| A | Battery |
| A19 | Voltage converter |
| F148 | Front passenger vanity mirror contact switch |
| JX1 | Power and control electronics for electric drive |
| J245 | Sliding sunroof adjustment control unit |
| J367 | Battery monitor control unit |
| T2bl | 2-pin connector |
| T2v | 2-pin connector |
| T3wr | 3-pin connector |
| T10a | 10-pin connector, behind glove compartment |
| T10e | 10-pin connector, near front interior light |
| T28a | 28-pin connector, lower part of A-pillar, front passenger side |
| U13 | DC/AC converter with socket, 12 V - 230 V |
| U27 | DC/AC converter with socket, 12 V - 115 V |
| V2 | Fresh air blower |
| Z35 | Auxiliary air heater element |
| 1 | Earth strap, battery - body |
| 81 | Earth connection 1, in dash panel wiring harness |
| 206 | Earth connection, in front passenger door wiring harness |
| 602 | Earth point, in front left footwell |
| 624 | Earth point, starter battery |
| * | Not for American markets |
| *2 | Only for American markets |
| *3 | Only models with hybrid drive system |
| E107 | Window regulator switch in front passenger door |
| E309 | Front passenger side interior locking button for central locking system |
| F221 | Front passenger side central locking lock unit |
| F223 | Rear right central locking lock unit |
| J387 | Front passenger door control unit |
| J389 | Rear right door control unit |
| L132 | Front passenger side turn signal repeater bulb |
| T4ak | 4-pin connector |
| T4an | 4-pin connector |
| T8h | 8-pin connector |
| T8t | 8-pin connector |
| T12c | 12-pin connector, in front passenger door |
| T16b | 16-pin connector |
| T18c | 18-pin connector |
| T20b | 20-pin connector |
| T28c | 28-pin connector, lower part of B-pillar, front passenger side |
| T32b | 32-pin connector |
| Z5 | Heated exterior mirror on front passenger side |
| 81 | Earth connection 1, in dash panel wiring harness |
| 206 | Earth connection, in front passenger door wiring harness |
| 208 | Earth connection, in rear right door wiring harness |
| 801 | Earth connection 2, in external mirror wiring harness, in left door, near exterior mirror |
| * | Only models with "Low" equipment (AW0) |
| *2 | Only models with "High" equipment (AW1) |
| E54 | Rear right window regulator switch, in door |
| T4ar | 4-pin connector |
| T10d | 10-pin connector, under front passenger seat |
| 43 | Earth point, lower part of right A-pillar |
| 81 | Earth connection 1, in dash panel wiring harness |
| 145 | Earth connection 3, in seat heating wiring harness |
| 208 | Earth connection, in rear right door wiring harness |
| 366 | Earth connection 1, in main wiring harness |
| 374 | Earth connection 9, in main wiring harness |
| 379 | Earth connection 14, in main wiring harness |
| E508 | Operating unit for preparation for mobile telephone |
| J29 | Blocking diode, in interior wiring harness |
| R36 | Telephone transmitter and receiver unit |
| R126 | Telephone bracket |
| T3g | 3-pin connector |
| T3h | 3-pin connector |
| T3j | 3-pin connector |
| T6av | 6-pin connector |
| T10m | 10-pin connector |
| T54 | 54-pin connector |
| U1 | Cigarette lighter |
| U5 | 12 V socket |
| U18 | 12 V socket 2 |
| 145 | Earth connection 3, in seat heating wiring harness |
| 366 | Earth connection 1, in main wiring harness |
| 374 | Earth connection 9, in main wiring harness |
| 379 | Earth connection 14, in main wiring harness |
| E229 | Hazard warning lights button |
| G60 | Front passenger seat temperature sensor |
| J532 | Voltage stabiliser |
| K6 | Indicator lamp for hazard warning light |
| T2e | 2-pin connector, in seat |
| T4m | 4-pin connector, in seat |
| T6c | 6-pin connector |
| T10w | 10-pin connector |
| T12d | 12-pin connector |
| Z8 | Heated seat cushion for front passenger seat |
| Z9 | Heated backrest for front passenger seat |
| Z33 | Front passenger seat lateral support heater |
| 145 | Earth connection 3, in seat heating wiring harness |
