| A | Battery |
| CX1 | Alternator with voltage regulator |
| J367 | Battery monitor control unit |
| J519 | Onboard supply control unit |
| J533 | Data bus diagnostic interface |
| J623 | Engine control unit |
| SA1 | Fuse 1 in fuse holder A |
| T2bn | 2-pin connector |
| T2gc | 2-pin connector |
| T4a | 4-pin connector, near starter |
| T20e | 20-pin connector |
| T52c | 52-pin connector |
| T94 | 94-pin connector |
| 12 | Earth point, on left in engine compartment |
| 508 | Threaded connection (30) on E-box |
| B321 | Positive connection 7 (30a) in main wiring harness |
| B344 | Connection 1 (61), in main wiring harness |
| B689 | Positive connection 29 (30a) in main wiring harness |
| * | Only models with stop/start system |
| *2 | Only models with dual clutch gearbox 0AM |
| *3 | Only models with dual clutch gearbox 02E |
| *4 | Only models with 1.4l engine |
| F | Brake light switch |
| J151 | Continued coolant circulation relay |
| N70 | Ignition coil 1 with output stage |
| N127 | Ignition coil 2 with output stage |
| N276 | Fuel pressure regulating valve |
| N291 | Ignition coil 3 with output stage |
| N292 | Ignition coil 4 with output stage |
| SB10 | Fuse 10 on fuse holder B |
| SB16 | Fuse 16 on fuse holder B |
| SB20 | Fuse 20 on fuse holder B |
| SB24 | Fuse 24 on fuse holder B |
| T4f | 4-pin connector |
| T4no | 4-pin connector |
| T6w | 6-pin connector |
| T14a | 14-pin connector, on left in engine compartment |
| T40 | 40-pin connector |
| Z19 | Lambda probe heater |
| Z29 | Lambda probe 1 heater after catalytic converter |
| D181 | Connection 2 (87a) in engine compartment wiring harness |
| D182 | Connection 3 (87a) in engine compartment wiring harness |
| D189 | Connection (87a) in engine prewiring harness |
| * | see applicable current flow diagram for engine |
| *2 | Only models with 1.4l engine |
| J496 | Additional coolant pump relay |
| J757 | Engine component current supply relay |
| N75 | Charge pressure control solenoid valve |
| N80 | Activated charcoal filter solenoid valve 1 |
| N205 | Camshaft control valve 1 |
| N249 | Turbocharger air recirculation valve |
| N276 | Fuel pressure regulating valve |
| N316 | Intake manifold flap valve |
| N428 | Valve for oil pressure control |
| SB17 | Fuse 17 on fuse holder B |
| SB18 | Fuse 18 on fuse holder B |
| SB23 | Fuse 23 on fuse holder B |
| T14a | 14-pin connector |
| T40 | 40-pin connector |
| V50 | Coolant circulation pump |
| B362 | Positive connection 13 (87a) in main wiring harness |
| D180 | Connection (87a), in engine compartment wiring harness |
| * | Only models with 1.4l engine |
| *2 | see applicable current flow diagram for engine |
| *3 | According to equipment |
| J285 | Control unit in dash panel insert |
| J412 | Mobile telephone operating electronics control unit |
| J532 | Voltage stabiliser |
| J533 | Data bus diagnostic interface |
| R12 | Amplifier |
| SB7 | Fuse 7 on fuse holder B |
| SB11 | Fuse 11 on fuse holder B |
| SB12 | Fuse 12 on fuse holder B |
| SB15 | Fuse 15 on fuse holder B |
| SB19 | Fuse 19 on fuse holder B |
| T12ac | 12-pin connector |
| T20e | 20-pin connector |
| T23 | 23-pin connector |
| T32c | 32-pin connector |
| T40 | 40-pin connector |
| T54 | 54-pin connector |
| B150 | Positive connection 2 (30a), in interior wiring harness |
| B219 | Positive connection 4 (30a), in interior wiring harness |
| B322 | Positive connection 8 (30a) in main wiring harness |
| * | Only models with 12-channel sound system |
