| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| J59 | X-contact relief relay |
| S10 | Fuse 10 in fuse holder |
| S163 | Fuse 2 (30), on battery fuse holder |
| S176 | Fuse 4 (30), on battery fuse holder |
| S177 | Fuse 2 (30), on battery fuse holder |
| S229 | Fuse 29 in fuse holder |
| T4 | 4-pin connector, near starter |
| T6 | 6-pin connector, brown, in protective housing for connectors on left in plenum chamber |
| 42 | Earth point, next to steering column |
| 81 | Earth connection 1, in dash panel wiring harness |
| 500 | Screw connection 1 (30), on relay plate |
| 501 | Screw connection 2 (30), on relay plate |
| 502 | Screw connection (30a), on relay plate |
| A2 | Positive connection (15), in dash panel wiring harness |
| A32 | Positive connection (30), in dash panel wiring harness |
| A41 | Positive connection (50), in dash panel wiring harness |
| A98 | Positive connection 4 (30), in dash panel wiring harness |
| J220 | Motronic control unit, centre 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 plug |
| T4a | 4-pin connector |
| T4b | 4-pin connector |
| T4c | 4-pin connector |
| T4d | 4-pin connector |
| T6 | 6-pin connector, brown, in protective housing for connectors on left in plenum chamber |
| T10a | 10-pin connector, in cable channel on left in engine compartment |
| T121 | 121-pin connector |
| 15 | Earth point, on cylinder head |
| 85 | Earth connection 1, in engine compartment wiring harness |
| 281 | Earth connection 1, in engine wiring harness |
| A104 | Positive connection 2 (15), in dash panel wiring harness |
| D52 | Positive connection (15a), in engine compartment wiring harness |
| G2 | Coolant temperature sender |
| G31 | Charge air pressure sender |
| G62 | Coolant temperature sender |
| G163 | Hall sender |
| J220 | Motronic control unit, centre in plenum chamber |
| T10a | 10-pin connector, in cable channel on left in engine compartment |
| T10d | 10-pin connector, green, in protective housing for connectors on left in plenum chamber |
| T121 | 121-pin connector |
| 220 | Earth connection (sender earth), in engine wiring harness |
| D101 | Connection 1, in engine wiring harness |
| G42 | Intake air temperature sender |
| G61 | Knock sensor 1 |
| G186 | Throttle valve drive (electric power control) |
| G187 | Throttle valve drive angle sender 1 (electric power control) |
| G188 | Throttle valve drive angle sender 2 (electric power control) |
| J220 | Motronic control unit, centre in plenum chamber |
| J338 | Throttle valve module |
| T3a | 3-pin connector, in rear of engine compartment |
| T6a | 6-pin connector |
| T10 | 10-pin connector, orange, in protective housing for connectors on left in plenum chamber |
| T121 | 121-pin connector |
| 139 | Earth connection (sender earth), in Motronic wiring harness |
| * | Fuel consumption display signal from engine control unit, only MFI |
| F88 | Power assisted steering pressure switch |
| G28 | Engine speed sender |
| G66 | Knock sensor 2 |
| J220 | Motronic control unit, centre in plenum chamber |
| N79 | Crankcase breather heater element |
| T3b | 3-pin connector, front in engine compartment |
| T3f | 3-pin connector, front in engine compartment |
| T10 | 10-pin connector, orange, in protective housing for connectors on left in plenum chamber |
| T121 | 121-pin connector |
| 131 | Earth connection 2, in engine compartment wiring harness |
| 139 | Earth connection (sender earth), in Motronic wiring harness |
| 220 | Earth connection (sender earth), in engine wiring harness |
| 608 | Earth point, centre in plenum chamber |
| * | Compressor switch-off |
| ** | Air conditioner "ready" connection |
| -●- | Only models with crankcase breather heater element |
| G70 | Air mass meter |
| J220 | Motronic control unit, centre in plenum chamber |
| N30 | Injector, cylinder 1 |
| N31 | Injector, cylinder 2 |
| N32 | Injector, cylinder 3 |
| N33 | Injector, cylinder 4 |
| S232 | Fuse 32 in fuse holder |
| T10 | 10-pin connector, orange, in protective housing for connectors on left in plenum chamber |
| T10a | 10-pin connector, in cable channel on left in engine compartment |
| T16 | 16-pin connector, centre in dash panel, self-diagnosis connection |
| T121 | 121-pin connector |
| A101 | Connection 3 (87), in dash panel wiring harness |
| D95 | Connection (injectors), in engine compartment wiring harness |
| E30 | Connection (87a), in engine wiring harness |
| G39 | Lambda probe |
| G79 | Accelerator position sender |
| G185 | Accelerator position sender 2 |
| J220 | Motronic control unit, centre in plenum chamber |
| N80 | Activated charcoal filter system solenoid valve 1 |
| T4b | 4-pin connector, in protective housing in rear of engine compartment |
| T6b | 6-pin connector |
| T10h | 10-pin connector, blue, in protective housing for connectors on left in plenum chamber |
| T121 | 121-pin connector |
| E30 | Connection (87a), in engine wiring harness |