| 318 | Earth connection 4, in seat heating wiring harness |
| 366 | Earth connection 1, in main wiring harness |
| * | Gradually discontinued |
| *2 | gradual introduction |
| G238 | Air quality sensor |
| J533 | Data bus diagnostic interface |
| J745 | Control unit for cornering light and headlight range control |
| MX1 | Front left headlight |
| MX2 | Front right headlight |
| T2br | 2-pin connector |
| T2bt | 2-pin connector |
| T2bu | 2-pin connector |
| T3aw | 3-pin connector |
| T10l | 10-pin connector |
| T10r | 10-pin connector |
| T14l | 14-pin connector |
| T14r | 14-pin connector |
| T16b | 16-pin connector |
| T20a | 20-pin connector |
| T26b | 26-pin connector |
| U31 | Diagnostic connection, near lower part of left A-pillar |
| V48 | Left headlight range control motor |
| V49 | Right headlight range control 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 |
| 366 | Earth connection 1, in main wiring harness |
| * | Diagnostic connection |
| *2 | Headlight with gas discharge light |
| *3 | From June 2013 |
| E1 | Light switch |
| E2 | Turn signal switch |
| E266 | Parking aid button |
| F9 | Handbrake warning switch |
| F319 | Selector lever locked in position P switch |
| J301 | Air conditioning system control unit |
| L9 | Light switch illumination bulb |
| L76 | Button illumination bulb |
| T2w | 2-pin connector |
| T3i | 3-pin connector |
| T6j | 6-pin connector |
| T10s | 10-pin connector |
| T16ls | 16-pin connector |
| T17 | 17-pin connector |
| T20c | 20-pin connector |
| 366 | Earth connection 1, in main wiring harness |
| 387 | Earth connection 22, in main wiring harness |
| 388 | Earth connection 23, in main wiring harness |
| * | Not for models with dual clutch gearbox |
| *2 | Only models with "Low" equipment (AW0) |
| E1 | Light switch |
| E20 | Switch and instrument illumination regulator |
| E102 | Headlight range control regulator |
| E132 | Traction control system switch |
| E262 | Start/Stop operation switch |
| E286 | Rear central switch for interior locking |
| E319 | Fuel tank flap release button |
| E492 | Tyre Pressure Loss Indicator button |
| F319 | Selector lever locked in position P switch |
| J255 | Climatronic control unit |
| J518 | Entry and start authorisation control unit |
| L105 | Illumination regulator illumination bulb |
| T3i | 3-pin connector |
| T4bz | 4-pin connector |
| T6ad | 6-pin connector |
| T6ak | 6-pin connector |
| T6be | 6-pin connector |
| T6te | 6-pin connector |
| T8e | 8-pin connector |
| T10h | 10-pin connector |
| T10s | 10-pin connector |
| T20c | 20-pin connector |
| T32e | 32-pin connector |
| 388 | Earth connection 23, in main wiring harness |
| * | Only models with "High" equipment (AW1) |
| *2 | According to equipment |
| *3 | Only models with start/stop system |
| *4 | Only models with "Low" equipment (AW0) |
| *5 | Only models with hybrid drive system |
| H1 | Horn or dual tone horn |
| J104 | ABS control unit |
| L23 | Right fog light bulb |
| MX2 | Front right headlight |
| T2bt | 2-pin connector |
| T2bu | 2-pin connector |
| T2by | 2-pin connector |
| T2dh | 2-pin connector |
| T2dj | 2-pin connector |
| T10r | 10-pin connector |
| T26b | 26-pin connector |
| T47 | 47-pin connector |
| V11 | Headlight washer system pump |
| V263 | Fuel pump for cold start |
| Z20 | Left washer jet heater element |
| Z21 | Right washer jet heater element |
| 13 | Earth point, on right in engine compartment |
| 121 | Earth connection 2, in front right wiring harness |
| 124 | Earth connection, in right side engine compartment wiring harness |
| 638 | Earth point, on right A-pillar |
| * | Only models with dual tone horn |
| *2 | Up to May 2013 |
| *3 | see applicable current flow diagram for engine |
| J400 | Wiper motor control unit |
| L22 | Left fog light bulb |
| MX1 | Front left headlight |
| T2dg | 2-pin connector |
| T4p | 4-pin connector |
| T10l | 10-pin connector |
| 85 | Earth connection 1, in engine compartment wiring harness |