| *2 | Only models with preparation for mobile telephone |
| *3 | According to equipment |
| *4 | Only models with no start/stop system |
| *5 | Only models with stop/start system |
| E1 | Light switch |
| J104 | ABS control unit |
| J329 | Terminal 15 voltage supply relay |
| SC1 | Fuse 1 on fuse holder C |
| SC2 | Fuse 2 on fuse holder C |
| T3aj | 3-pin connector |
| T10j | 10-pin connector |
| T16d | 16-pin connector |
| T38 | 38-pin connector |
| U13 | DC/AC converter with socket, 12 V - 230 V |
| 249 | Earth connection 2, in interior wiring harness |
| 639 | Earth point, left A-pillar |
| B157 | Positive connection 3 (15a), in interior wiring harness |
| B287 | Positive connection 11 (15a) in main wiring harness |
| B291 | Positive connection 15 (15a) in main wiring harness |
| B571 | Connection 38, in main wiring harness |
| * | Only models with stop/start system |
| *2 | Up to August 2012 |
| *3 | From August 2012 |
| E256 | TCS and ESP button |
| E540 | Auto-hold button |
| G65 | High-pressure sender |
| G238 | Air quality sensor |
| J519 | Onboard supply control unit |
| J540 | Control unit for electromechanical parking brake |
| J682 | Terminal 50 voltage supply relay |
| J710 | Voltage supply relay 2 |
| K213 | Electromechanical parking brake warning lamp |
| T3ae | 3-pin connector |
| T3dh | 3-pin connector |
| T6t | 6-pin connector |
| T26h | 26-pin connector |
| T30 | 30-pin connector |
| T52c | 52-pin connector |
| Y7 | Automatic anti-dazzle interior mirror |
| B287 | Positive connection 11 (15a) in main wiring harness |
| B509 | Connection 3 (diagnosis), in main wiring harness |
| B571 | Connection 38, in main wiring harness |
| * | Only models with Climatronic |
| *2 | Up to August 2012 |
| *3 | From October 2011 |
| *4 | From August 2012 |
| EX30 | Switch module 2 in centre console |
| E655 | Seat ventilation switch |
| E723 | Seat ventilation switch 2 |
| G266 | Oil level and oil temperature sender |
| J428 | Adaptive cruise control unit |
| J500 | Power steering control unit |
| J745 | Control unit for cornering light and headlight range control |
| J759 | Lane departure warning control unit |
| J769 | Lane change assist control unit |
| J770 | Lane change assist control unit 2 |
| SC3 | Fuse 3 on fuse holder C |
| SC4 | Fuse 4 on fuse holder C |
| T3bu | 3-pin connector |
| T3bv | 3-pin connector |
| T3dt | 3-pin connector |
| T4nv | 4-pin connector |
| T4vn | 4-pin connector |
| T6e | 6-pin connector, on left in engine compartment |
| T10d | 10-pin connector |
| T10y | 10-pin connector |
| T12ae | 12-pin connector |
| T12af | 12-pin connector |
| T12r | 12-pin connector |
| T26 | 26-pin connector |
| T26i | 26-pin connector |
| B163 | Positive connection 1 (15), in interior wiring harness |
| B277 | Positive connection 1 (15a) in main wiring harness |
| * | see applicable current flow diagram for engine |
| *2 | Only models with gas discharge headlights |
| *3 | Only models with adaptive cruise control (ACC) |
| *4 | According to equipment |
| *5 | Only models with ventilated seats |
| *6 | Up to September 2011 |
| *7 | From October 2011 |
| E102 | Headlight range control regulator |
| J285 | Control unit in dash panel insert |
| J533 | Data bus diagnostic interface |
| MX1 | Front left headlight |
| SC5 | Fuse 5 on fuse holder C |
| SC6 | Fuse 6 on fuse holder C |
| SC7 | Fuse 7 on fuse holder C |
| T8g | 8-pin connector |
| T10d | 10-pin connector |
| T10q | 10-pin connector |
| T14d | 14-pin connector |
| T20e | 20-pin connector |
