-pin connector |
| T28a | 28-pin connector, near lower part of right A-pillar |
| T52a | 52-pin connector |
| T52b | 52-pin connector |
| V155 | Tank filler flap locking motor |
| 107 | Earth connection, in external mirror wiring harness |
| 801 | Earth connection 2, in external mirror wiring harness |
| B182 | Connection (RL), in interior wiring harness |
| * | According to equipment |
| *2 | Only models with no US equipment |
| EX20 | Right steering column switch |
| E22 | Intermittent wiper switch |
| E38 | Intermittent wiper regulator |
| E44 | Washer pump switch (automatic wash/wipe and headlight washer system) |
| F189 | Tiptronic switch |
| J519 | Onboard supply control unit |
| J527 | Steering column electronics control unit |
| J623 | Engine control unit |
| T10s | 10-pin connector |
| T16l | 16-pin connector |
| B114 | Connection (inhibitor switch), in interior wiring harness |
| B441 | Connection (CCS), in main wiring harness |
| D | Ignition/starter switch |
| E2 | Turn signal switch |
| E4 | Headlight dipper and flasher switch |
| EX19 | Left steering column switch |
| E45 | Cruise control system switch |
| E227 | Cruise control system (CCS) SET button |
| J519 | Onboard supply control unit |
| J527 | Steering column electronics control unit |
| N376 | Ignition key withdrawal lock solenoid |
| T12j | 12-pin connector |
| * | Only models with cruise control system (CCS) |
| *2 | Only models with dual clutch gearbox (DSG) |
| *3 | Wiring colour depends on equipment |
| *4 | Cross section depends on equipment |
| *5 | According to equipment |
| *6 | Up to May 2013 |
| F138 | Airbag coil connector and return ring with slip ring |
| H | Horn plate |
| J234 | Airbag control unit |
| J453 | Multifunction steering wheel control unit |
| J519 | Onboard supply control unit |
| J527 | Steering column electronics control unit |
| T4k | 4-pin connector |
| T12k | 12-pin connector |
| T52a | 52-pin connector |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| T75 | 75-pin connector |
| 44 | Earth point, lower part of left A-pillar |
| 367 | Earth connection 2, in main wiring harness |
| 605 | Earth point, on top end of steering column |
| * | see applicable current flow diagram for airbag |
| *2 | see applicable current flow diagram for multifunction steering wheel |
| *3 | Wiring colour depends on equipment |
| *4 | Cross section depends on equipment |
| E26 | Glove compartment light switch |
| F266 | Bonnet contact switch |
| G397 | Rain and light sensor |
| J519 | Onboard supply control unit |
| T2bp | 2-pin connector |
| T2br | 2-pin connector |
| T2bt | 2-pin connector |
| T2bu | 2-pin connector |
| T2n | 2-pin connector, near headlight |
| T3ae | 3-pin connector |
| T4p | 4-pin connector |
| T52a | 52-pin connector |
| T52b | 52-pin connector |
| V | Windscreen wiper motor |
| W6 | Glove compartment light |
| Z20 | Left washer jet heater element |
| Z21 | Right washer jet heater element |
| 80 | Earth connection 1, in dash panel wiring harness |
| 124 | Earth connection, in right side engine compartment wiring harness |
| A184 | Connection (bonnet contact switch), in dash panel wiring harness |
| C53 | Positive connection (x), in heated washer jets wiring harness |
| * | Up to May 2013 |
| H1 | Horn or dual tone horn |
| J4 | Dual tone horn relay |
| J9 | Heated rear window relay |
| J519 | Onboard supply control unit |
| R178 | Frequency modulation (FM) frequency filter in negative wire |
| R179 | Frequency modulation (FM) frequency filter in positive wire |
| T2di | 2-pin connector |
| T2dj | 2-pin connector |
| T5c | 5-pin connector |
| T5f | 5-pin connector |
| T52b | 52-pin connector |
| Z1 | Heated rear window |