| 114 | Earth connection, in automatic gearbox wiring harness |
| 131 | Earth connection 2, in engine compartment wiring harness |
| 179 | Earth connection, in left headlight wiring harness |
| 376 | Earth connection 11, in main wiring harness |
| 655 | Earth point, on left headlight |
| F34 | Brake fluid level warning contact |
| F266 | Bonnet contact switch |
| G266 | Oil level and oil temperature sender |
| J179 | Automatic glow period control unit |
| J623 | Engine control unit |
| J842 | Control unit for air conditioning compressor |
| N280 | Air conditioner compressor regulating valve |
| T2ap | 2-pin connector |
| T2m | 2-pin connector |
| T2n | 2-pin connector, on left in engine compartment near headlight |
| T4t | 4-pin connector, near starter |
| T6z | 6-pin connector, near E-box |
| T8ay | 8-pin connector |
| T11a | 11-pin connector |
| T14ax | 14-pin connector |
| T14hy | 14-pin connector, black |
| T80 | 80-pin connector |
| T91 | 91-pin connector |
| T94 | 94-pin connector |
| 85 | Earth connection 1, in engine compartment wiring harness |
| 114 | Earth connection, in automatic gearbox wiring harness |
| 131 | Earth connection 2, in engine compartment wiring harness |
| 132 | Earth connection 3, in engine compartment wiring harness |
| 167 | Earth connection 4, in engine compartment wiring harness |
| * | see applicable current flow diagram for engine |
| *2 | Only models with hybrid drive system |
| F125 | Multifunction switch |
| G476 | Clutch position sender |
| J217 | Automatic gearbox control unit |
| J318 | Vacuum pump relay |
| J743 | Mechatronic unit for dual clutch gearbox |
| N79 | Heater element for crankcase breather |
| T5m | 5-pin connector |
| T10o | 10-pin connector |
| T20e | 20-pin connector |
| T25 | 25-pin connector |
| T52 | 52-pin connector |
| V192 | Vacuum pump for brakes |
| 85 | Earth connection 1, in engine compartment wiring harness |
| 114 | Earth connection, in automatic gearbox wiring harness |
| 131 | Earth connection 2, in engine compartment wiring harness |
| * | Only models with 1.6l engine |
| *2 | Only models with diesel engine |
| *3 | According to equipment |
| E40 | Front left window regulator switch |
| E43 | Mirror adjustment switch |
| E233 | Rear lid remote release button |
| E308 | Driver side interior locking button for central locking system |
| E319 | Fuel tank flap release button |
| F220 | Driver side central locking lock unit |
| J386 | Driver door control unit |
| K174 | Driver side interior locking warning lamp |
| T2z | 2-pin connector |
| T4ac | 4-pin connector |
| T4am | 4-pin connector |
| T4w | 4-pin connector |
| T8f | 8-pin connector |
| T10f | 10-pin connector |
| T16a | 16-pin connector |
| T28 | 28-pin connector, on lower section of left A-pillar |
| T32a | 32-pin connector |
| T32f | 32-pin connector, on lower section of left A-pillar |
| 205 | Earth connection, in driver door wiring harness |
| 386 | Earth connection 21, in main wiring harness |
| * | Only models with "Low" equipment (AW0) |
| *2 | Only models with "High" equipment (AW1) |
| *3 | Only for American markets |
| J386 | Driver door control unit |
| L131 | Driver side turn signal repeater bulb |
| T10c | 10-pin connector, under seat on front left |
| T12b | 12-pin connector, in driver door |
| T20a | 20-pin connector |
| Z4 | Heated exterior mirror on driver side |
| 44 | Earth point, lower part of left A-pillar |
| 96 | Earth connection 1, in seat heating wiring harness |
| 107 | Earth connection, in external mirror wiring harness, in left door, near exterior mirror |
| 205 | Earth connection, in driver door wiring harness |
| 367 | Earth connection 2, in main wiring harness |
| 386 | Earth connection 21, in main wiring harness |
| 605 | Earth point, on top end of steering column |
| * | Only models with "Low" equipment (AW0) |
| *2 | Only models with "High" equipment (AW1) |
| E52 | Rear left window regulator switch, in door |