| T32c | 32-pin connector |
| V48 | Left headlight range control motor |
| V49 | Right headlight range control motor |
| B279 | Positive connection 3 (15a) in main wiring harness |
| B282 | Positive connection 6 (15a) in main wiring harness |
| * | Only models with stop/start system |
| *2 | Only models with gas discharge headlights |
| G70 | Air mass meter |
| J262 | Rear roller blind control unit |
| J386 | Driver door control unit |
| J538 | Fuel pump control unit |
| J623 | Engine control unit |
| J926 | Rear driver side door control unit |
| J942 | Control unit for terminal control and engine start |
| SC10 | Fuse 10 on fuse holder C |
| SC11 | Fuse 11 on fuse holder C |
| SC12 | Fuse 12 on fuse holder C |
| T4l | 4-pin connector |
| T5f | 5-pin connector |
| T10p | 10-pin connector |
| T20g | 20-pin connector |
| T20l | 20-pin connector |
| T28a | 28-pin connector |
| T28c | 28-pin connector |
| T32g | 32-pin connector |
| T94 | 94-pin connector |
| B290 | Positive connection 14 (15a) in main wiring harness |
| B330 | Positive connection 16 (30a) in main wiring harness |
| S4 | Positive connection (30) 2, in central locking wiring harness |
| * | see applicable current flow diagram for engine |
| *2 | According to equipment |
| *3 | Up to September 2011 |
| *4 | Only models with stop/start system |
| *5 | From October 2011 |
| E313 | Selector lever |
| J39 | Headlight washer system relay |
| J519 | Onboard supply control unit |
| J743 | Mechatronic unit for dual clutch gearbox |
| 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 |
| T10o | 10-pin connector, under selector lever |
| T20m | 20-pin connector |
| T25 | 25-pin connector |
| T52b | 52-pin connector |
| B278 | Positive connection 2 (15a) in main wiring harness |
| B324 | Positive connection 10 (30a) in main wiring harness |
| * | Only models with dual clutch gearbox 02E |
| *2 | Only models with dual clutch gearbox 0AM |
| *3 | Only models with gas discharge headlights |
| *4 | Up to September 2011 |
| *5 | From October 2011 |
| *6 | From August 2012 |
| E234 | Rear lid handle release button |
| J387 | Front passenger door control unit |
| J393 | Convenience system central control unit |
| J540 | Control unit for electromechanical parking brake |
| J927 | Rear passenger side door control unit |
| J942 | Control unit for terminal control and engine start |
| SC24 | Fuse 24 on fuse holder C |
| SC25 | Fuse 25 on fuse holder C |
| SC26 | Fuse 26 on fuse holder C |
| SC27 | Fuse 27 on fuse holder C |
| SC28 | Fuse 28 on fuse holder C |
| T2xl | 2-pin connector |
| T4ux | 4-pin connector |
| T18a | 18-pin connector |
| T20h | 20-pin connector |
| T20k | 20-pin connector |
| T28b | 28-pin connector |
| T28c | 28-pin connector |
| T30 | 30-pin connector |
| T32g | 32-pin connector |
| S1 | Positive connection (30), in central locking wiring harness |
| * | According to equipment |
| *2 | Up to September 2011 |
| *3 | Only models with reversing camera system |
| *4 | From October 2011 |
| J9 | Heated rear window relay |
| J245 | Sliding sunroof adjustment control unit |
| J774 | Heated front seats control unit |
| J786 | Heated rear seats control unit |
| J882 | Seat heating control unit |
| SC29 | Fuse 29 on fuse holder C |
| SC30 | Fuse 30 on fuse holder C |
| SC31 | Fuse 31 on fuse holder C |
| SC32 | Fuse 32 on fuse holder C |
| T3aj | 3-pin connector |
| T6ah | 6-pin connector |
| T8ac | 8-pin connector |
| T8l | 8-pin connector |
| T10c | 10-pin connector |