| 13 | Earth point, on right in engine compartment |
| 124 | Earth connection, in right side engine compartment wiring harness |
| 681 | Earth point 1, in rear right side panel |
| A198 | Positive connection 6 (30a) in dash panel wiring harness |
| B180 | Connection (heated rear window), in interior wiring harness |
| C13 | Positive connection in dual tone horn wiring harness |
| * | Only models with dual tone horn |
| *2 | Only models with multifunction steering wheel |
| *3 | Only models with dual clutch gearbox (DSG) |
| J519 | Onboard supply control unit |
| T2aq | 2-pin connector |
| T6b | 6-pin connector |
| T6d | 6-pin connector |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| W1 | Front interior light |
| W3 | Luggage compartment light |
| W39 | Left centre reading light |
| W40 | Right centre reading light |
| Y7 | Automatic anti-dazzle interior mirror |
| 347 | Earth connection, in roof wiring harness |
| B154 | Connection 1 (DCt), in interior wiring harness |
| B250 | Positive connection, in roof wiring harness |
| B552 | Positive connection 2, in roof wiring harness |
| * | Up to May 2013 |
| *2 | From June 2013 |
| E229 | Hazard warning lights button |
| F147 | Driver vanity mirror contact switch |
| F148 | Front passenger vanity mirror contact switch |
| J519 | Onboard supply control unit |
| K6 | Indicator lamp for hazard warning light |
| T2bi | 2-pin connector |
| T2bj | 2-pin connector |
| T2bk | 2-pin connector |
| T2bl | 2-pin connector |
| T3an | 3-pin connector |
| T6c | 6-pin connector |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| W11 | Rear left reading light |
| W12 | Rear right reading light |
| W14 | Front passenger side illuminated vanity mirror |
| W20 | Driver side illuminated vanity mirror |
| W43 | Rear interior light |
| 43 | Earth point, lower part of right A-pillar |
| 81 | Earth connection 1, in dash panel wiring harness |
| 347 | Earth connection, in roof wiring harness |
| 366 | Earth connection 1, in main wiring harness |
| B250 | Positive connection, in roof wiring harness |
| B552 | Positive connection 2, in roof wiring harness |
| * | According to equipment |
| *2 | Cross section depends on equipment |
| J29 | Blocking diode, in interior wiring harness |
| J519 | Onboard supply control unit |
| L28 | Cigarette lighter illumination bulb |
| T3g | 3-pin connector |
| T3h | 3-pin connector |
| T3j | 3-pin connector |
| T3wr | 3-pin connector |
| T52c | 52-pin connector |
| U1 | Cigarette lighter |
| U5 | 12 V socket |
| U13 | DC/AC converter with socket, 12 V - 230 V |
| U18 | 12 V socket 2 |
| 43 | Earth point, lower part of right A-pillar |
| 374 | Earth connection 9, in main wiring harness |
| 602 | Earth point, in front left footwell |
| B177 | Connection (61), in interior wiring harness |
| B348 | Connection 1 (75a), in main wiring harness |
| * | Wiring colour depends on equipment |
| *2 | Cross section depends on equipment |
| *3 | Only models with dual tone horn |
| *4 | Up to May 2013 |
| *5 | According to equipment |
| *6 | From June 2013 |
| E9 | Fresh air blower switch |
| E16 | Heater/heat output switch |
| E230 | Heated rear window button |
| G143 | Potentiometer for air recirculation flap control motor |
| J162 | Heater control unit |
| J485 | Auxiliary heater operation relay |
| J519 | Onboard supply control unit |
| K10 | Heated rear window warning lamp |
| K114 | Fresh air and air recirculation warning lamp |
| L16 | Fresh air regulator illumination bulb |
| N24 | Fresh air blower series resistor with overheating fuse |
| T2v | 2-pin connector |
| T4f | 4-pin connector |
| T5 | 5-pin connector |
| T6s | 6-pin connector |
| T9y | 9-pin connector |
