| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| T1a | Single connector, blue, in engine compartment |
| T6z | 6-pin connector, red, connector point, electronics box, plenum chamber |
| T10 | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| A17 | Connection (61), in dash panel wiring harness |
| 11 | Earth point, in plenum chamber |
| 81 | Earth connection -1-, in dash panel wiring harness |
| G2 | Coolant temperature sender |
| G62 | Coolant temperature sender |
| G66 | Knock sensor II |
| G70 | Air mass meter |
| J17 | Fuel pump relay |
| J220 | Motronic control unit |
| N30 | Injector, cylinder 1 |
| N31 | Injector, cylinder 2 |
| N32 | Injector, cylinder 3 |
| N33 | Injector, cylinder 4 |
| N75 | Charge pressure control solenoid valve |
| N80 | Activated charcoal filter system solenoid valve 1 |
| S228 | Fuse in fuse box |
| S229 | Fuse in fuse box |
| T3q | 3-pin connector, blue, in engine compartment, left |
| T6z | 6-pin connector, red, connector point, electronics box, plenum chamber |
| T10m | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T10z | 10-pin connector, yellow, connector point, electronics box, plenum chamber |
| D22 | Positive (+) connection (87a for injectors), in engine compartment wiring harness, right |
| D23 | Positive (+) connection (87f), in engine compartment wiring harness, right |
| 12 | Earth point, in engine compartment, left |
| 19 | Earth point, near ignition coil |
| 83 | Earth connection -1-, in front right wiring harness |
| 139 | Earth connection (sender earth), in Motronic wiring harness |
| E87 | Control and display unit for air conditioner/Climatronic |
| F96 | Altitude sender |
| G40 | Hall sender |
| G42 | Intake air temperature sender |
| G61 | Knock sensor I |
| J189 | Auto-check system |
| J220 | Motronic control unit |
| J338 | Throttle valve control unit |
| T3p | 3-pin connector, green, in engine compartment, left |
| T6z | 6-pin connector, red, connector point, electronics box, plenum chamber |
| T10 | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| T10y | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| 83 | Earth connection -1-, in front right wiring harness |
| 139 | Earth connection (sender earth), in Motronic wiring harness |
| * | Remaining wiring valid Current Flow Diagram automatic gearbox |
| ** | Models with air conditioner |
| *** | Only models with auto-check system |
| E15 | Heated rear window switch |
| G28 | Engine speed sender |
| G39 | Lambda probe |
| J220 | Motronic control unit |
| J362 | Immobilizer control unit |
| T3m | 3-pin connector, grey, in engine compartment, left |
| T4y | 4-pin connector, black, in engine compartment, right |
| T10 | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| T10m | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T10z | 10-pin connector, yellow, connector point, electronics box, plenum chamber |
| Z19 | Lambda probe heater |
| 83 | Earth connection -1-, in front right wiring harness |
| A27 | Connection (speed signal), in dash panel wiring harness |
| A45 | Connection (engine speed signal), in dash panel wiring harness |
| A64 | Connection (30, speed boost), in dash panel wiring harness |
| * | Wiring not fitted on models with air conditioner |
| D | Ignition/starter switch |
| N | Ignition coil |
| N122 | Final output stage |
| N128 | Ignition coil 2 |
| N158 | Ignition coil 3 |
| N163 | Ignition coil 4 |
| P | Spark plug connector |
| Q | Spark plugs |
| S5 | Fuse in fuse box |
| S232 | Fuse in fuse box |
| T3f | 3-pin connector, black, at ignition coil 1 |
| T3g | 3-pin connector, black, at ignition coil 2 |
| T3h | 3-pin connector, black, at ignition coil 3 |
| T3i | 3-pin connector, black, at ignition coil 4 |
| T4f | 4-pin connector, black, at output stage (4-cylinder turbo engine), AEB |
| T5c | 5-pin connector, black, at output stage |
| T6z | 6-pin connector, red, connector point, electronics box, plenum chamber |
| 18 | Earth point, on cylinder block |
| 83 | Earth connection -1-, in front right wiring harness |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A74 | Connection (15a, fuse 5), in dash panel wiring harness |
| D131 | Connection (15) via fuse 232, in engine compartment wiring harness |
| E87 | Control and display unit for air conditioner |
| F1 | Oil pressure switch (1.8 bar) |
| F66 | Coolant shortage indicator switch |
| G | Fuel gauge sender |
| G6 | Fuel pump (pre-supply pump) |
| G68 | Vehicle speed sender |
| J104 | ABS with EDL control unit |
| J217 | Automatic gearbox control unit |
| J218 | Combi-processor in dash panel insert |
| J234 | Airbag control unit |
| J362 | Immobilizer control unit |
| K2 | Alternator warning lamp |
| S15 | Fuse in fuse box |
| T4a | 4-pin connector, black, on dash panel insert |
| T6e | 6-pin connector, blue, left connector point, A pillar |
| T10a | 10-pin connector, brown, left connector point, A pillar |
| T10m | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T16 | 16-pin connector, (diagnosis connection) in centre console rear |
| T26 | 26-pin connector, yellow, on dash panel insert |
| T26a | 26-pin connector, blue, on dash panel insert |
| A32 | Positive (+) connection (30), in dash panel wiring harness |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| A50 | Positive (+) connection (30as), in dash panel wiring harness |
| 83 | Earth connection -1-, in front right wiring harness |
| 86 | Earth connection -1-, in rear wiring harness |
| 135 | Earth connection -2-, in dash panel wiring harness |