| E418 | Seat longitudinal adjustment button |
| E421 | Rake adjustment button |
| E425 | Backrest adjustment button |
| F222 | Rear left central locking lock unit |
| J388 | Rear left door control unit |
| T4aq | 4-pin connector |
| T6g | 6-pin connector |
| T8s | 8-pin connector |
| T16h | 16-pin connector |
| T28b | 28-pin connector, on left B-pillar |
| 95 | Earth connection 1, in seat adjustment wiring harness |
| 96 | Earth connection 1, in seat heating wiring harness |
| 207 | Earth connection, in rear left door wiring harness |
| 367 | Earth connection 2, in main wiring harness |
| 386 | Earth connection 21, in main wiring harness |
| * | Only models with "Low" equipment (AW0) |
| *2 | Only models with "High" equipment (AW1) |
| E176 | Driver seat lumbar support adjustment switch |
| G59 | Driver seat temperature sensor |
| J774 | Heated front seats control unit |
| T2d | 2-pin connector, in driver seat |
| T4l | 4-pin connector, in driver seat |
| T6ah | 6-pin connector |
| T8z | 8-pin connector |
| Z6 | Heated seat cushion for driver seat |
| Z7 | Heated backrest for driver seat |
| Z31 | Driver seat cushion lateral support heater |
| 96 | Earth connection 1, in seat heating wiring harness |
| 136 | Earth connection 2, in seat heating wiring harness |
| 367 | Earth connection 2, in main wiring harness |
| * | Gradually discontinued |
| EX20 | Right steering column switch |
| J285 | Control unit in dash panel insert |
| J329 | Terminal 15 voltage supply relay |
| J519 | Onboard supply control unit |
| J527 | Steering column electronics control unit |
| J680 | Terminal 75 voltage supply relay 1 |
| J935 | Converter box |
| T9x | 9-pin connector |
| T10i | 10-pin connector |
| T10ls | 10-pin connector |
| T16l | 16-pin connector |
| T32b | 32-pin connector |
| T52a | 52-pin connector |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| T73a | 73-pin connector |
| T73b | 73-pin connector |
| 367 | Earth connection 2, in main wiring harness |
| * | Only models with "High" equipment (AW1) |
| *2 | Only models with "Low" equipment (AW0) |
| *3 | Cross section depends on equipment |
| F138 | Airbag coil connector and return ring with slip ring |
| G476 | Clutch position sender |
| J162 | Heater control unit |
| J331 | Dipped beam relay |
| J519 | Onboard supply control unit |
| J681 | Terminal 15 voltage supply relay 2 |
| T5m | 5-pin connector |
| T9h | 9-pin connector |
| T16k | 16-pin connector |
| T20c | 20-pin connector |
| T52c | 52-pin connector |
| T73a | 73-pin connector |
| 367 | Earth connection 2, in main wiring harness |
| 368 | Earth connection 3, in main wiring harness |
| 389 | Earth connection 24, in main wiring harness |
| * | According to equipment |
| *2 | Gradually discontinued |
| *3 | Only models with "Low" equipment (AW0) |
| *4 | Only models with "High" equipment (AW1) |
| E378 | Starter button |
| E656 | Button for electric drive |
| F47 | Brake pedal switch |
| G34 | Front left brake pad wear sender |
| G65 | High-pressure sender |
| H12 | Alarm horn |
| H18 | Alarm system horn |
| J13 | Fresh air blower relay |
| J485 | Auxiliary heater operation relay |
| J641 | Alarm horn relay |
| J682 | Terminal 50 voltage supply relay |
| J764 | Control unit for electronic steering column lock |
| J869 | Control unit for structure-borne sound |
| L76 | Button illumination bulb |
| T2ah | 2-pin connector |
| T2bb | 2-pin connector |
| T3c | 3-pin connector |
| T3f | 3-pin connector |
| T4al | 4-pin connector |
| T5ah | 5-pin connector |
| T6ef | 6-pin connector |
| T6st | 6-pin connector |
| T16v | 16-pin connector |
| 389 | Earth connection 24, in main wiring harness |
| B380 | Connection 2 (brake pad wear indicator), in main wiring harness |
| * | Only models with hybrid drive system |
| *2 | Cross section depends on equipment |
| H1 | Horn or dual tone horn |
| JX1 | Power and control electronics for electric drive |
