| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| J59 | X contact relief relay |
| T2k | 2-pin connector, on engine |
| T4l | 4-pin connector, on engine |
| T6l | 6-pin connector, brown, in protective housing for connectors, on left in plenum chamber |
| 500 | Screw connection -1- (30), on relay plate |
| 501 | Screw connection -2- (30), on relay plate |
| 502 | Screw connection -1- (30a), on relay plate |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A32 | Positive (+) connection (30), in dash panel wiring harness |
| * | Only models with air conditioner |
| J220 | Motronic 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 plugs |
| T6l | 6-pin connector, brown, in predective housing for connectors, in plenum chamber, left |
| T14a | 14-pin connector, in cable channel left |
| 15 | Earth point, on cylinder head |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| 281 | Earth connection -1-, in engine prewiring wiring harness |
| A104 | Positive (+) connection -2- (15), in dash panel wiring harness |
| D10 | Positive (+) connection (30), in front right wiring harness |
| D52 | Positive (+) connection (15a), in engine compartment wiring harness |
| G27 | Engine temperature sender |
| G266 | Oil level/oil temperature sender |
| J220 | Motronic control unit |
| J293 | Radiator fan control unit |
| N323 | Ignition coil -5- with final output stage |
| P | Spark plug connector |
| Q | Spark plugs |
| V51 | Continued coolant circulation pump |
| T14a | 14-pin connector, in cable channel left |
| 10 | Earth point, in plenum chamber |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| 281 | Earth connection -1-, in engine prewiring wiring harness |
| D52 | Positive (+) connection (15a), in engine compartment wiring harness |
| * | Only models with maintenance intermittent extension |
| G2 | Coolant temperature sender |
| G61 | Knock sensor I |
| G62 | Coolant temperature sender |
| G66 | Knock sensor II |
| J220 | Motronic control unit |
| T2r | 2-pin connector, on cylinder head, left |
| T3e | 3-pin connector, near intake manifold |
| T10d | 10-pin connector, green, in predective housing for connectors, in plenum chamber, left |
| T14a | 14-pin connector, in cable channel left |
| 139 | Earth connection (sender earth), in Motronic wiring harness |
| 220 | Earth connection (sender earth), in engine wiring harness |
| 241 | Earth connection -2-, engine earth, in engine wiring harness |
| G28 | Engine speed sender |
| G186 | Thredtle valve drive (electric thredtle operation) |
| G187 | Thredtle valve drive angle sender -1- (electric thredtle operation) |
| G188 | Thredtle valve drive angle sender -2- (electric thredtle operation) |
| J220 | Motronic control unit |
| J293 | Radiator fan control unit |
| J338 | Thredtle valve control unit |
| T3b | 3-pin connector, on radiator |
| T10 | 10-pin connector, orange, in predective housing for connectors, in plenum chamber, left |
| 220 | Earth connection (sender earth), in engine wiring harness |
| * | Only models with multi-function display |
| J220 | Motronic control unit |
| N30 | Injector, cylinder 1 |
| N31 | Injector, cylinder 2 |
| N32 | Injector, cylinder 3 |
| N33 | Injector, cylinder 4 |
| N83 | Injector, cylinder 5 |
| S232 | Fuse in fuse box |
| T10 | 10-pin connector, orange, in predective housing for connectors, in plenum chamber, left |
| T10d | 10-pin connector, green, in predective housing for connectors, in plenum chamber, left |
| T14a | 14-pin connector, in cable channel left |
| 10 | Earth point, in plenum chamber |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| B168 | Connection (86), in interior wiring harness |
| D95 | Connection (injectors), in engine compartment wiring harness |
| * | Wire W for self-diagnosis |
| G39 | Lambda probe |
| G130 | Lambda probe after catalyst |
| J220 | Motronic control unit |
| J299 | Secondary air pump relay |
| N80 | Activated charcoal filter system solenoid valve 1 (pulsed) |
| Z19 | Lambda probe heater |
| Z29 | Lambda probe 1 heater, downstream of catalytic converter |
| T4p | 4-pin connector, centre in engine compartment |
| T6q | 6-pin connector, on exhaust pipe |
| D108 | Connection -6-, in engine compartment wiring harness |
| E7 | Positive (+) connection (87a), in Motronic wiring harness |
| F1 | Oil pressure switch |
| G22 | Speedometer sender |
| H11 | Oil pressure warning buzzer |
| J285 | Control unit with display in dash panel insert |
| K2 | Alternator warning lamp |
| K3 | Oil pressure warning lamp |
| K28 | Coolant temperature warning lamp/coolant shortage warning lamp |
| K83 | Exhaust emissions warning lamp |
| K132 | Electronic power control fault lamp |
| S7 | Fuse in fuse box/relay plate |
| T14a | 14-pin connector, in cable channel left |
| B163 | Positive (+) connection -1- (15), in interior wiring harness |
| * | Only models with multi-function display |
| E86 | Multi-function display call-up button |
| E109 | Multi-function display, memory switch |
| G1 | Fuel gauge |
| G3 | Coolant temperature gauge |
| G5 | Rev. counter |
| G21 | Speedometer |
| J119 | Multi-function display |
| J285 | Control unit with display in dash panel insert |
| K105 | Reserve fuel warning lamp |
| A13 | Connection (door contact switch), in dash panel wiring harness |
| * | Only models with multi-function display |
| ** | Wire W for self-diagnosis |