| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| J519 | Onboard supply control unit |
| S162 | Fuse 1 (30), in battery fuse holder |
| S163 | Fuse 2 (30), in battery fuse holder |
| S178 | Fuse 6 (30), in battery fuse holder |
| SB26 | Fuse 26 on fuse holder B |
| T2 | 2-pin connector, near starter |
| T3a | 3-pin connector, grey, on right of bulkhead |
| T6n | 6-pin connector, blue, on right of bulkhead |
| T6w | 6-pin connector, grey, on right of bulkhead |
| T11a | 11-pin connector, white, on right of bulkhead |
| T12a | 12-pin connector, white, on right of bulkhead |
| T18a | 18-pin connector, brown |
| 11 | Earth point, in battery box |
| B170 | Positive connection 2 (30), in interior wiring harness |
| D | Ignition/starter switch |
| J17 | Fuel pump relay |
| J519 | Onboard supply control unit |
| J643 | Fuel supply relay |
| SB4 | Fuse 4 on fuse holder B |
| SB9 | Fuse 9 on fuse holder B |
| SB14 | Fuse 14 on fuse holder B |
| SB25 | Fuse 25 on fuse holder B |
| SB45 | Fuse 45 on fuse holder B |
| T6r | 6-pin connector, brown, on right of bulkhead |
| T16a | 16-pin connector, black |
| T18a | 18-pin connector, brown |
| A15 | Positive connection (15), in instrument wiring harness |
| A32 | Positive connection (30), in dash panel wiring harness |
| A40 | Positive connection 1 (30), in dash panel wiring harness |
| A52 | Positive connection 2 (30), in dash panel wiring harness |
| A99 | Connection 1 (87) in dash panel wiring harness |
| A104 | Positive connection 2 (15), in dash panel wiring harness |
| B169 | Positive connection 1 (30), in interior wiring harness |
| B170 | Positive connection 2 (30), in interior wiring harness |
| J235 | Coolant pump relay |
| J317 | Terminal 30 voltage supply relay |
| J519 | Onboard supply control unit |
| J623 | Engine control unit |
| SB5 | Fuse 5 on fuse holder B |
| SB37 | Fuse 37 on fuse holder B |
| SB41 | Fuse 41 on fuse holder B |
| T6n | 6-pin connector, blue, on right of bulkhead |
| T6w | 6-pin connector, grey, on right of bulkhead |
| T11b | 11-pin connector, red, on right of bulkhead |
| T11c | 11-pin connector, blue, on right of bulkhead |
| T14 | 14-pin connector, on left in engine compartment |
| T121 | 121-pin connector |
| V51 | Continued coolant circulation pump |
| 29 | Earth point, on left in engine compartment, behind battery |
| 131 | Earth connection 2, in engine compartment wiring harness |
| 281 | Earth point 1, engine prewiring harness |
| A99 | Connection 1 (87) in dash panel wiring harness |
| A177 | Connection 6 (87) in dash panel wiring harness |
| B169 | Positive connection 1 (30), in interior wiring harness |
| J519 | Onboard supply control unit |
| J623 | Engine control unit |
| 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 plug |
| T6r | 6-pin connector, brown, on right of bulkhead |
| T6w | 6-pin connector, grey, on right of bulkhead |
| T11b | 11-pin connector, red, on right of bulkhead |
| T14 | 14-pin connector, on left in engine compartment |
| T121 | 121-pin connector |
| 15 | Earth point, on cylinder head |
| 91 | Earth connection 1, in fully electronic ignition system wiring harness |
| A27 | Connection (speed signal), in dash panel wiring harness |
| 281 | Earth point 1, engine prewiring harness |
| F1 | Positive connection (15), in fully electronic ignition wiring harness |
| E45 | Cruise control system switch |
| G42 | Intake air temperature sender |
| G61 | Knock sensor 1 |
| G62 | Coolant temperature sender |
| G66 | Knock sensor 2 |
| J519 | Onboard supply control unit |
| J623 | Engine control unit |
| T6y | 6-pin connector, brown |
| T11a | 11-pin connector, white, on right of bulkhead |
| T41 | 41-pin connector |
| T121 | 121-pin connector |
| 200 | Earth connection (screening), in engine compartment wiring harness |
| 283 | Earth connection 2, engine prewiring harness |
| A130 | Connection (CCS), in dash panel wiring harness |
