| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| J519 | Onboard supply control unit |
| SA1 | Fuse 1 in fuse holder A |
| SA5 | Fuse 5 in fuse holder A |
| SC27 | Fuse 27 on fuse holder C |
| T2 | 2-pin connector |
| T4t | 4-pin connector, near starter |
| T52c | 52-pin connector |
| 1 | Earth strap, battery - body |
| 14 | Earth point, on gearbox |
| 508 | Threaded connection (30) on E-box |
| 652 | Earth point, engine and gearbox earth |
| B169 | Positive connection 1 (30), in interior wiring harness |
| B177 | Connection (61), in interior wiring harness |
| * | Only models with 90A/ 110A alternator |
| *2 | Only models with 140 A/ 180 A alternator |
| J329 | Terminal 15 voltage supply relay |
| J519 | Onboard supply control unit |
| J682 | Terminal 50 voltage supply relay |
| SC1 | Fuse 1 on fuse holder C |
| SC2 | Fuse 2 on fuse holder C |
| SC4 | Fuse 4 on fuse holder C |
| SB6 | Fuse 6 on fuse holder B |
| SB7 | Fuse 7 on fuse holder B |
| T40 | 40-pin connector |
| T52b | 52-pin connector |
| 508 | Threaded connection (30) on E-box |
| A41 | Positive connection (50), in dash panel wiring harness |
| A192 | Positive connection 3 (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 |
| B278 | Positive connection 2 (15a) in main wiring harness |
| B504 | Positive connection 8 (30a), in interior wiring harness |
| J151 | Continued coolant circulation relay |
| J519 | Onboard supply control unit |
| J623 | Engine control unit, central in plenum chamber |
| T2yg | 2-pin connector |
| T94 | 94-pin connector |
| V51 | Continued coolant circulation pump |
| 131 | Earth connection 2, in engine compartment wiring harness |
| 607 | Earth point, on left in plenum chamber |
| D78 | Positive connection 1 (30a), in engine compartment wiring harness |
| D110 | Connection 8 in engine compartment wiring harness |
| D182 | Connection 3 (87a) in engine compartment wiring harness |
| J519 | Onboard supply control unit |
| J623 | Engine control unit, central in plenum chamber |
| N70 | Ignition coil 1 with output stage |
| N127 | Ignition coil 2 with output stage |
| N291 | Ignition coil 3 with output stage |
| N292 | Ignition coil 4 with output stage |
| P | Spark plug connector |
| Q | Spark plugs |
| T14a | 14-pin connector, near battery |
| T60 | 60-pin connector |
| 15 | Earth point, on cylinder head |
| 85 | Earth connection 1, in engine compartment wiring harness |
| 281 | Earth point 1, engine prewiring harness |
| 642 | Earth point for electronically controlled fan |
| D206 | Connection 4 (87a) in engine prewiring harness |
| G42 | Intake air temperature sender |
| G62 | Coolant temperature sender |
| G186 | Throttle valve drive for electric throttle |
| G187 | Throttle valve drive angle sender 1 for electric throttle |
| G188 | Throttle valve drive angle sender 2 for electric throttle |
| J338 | Throttle valve module |
| J519 | Onboard supply control unit |
| J527 | Steering column electronics control unit |
| J623 | Engine control unit, central in plenum chamber |
| T6x | 6-pin connector |
| T20d | 20-pin connector |
| T60 | 60-pin connector |
| T94 | 94-pin connector |
| B441 | Connection (CCS), in main wiring harness |
| D102 | Connection 2 in engine compartment wiring harness |
| * | Up to July 2010 |
| *2 | From August 2010 |
| J519 | Onboard supply control unit |
| J623 | Engine control unit, central in plenum chamber |
| N75 | Charge pressure control solenoid valve |
| N80 | Activated charcoal filter solenoid valve 1 |
| N205 | Camshaft control valve 1 |
| N249 | Turbocharger air recirculation valve |
| N316 | Intake manifold flap valve |
| N428 | Valve for oil pressure control |
| T4x | 4-pin connector, on radiator fan, bottom left |
| T14a | 14-pin connector, near battery |
| T60 | 60-pin connector |
| T94 | 94-pin connector |
| D180 | Connection (87a), in engine compartment wiring harness |
| D189 | Connection (87a) in engine prewiring harness |
| * | Radiator fan connection |
| *2 | According to equipment |
| G39 | Lambda probe |
| G266 | Oil level and oil temperature sender |
| J519 | Onboard supply control unit |
| J623 | Engine control unit, central in plenum chamber |
| T6w | 6-pin connector, in rear of engine compartment |
| T6z | 6-pin connector |
| T94 | 94-pin connector |
| Z19 | Lambda probe heater |
| 376 | Earth connection 11, in main wiring harness |
| 381 | Earth connection 16, in main wiring harness |
| 655 | Earth point, on left headlight |
| E7 | Connection (87a), in Motronic wiring harness |
| J519 | Onboard supply control unit |
| J623 | Engine control unit, central in plenum chamber |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| T94 | 94-pin connector |
| 44 | Earth point, lower part of left A-pillar |
| 367 | Earth connection 2, in main wiring harness |
| 389 | Earth connection 24, in main wiring harness |
| 605 | Earth point, on top end of steering column |
| B383 | Connection 1 (powertrain CAN bus, high), in main wiring harness |
| B390 | Connection 1 (powertrain CAN bus, low), in main wiring harness |
| J119 | Multifunction indicator |
| J285 | Control unit in dash panel insert |
| J519 | Onboard supply control unit |
| J533 | Data bus diagnostic interface, in left footwell, near centre console |
| K83 | Exhaust emissions warning lamp |
| K132 | Electronic power control fault lamp |
| T16 | 16-pin connector, on left under dash panel |
| T20 | 20-pin connector |
| T32 | 32-pin connector |
| T52c | 52-pin connector |
| B383 | Connection 1 (powertrain CAN bus, high), in main wiring harness |
| B390 | Connection 1 (powertrain CAN bus, low), in main wiring harness |
| B397 | Connection 1 (convenience CAN bus, high), in main wiring harness |
| B398 | Connection 2 (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 |
| F22 | Oil pressure switch |
| F266 | Bonnet contact switch |
| F378 | Oil pressure switch for reduced oil pressure |
| G1 | Fuel gauge |
| G3 | Coolant temperature gauge |
| G32 | Coolant shortage indicator sender |
| H3 | Buzzer and gong |
| J285 | Control unit in dash panel insert |
| J519 | Onboard supply control unit |
| K3 | Oil pressure warning lamp |
| K31 | Cruise control system warning lamp |
| K38 | Oil level warning lamp |
| K105 | Reserve fuel warning lamp |
| T14a | 14-pin connector, near battery |
| T32 | 32-pin connector |
| T52a | 52-pin connector |
| 410 | Earth connection 1 (sender earth) in main wiring harness |
| * | According to equipment |
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