| T10a | 10-pin connector |
| T10ag | 10-pin connector |
| T10n | 10-pin connector |
| T20c | 20-pin connector |
| T52a | 52-pin connector |
| T52b | 52-pin connector |
| V2 | Fresh air blower |
| V154 | Fresh air and air recirculation flap control motor |
| 602 | Earth point, in front left footwell |
| L77 | Connection, in fresh air blower wiring harness |
| L78 | Connection 1, in fresh air blower wiring harness |
| * | Cross section depends on equipment |
| D2 | Immobiliser reader coil |
| F9 | Handbrake warning switch |
| F34 | Brake fluid level warning contact |
| J285 | Control unit in dash panel insert |
| J362 | Immobiliser control unit |
| J519 | Onboard supply control unit |
| K | Dash panel insert |
| K75 | Airbag warning lamp |
| K132 | Electronic power control fault lamp |
| K155 | ESP and TCS warning lamp |
| K169 | Selector lever lock warning lamp |
| T2ap | 2-pin connector |
| T2bm | 2-pin connector |
| T2w | 2-pin connector |
| T32 | 32-pin connector |
| 132 | Earth connection 3, in engine compartment wiring harness |
| A199 | Positive connection 4 (15a) in dash panel wiring harness |
| * | Cross section depends on equipment |
| G1 | Fuel gauge |
| G6 | Fuel system pressurisation pump |
| G34 | Front left brake pad wear sender |
| J285 | Control unit in dash panel insert |
| J519 | Onboard supply control unit |
| J538 | Fuel pump control unit |
| K | Dash panel insert |
| K2 | Alternator warning lamp |
| K47 | ABS warning lamp |
| K149 | Engine electronics warning lamp |
| T2bb | 2-pin connector |
| T5b | 5-pin connector |
| T10a | 10-pin connector |
| T10n | 10-pin connector |
| T32 | 32-pin connector |
| 389 | Earth connection 24, in main wiring harness |
| B379 | Connection 1 (brake pad wear indicator), in main wiring harness |
| B380 | Connection 2 (brake pad wear indicator), in main wiring harness |
| * | According to equipment |
| *2 | see applicable current flow diagram for engine |
| *3 | Only models with auxiliary coolant heater |
| *4 | Only models with no start/stop system |
| *5 | Only models with start/stop system |
| F1 | Oil pressure switch |
| G17 | Ambient temperature sensor |
| G32 | Coolant shortage indicator sender |
| G33 | Windscreen washer fluid level sender |
| J285 | Control unit in dash panel insert |
| J519 | Onboard supply control unit |
| K | Dash panel insert |
| K31 | Cruise control system warning lamp |
| K65 | Left turn signal warning lamp |
| K94 | Right turn signal warning lamp |
| K161 | Electromechanical power steering warning lamp |
| T2bw | 2-pin connector |
| T2cw | 2-pin connector |
| T2dk | 2-pin connector |
| T14 | 14-pin connector |
| T32 | 32-pin connector |
| 269 | Earth connection (sender earth) 1, in dash panel wiring harness |
| * | According to equipment |
| *2 | Only models with auxiliary coolant heater |
| *3 | Cross section depends on equipment |
| *4 | Only models with start/stop system |
| J285 | Control unit in dash panel insert |
| J519 | Onboard supply control unit |
| J533 | Data bus diagnostic interface |
| K | Dash panel insert |
| K1 | Main beam warning lamp |
| K83 | Exhaust emissions warning lamp |
| K166 | Door open warning lamp |
| K170 | Bulb failure warning lamp |
| K171 | Bonnet open warning lamp |
| K201 | Fuel tank flap lock warning lamp |
| K205 | Warning lamp for daytime running lights |
| K220 | Tyre Pressure Loss Indicator warning lamp |
| T20 | 20-pin connector |
| T32 | 32-pin connector |
| B708 | Connection 1 (dash panel insert CAN bus high) in main wiring harness |
| B709 | Connection 1 (dash panel insert CAN bus low) in main wiring harness |
| * | From June 2013 |
| *2 | According to equipment |
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