| J104 | ABS/ABS with EDL control unit, on left in engine compartment |
| J220 | Motronic control unit, centre in plenum chamber |
| J234 | Airbag control unit, behind lower part of console |
| J293 | Radiator fan control unit, in front left of engine compartment |
| T2b | 2-pin connector, in cable channel on left in engine compartment |
| T10b | 10-pin connector |
| T10d | 10-pin connector, green, in protective housing for connectors on left in plenum chamber |
| T25 | 25-pin connector, on ABS/ABS with EDL control unit |
| T47 | 47-pin connector, on ABS control unit with EDL/TCS/ESP |
| T50 | 50-pin connector |
| T121 | 121-pin connector |
| V51 | Continued coolant circulation pump |
| 85 | Earth connection 1, in engine compartment wiring harness |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| A125 | Connection (crash signal), in dash panel wiring harness |
| J17 | Fuel pump relay |
| J220 | Motronic control unit, centre in plenum chamber |
| J234 | Airbag control unit, behind lower part of console |
| N75 | Charge pressure control solenoid valve |
| N249 | Turbocharger air recirculation valve |
| T10 | 10-pin connector, orange, in protective housing for connectors on left in plenum chamber |
| T10a | 10-pin connector, in cable channel on left in engine compartment |
| T10d | 10-pin connector, green, in protective housing for connectors on left in plenum chamber |
| T10h | 10-pin connector, blue, in protective housing for connectors on left in plenum chamber |
| T50 | 50-pin connector |
| T121 | 121-pin connector |
| A125 | Connection (crash signal), in dash panel wiring harness |
| D102 | Connection 2, in engine wiring harness |
| E45 | Cruise control system switch** |
| E227 | Cruise control system (CCS) SET button** |
| F | Brake light switch |
| F36 | Clutch pedal switch |
| F47 | Cruise control system brake pedal switch |
| J220 | Motronic control unit, centre in plenum chamber |
| S13 | Fuse 13 in fuse holder |
| T10 | 10-pin connector, orange, in protective housing for connectors on left in plenum chamber |
| T10d | 10-pin connector, green, in protective housing for connectors on left in plenum chamber |
| T10e | 10-pin connector, black, in protective housing for connectors on left in plenum chamber |
| T10s | 10-pin connector, next to steering column |
| T121 | 121-pin connector |
| A18 | Connection (54), in dash panel wiring harness |
| A20 | Connection (15a), in dash panel wiring harness |
| A27 | Connection (speed signal), in dash panel wiring harness |
| ** | Only models with CCS |
| G | Fuel gauge sender |
| G6 | Fuel pump |
| G32 | Coolant shortage indicator sender |
| S228 | Fuse 28 in fuse holder |
| S234 | Fuse 34 in fuse holder |
| S243 | Fuse 43 in fuse holder |
| T6 | 6-pin connector, brown, in protective housing for connectors on left in plenum chamber |
| T10a | 10-pin connector, in cable channel on left in engine compartment |
| 135 | Earth connection 2, in dash panel wiring harness |
| 269 | Earth connection (sender earth) 1, in dash panel wiring harness |
| 504 | Screw connection (87F), on relay plate |
| A99 | Connection 1 (87), in dash panel wiring harness |
| A100 | Connection 2 (87), in dash panel wiring harness |
| -●- | Only models with crankcase breather heater element |
| F1 | Oil pressure switch |
| G22 | Speedometer sender (Hall sender on gearbox) |
| H3 | Warning buzzer |
| J285 | Control unit with display in dash panel insert |
| K2 | Alternator warning lamp |
| K3 | Oil pressure warning lamp |
| K28 | Coolant temperature/coolant shortage warning lamp |
| K132 | Electronic power control fault lamp |
| S5 | Fuse 5 in fuse holder |
| S7 | Fuse 7 in fuse holder |
| T10a | 10-pin connector, in cable channel on left in engine compartment |
| T32 | 32-pin connector, blue |
| T32a | 32-pin connector, green |
| 85 | Earth connection 1, in engine compartment wiring harness |
| 608 | Earth point, centre in plenum chamber |
| B163 | Positive connection 1 (15), in interior wiring harness |
| * | Fuel consumption display signal from engine control unit, only MFI |
| E86 | Multifunction display call-up button |
| E109 | Multifunction display memory switch |
| G1 | Fuel gauge |
| G3 | Coolant temperature gauge |
| G17 | Ambient temperature sensor |
| G21 | Speedometer |
| J119 | Multifunction display |
| J285 | Control unit with display in dash panel insert |
| K105 | Reserve fuel warning lamp |
| T6e | 6-pin connector |
| T16 | 16-pin connector, centre in dash panel, self-diagnosis connection |
| T32 | 32-pin connector, blue |
| T32a | 32-pin connector, green |
| A13 | Connection (door contact switch), in dash panel wiring harness |
| A27 | Connection (speed signal), in dash panel wiring harness |
| A76 | Connection (K-diagnosis wire), in dash panel wiring harness |
| * | Revolution signal from engine control unit |
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