| J369 | Wiper motor switch-over relay 2, in E-box in engine compartment |
| N79 | Heater element for crankcase breather |
| T2cf | 2-pin connector |
| T2di | 2-pin connector |
| T2fc | 2-pin connector |
| T2fl | 2-pin connector |
| T4x | 4-pin connector, near radiator fan |
| V7 | Radiator fan |
| V35 | Right radiator fan |
| V51 | Continued coolant circulation pump |
| V101 | Secondary air pump motor |
| V177 | Radiator fan 2 |
| V277 | Fuel pump 2 |
| 12 | Earth point, on left in engine compartment |
| 108 | Earth connection 2, in front left wiring harness |
| * | see applicable current flow diagram for engine |
| *2 | Only models with "High" equipment (AW1) |
| *3 | Only models with dual tone horn |
| *4 | Only models with two radiator fans |
| *5 | Only models with hybrid drive system |
| F1 | Oil pressure switch |
| N70 | Ignition coil 1 with output stage |
| N127 | Ignition coil 2 with output stage |
| N291 | Ignition coil 3 with output stage |
| N323 | Ignition coil 5 with output stage |
| N492 | Solenoid for coolant circuit |
| T3bc | 3-pin connector |
| T3ht | 3-pin connector |
| T3nt | 3-pin connector |
| T14l | 14-pin connector |
| V178 | Coolant circulation pump 2 |
| V192 | Vacuum pump for brakes |
| V467 | Coolant pump for high-temperature circuit |
| V468 | Coolant pump for low-temperature circuit |
| 85 | Earth connection 1, in engine compartment wiring harness |
| 108 | Earth connection 2, in front left wiring harness |
| * | Only models with 1.6l engine |
| *2 | Only models with diesel engine |
| *3 | Only models with hybrid drive system |
| AX1 | Hybrid battery unit |
| G197 | Magnetic field sender for compass |
| J345 | Trailer detector control unit |
| J840 | Battery regulation control unit |
| T4cx | 4-pin connector |
| T4lh | 4-pin connector |
| T6au | 6-pin connector |
| T12a | 12-pin connector |
| T13 | 13-pin connector |
| T14ax | 14-pin connector |
| U10 | Trailer socket |
| V457 | Battery fan 1 |
| 86 | Earth connection 1, in rear wiring harness |
| 430 | Earth connection, in towing bracket wiring harness |
| 431 | Earth connection 2, in roof wiring harness |
| 662 | Earth point, rear left side panel |
| 701 | Earth point in luggage compartment |
| 816 | Earth connection 1, in hybrid system wiring harness |
| * | Only models with hybrid drive system |
| E234 | Rear lid handle release button |
| F5 | Luggage compartment light switch |
| F256 | Rear lid lock unit |
| J500 | Power steering control unit |
| J895 | Control unit for vehicle location system |
| MX3 | Left tail light |
| MX5 | Left tail light 2 |
| MX6 | Right tail light 2 |
| R149 | Remote control receiver for auxiliary coolant heater |
| T2a | 2-pin connector |
| T2t | 2-pin connector |
| T3an | 3-pin connector |
| T4u | 4-pin connector |
| T6j | 6-pin connector |
| V254 | Rear lid electric opener motor |
| W44 | Rear centre reading light |
| X | Number plate light |
| 86 | Earth connection 1, in rear wiring harness |
| 437 | Earth connection, in number plate wiring harness |
| 640 | Earth point 2, left in engine compartment |
| F334 | Fuel tank cap detection switch |
| G6 | Fuel system pressurisation pump |
| J446 | Parking aid control unit |
| J538 | Fuel pump control unit |
| MX4 | Right tail light |
| M25 | Additional brake light bulb |
| R178 | Frequency modulation (FM) frequency filter in negative wire |
| T2dn | 2-pin connector |
| T4b | 4-pin connector |
| T4te | 4-pin connector |
| T5b | 5-pin connector |
| T10n | 10-pin connector |
| T16c | 16-pin connector |
| V54 | Metering pump |
| Z1 | Heated rear window |
| 87 | Earth connection 2, in rear wiring harness |
| 196 | Earth connection 3, in rear wiring harness |
| 681 | Earth point 1, in rear right side panel |
| 682 | Earth point 2, in rear right side panel |
| * | Only models with auxiliary coolant heater |
| *2 | If fitted |
| *3 | Only models with hybrid drive system |
| *4 | Cross-section 1.5 possible |
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