| * | Only models with CCS |
| F | Brake light switch |
| F36 | Clutch pedal switch |
| F47 | Brake pedal switch |
| G79 | Accelerator position sender |
| G185 | Accelerator position sender 2 |
| 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 |
| J623 | Engine control unit |
| T6n | 6-pin connector, blue, on right of bulkhead |
| T11c | 11-pin connector, blue, on right of bulkhead |
| T121 | 121-pin connector |
| A89 | Connection 2 (54) in dash panel wiring harness |
| A100 | Connection 2 (87) in dash panel wiring harness |
| D73 | Positive connection (54), in engine compartment wiring harness |
| D101 | Connection 1, in engine compartment wiring harness |
| G39 | Lambda probe |
| G130 | Lambda probe after catalytic converter |
| J519 | Onboard supply control unit |
| J623 | Engine control unit |
| T4z | 4-pin connector |
| T6z | 6-pin connector |
| T11a | 11-pin connector, white, on right of bulkhead |
| T16a | 16-pin connector, black |
| T121 | 121-pin connector |
| Z19 | Lambda probe heater |
| Z29 | Lambda probe 1 heater after catalytic converter |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| D159 | Connection (high bus), in engine compartment wiring harness |
| D160 | Connection (low bus), in engine compartment wiring harness |
| E29 | Connection, in engine wiring harness |
| J299 | Secondary air pump relay |
| J519 | Onboard supply control unit |
| J623 | Engine control unit |
| N75 | Charge pressure control solenoid valve |
| N80 | Activated charcoal filter solenoid valve 1 |
| N112 | Secondary air inlet valve |
| N205 | Camshaft control valve 1 |
| N249 | Turbocharger air recirculation valve |
| T6w | 6-pin connector, grey, on right of bulkhead |
| T11a | 11-pin connector, white, on right of bulkhead |
| T11b | 11-pin connector, red, on right of bulkhead |
| T14 | 14-pin connector, on left in engine compartment |
| T121 | 121-pin connector |
| V101 | Secondary air pump motor |
| A152 | Connection 5 (87) in dash panel wiring harness |
| E7 | Connection (87a), in Motronic wiring harness |
| E30 | Connection (87a), in engine wiring harness |
| G70 | Air mass meter |
| J500 | Power steering control unit |
| J519 | Onboard supply control unit |
| J533 | Data bus diagnostic interface |
| J623 | Engine control unit |
| N30 | Injector, cylinder 1 |
| N31 | Injector, cylinder 2 |
| N32 | Injector, cylinder 3 |
| N33 | Injector, cylinder 4 |
| T6n | 6-pin connector, blue, on right of bulkhead |
| T11b | 11-pin connector, red, on right of bulkhead |
| T14 | 14-pin connector, on left in engine compartment |
| T16b | 16-pin connector, diagnostic connector |
| T18a | 18-pin connector, brown |
| T121 | 121-pin connector |
| A76 | Connection (K-diagnosis wire), in dash panel wiring harness |
| A139 | Connection 3 (15) in dash panel wiring harness |
| D17 | Positive connection 1 (15), in engine harness |
| D140 | Connection (injectors), in engine prewiring harness |
| F1 | Oil pressure switch |
| G | Fuel gauge sender |
| G1 | Fuel gauge |
| G6 | Fuel system pressurisation pump |
| G266 | Oil level and oil temperature sender |
| J285 | Control unit in dash panel insert |
| J519 | Onboard supply control unit |
| K3 | Oil pressure warning lamp |
| K83 | Exhaust emissions warning lamp |
| K105 | Reserve fuel warning lamp |
| K132 | Electronic power control fault lamp |
| T6v | 6-pin connector, green, on right of bulkhead |
| T11b | 11-pin connector, red, on right of bulkhead |
| T14 | 14-pin connector, on left in engine compartment |
| T32a | 32-pin connector, black |
| 81 | Earth connection 1, in dash panel wiring harness |
| 199 | Earth connection 3, in dash panel wiring harness |
| 269 | Earth connection (sender earth) 1, in dash panel wiring harness |
| 606 | Earth point, under the centre console near gear stick |
| D103 | Connection 3, in engine compartment wiring harness |
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