| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| F18 | Radiator fan thermal switch |
| K2 | Alternator warning lamp |
| S132 | Fuse in fuse holder on the battery |
| S138 | Fuse in fuse holder on the battery |
| S164 | Fuse in fuse holder on the battery |
| T1a | 1-pin connector, at starter |
| T2f | 2-pin connector, at alternator |
| T2g | 2-pin connector, in the holder on the starter |
| T3f | 3-pin connector, on the fuse holder on the battery |
| T3g | 3-pin connector, at radiator fan thermal switch |
| T3h | 3-pin connector, in the holder on the left radiator |
| T6a | 6-pin connector, in plenum chamber (red) |
| T10a | 10-pin connector, in plenum chamber (white) |
| V7 | Radiator fan |
| 12 | Earth point, below the battery on the left |
| P1 | Positive connection (30), in fuse holder on the battery |
| * | only on vehicles with manual gearbox |
| ** | only on vehicles without air conditioning system |
| G28 | Engine speed sender |
| G42 | Intake air temperature sender |
| J217 | Control unit for automatic gearbox |
| J220 | Motronic control unit |
| J293 | Radiator fan control unit |
| N30 | Injector, cylinder 1 |
| N31 | Injector, cylinder 2 |
| N32 | Injector, cylinder 3 |
| N33 | Injector, cylinder 4 |
| N205 | Camshaft timing adjustment valve |
| T2a | 2-pin connector, at injector, cylinder 1 |
| T2b | 2-pin connector, at injector, cylinder 2 |
| T2c | 2-pin connector, at injector, cylinder 3 |
| T2d | 2-pin connector, at injector, cylinder 4 |
| T2h | 2-pin connector, at intake air temperature sender |
| T2i | 2-pin connector, at camshaft timing adjustment valve |
| T3l | 3-pin connector, at engine speed sender |
| T6a | 6-pin connector, in plenum chamber (red) |
| T10f | 10-pin connector, in left wiring duct (black) |
| T10m | 10-pin connector, at radiator fan control unit |
| T28a | 28-pin connector, at Motronic control unit |
| T52a | 52-pin connector, at Motronic control unit |
| T68a | 68-pin connector, at control unit for automatic gearbox |
| D140 | Connection (injectors), in engine wiring harness |
| D142 | Connection, in engine prewiring wiring harness |
| * | only on vehicles with air conditioning system |
| ** | only on vehicles with automatic gearbox |
| G39 | Lambda probe |
| G70 | Air mass meter |
| J217 | Control unit for automatic gearbox |
| J220 | Motronic control unit |
| K | Dash panel insert |
| N80 | Activated charcoal filter system solenoid valve |
| T2o | 2-pin connector, at activated charcoal filter system solenoid valve |
| T3o | 3-pin connector, at air mass meter |
| T4b | 4-pin connector, near lambda probe |
| T10a | 10-pin connector, in plenum chamber (white) |
| T32b | 32-pin connector, at dash panel insert (green) |
| T52a | 52-pin connector, at Motronic control unit |
| T68a | 68-pin connector, at control unit for automatic gearbox |
| Z19 | Lambda probe heater |
| E32 | Connection (87), in engine compartment wiring harness |
| * | only on vehicles with automatic gearbox |
| only on vehicles with multi-function display |
| G40 | Hall sender |
| G61 | Knock sensor I |
| G66 | Knock sensor II |
| J220 | Motronic control unit |
| N79 | Heater element of crankcase breather (vehicles with optional equipment) |
| T2j | 2-pin connector, at heating resistor for crankcase ventilation |
| T3i | 3-pin connector, at Hall sender |
| T3m | 3-pin connector, at knock sensor I |
| T3n | 3-pin connector, at knock sensor Il |
| T28a | 28-pin connector, at Motronic control unit |
| T52a | 52-pin connector, at Motronic control unit |
| 10 | Earth point, in plenum chamber |
| 85 | Earth connection, in engine compartment wiring harness |
| D141 | Connection (5V), in engine wiring harness |
| D142 | Connection, in engine prewiring wiring harness |
| * | only on vehicles with manual gearbox |
| Vehicles with optional equipment |
| F60 | Idling switch |
| G22 | Speedometer sender |
| G69 | Throttle valve potentiometer |
| G127 | Throttle valve positioner sender |
| J220 | Motronic control unit |
| J338 | Throttle valve control unit |
| N | Ignition coil 1 |
| N122 | Final output stage 1 |
| N128 | Ignition coil 2 |
| N192 | Final output stage 2 |
| P | Spark plug connector |
| Q | Spark plug |
| T3j | 3-pin connector, at speedometer sender |
| T4j | 4-pin connector, at the final output stage |
| T8e | 8-pin connector, on the throttle valve control unit |
| T10f | 10-pin connector, in left wiring duct (black) |
| T28a | 28-pin connector, at Motronic control unit |
| V60 | Throttle valve positioner |
| 110 | Earth connection, in wiring harness behind dash panel |
| 250 | Earth connection, in engine prewiring wiring harness |
| A2 | Positive connection (15), in wiring harness behind dash panel |
| D141 | Connection (5V), in engine wiring harness |
| D142 | Connection, in engine prewiring wiring harness |
| J17 | Fuel pump relay |
| T6a | 6-pin connector, in plenum chamber (red) |
| T10a | 10-pin connector, in plenum chamber (white) |
| T10f | 10-pin connector, in left wiring duct (black) |
| 119 | Earth connection, in front left wiring harness |
| A2 | Positive connection (15), in wiring harness behind dash panel |
| A38 | Positive connection (15a), in wiring harness behind dash panel, left |
| A40 | Positive connection (30), in wiring harness behind dash panel, left |
| A99 | Connection (87), in wiring harness behind dash panel |
| A100 | Connection (87), in wiring harness behind dash panel, left |
| A101 | Connection (87), in wiring harness behind dash panel, left |
| Vehicles with optional equipment |
| F1 | Oil pressure switch |
| G | Fuel gauge sender |
| G1 | Fuel gauge |
| G2 | Coolant temperature gauge sender |
| G5 | Rev. Counter |
| G6 | Fuel pump |
| G62 | Coolant temperature sender |
| J218 | Combi-processor in dash panel insert |
| K | Dash panel insert |
| K3 | Oil pressure warning lamp |
| K16 | Reserve fuel warning lamp |
| T4a | 4-pin connector, on the fuel pump |
| T4i | 4-pin connector, at coolant temperature sender |
| T10f | 10-pin connector, in left wiring duct (black) |
| T32a | 32-pin connector, at dash panel insert (blue) |
| T32b | 32-pin connector, at dash panel insert (green) |
| 81 | Earth connection, in wiring harness behind dash panel |
| 110 | Earth connection, in wiring harness behind dash panel |
| 250 | Earth connection, in engine prewiring wiring harness |
| A27 | Connection (speed signal), in wiring harness behind dash panel, left (only on vehicles with central locking) |
| D142 | Connection, in engine prewiring wiring harness |
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