| T15 | 15-pin connector |
| U13 | DC/AC converter with socket, 12 V - 230 V |
| B248 | Connection 2 (heated rear window), in interior wiring harness |
| B320 | Positive connection 6 (30a) in main wiring harness |
| B333 | Positive connection 19 (30a) in main wiring harness |
| B334 | Positive connection 20 (30a) in main wiring harness |
| B505 | Positive connection 9 (30a), in interior wiring harness |
| O4 | Positive connection (30as), in seat heating wiring harness |
| * | Only models with heated rear seats |
| *2 | Up to October 2011 |
| *3 | According to equipment |
| *4 | Only models with DC/AC converter with socket, 12 V-230 V/12 V-115 V |
| *5 | From November 2011 |
| *6 | From August 2012 |
| *7 | Up to August 2012 |
| J245 | Sliding sunroof adjustment control unit |
| J387 | Front passenger door control unit |
| J540 | Control unit for electromechanical parking brake |
| J774 | Heated front seats control unit |
| J927 | Rear passenger side door control unit |
| SC33 | Fuse 33 on fuse holder C |
| SC34 | Fuse 34 on fuse holder C |
| SC35 | Fuse 35 on fuse holder C |
| T6ah | 6-pin connector |
| T8ac | 8-pin connector |
| T10c | 10-pin connector, under driver seat |
| T20h | 20-pin connector |
| T20k | 20-pin connector |
| T28b | 28-pin connector |
| T28c | 28-pin connector |
| T30 | 30-pin connector |
| B319 | Positive connection 5 (30a) in main wiring harness |
| O4 | Positive connection (30as), in seat heating wiring harness |
| * | Only models with heated seats |
| *2 | According to equipment |
| *3 | Up to October 2011 |
| *4 | From November 2011 |
| E265 | Operating and display unit for rear air conditioning system |
| J126 | Fresh air blower control unit |
| J255 | Climatronic control unit |
| J301 | Air conditioning system control unit |
| J538 | Fuel pump control unit |
| J772 | Reversing camera system control unit |
| J942 | Control unit for terminal control and engine start |
| SC36 | Fuse 36 on fuse holder C |
| SC37 | Fuse 37 on fuse holder C |
| SC38 | Fuse 38 on fuse holder C |
| T5r | 5-pin connector |
| T6ai | 6-pin connector |
| T6be | 6-pin connector |
| T10f | 10-pin connector |
| T10p | 10-pin connector |
| T20b | 20-pin connector |
| T20c | 20-pin connector |
| T32g | 32-pin connector |
| T54b | 54-pin connector |
| B614 | Positive connection 23 (30a) in main wiring harness |
| * | According to equipment |
| *2 | Up to August 2012 |
| *3 | Only models with Climatic |
| *4 | Only models with Climatronic |
| *5 | Only models with reversing camera system |
| *6 | From October 2011 |
| E176 | Driver seat lumbar support adjustment switch |
| E177 | Front passenger seat lumbar support adjustment switch |
| E470 | Driver seat adjustment operating unit |
| E471 | Front passenger seat adjustment operating unit |
| J136 | Seat and steering column adjustment control unit with memory |
| S44 | Driver seat adjustment thermal fuse 1 |
| T6bm | 6-pin connector |
| T6cp | 6-pin connector |
| T6dc | 6-pin connector |
| T6dd | 6-pin connector |
| T10c | 10-pin connector |
| T10d | 10-pin connector |
| T12ab | 12-pin connector |
| B118 | Connection (driver side seat adjustment), in interior wiring harness |
| M1 | Positive connection 1 (30), in seat adjustment wiring harness |
| M2 | Positive connection 2 (30), in seat adjustment wiring harness |
| * | Only models with electric seat adjustment and memory function |
| *2 | Up to August 2012 |
| *3 | From August 2012 |
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