| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| J59 | X contact relief relay |
| J226 | Starter inhibitor and reversing light relay |
| S163 | Fuse -2- (30), in fuse box/battery |
| S176 | Fuse -4- (30), in fuse box/battery |
| S177 | Fuse -5- (30), in fuse box/battery |
| T2e | 2-pin connector, near starter (only models without air conditioner) |
| T4 | 4-pin connector, near starter (only models with air conditioner) |
| T6 | 6-pin connector, brown, in control unit protective housing, in plenum chamber, left |
| T10w | 10-pin connector, white, in protective housing for connectors, in plenum chamber, left |
| 500 | Screw connection -1- (30), on relay plate |
| 502 | Screw connection -1- (30a), on relay plate |
| A41 | Positive (+) connection (50), in dash panel wiring harness (up to April 2001) |
| * | Only models with manual gearbox |
| --- | Only models with automatic gearbox |
| ** | Up to August 2000 |
| -••- | From September 2000 |
| --••- | Up to April 2001 |
| N | Ignition coil 1, on cylinder head |
| N122 | Final output stage for ignition coils, in engine compartment rear |
| N128 | Ignition coil 2, on cylinder head |
| N158 | Ignition coil 3, on cylinder head |
| N163 | Ignition coil 4, on cylinder head |
| P | Spark plug connector |
| Q | Spark plugs |
| T3 | 3-pin connector |
| T3a | 3-pin connector |
| T3b | 3-pin connector |
| T3c | 3-pin connector |
| T4a | 4-pin connector |
| T5 | 5-pin connector |
| T14a | 14-pin connector, near battery |
| 15 | Earth point, on cylinder head |
| 281 | Earth connection -1-, in engine prewiring wiring harness |
| A104 | Positive (+) connection -2- (15), in dash panel wiring harness |
| D52 | Positive (+) connection (15a), in engine compartment wiring harness |
| D | Ignition/starter switch |
| J220 | Motronic control unit, in plenum chamber, centre |
| N122 | Final output stage for ignition coils, in engine compartment rear |
| S10 | Fuse in fuse box |
| S229 | Fuse in fuse box |
| T5 | 5-pin connector |
| T6 | 6-pin connector, brown, in protective housing for connectors, in plenum chamber, left |
| T80 | 80-pin connector |
| 501 | Screw connection -2- (30), on relay plate |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A32 | Positive (+) connection (30), in dash panel wiring harness |
| A98 | Positive (+) connection-4-(30), in dash panel wiring harness |
| A104 | Positive (+) connection -2- (15), in dash panel wiring harness |
| F60 | Idling switch |
| G28 | Engine speed sender |
| G42 | Intake air temperature sender |
| G69 | Throttle valve potentiometer |
| G88 | Throttle valve positioner potentiometer |
| J220 | Motronic control unit, in plenum chamber, centre |
| J338 | Throttle valve control unit*** |
| T3f | 3-pin connector, in engine compartment, front |
| T8 | 8-pin connector |
| T10 | 10-pin connector, orange, in protective housing for connectors, in plenum chamber, left |
| T80 | 80-pin connector |
| V60 | Throttle valve positioner |
| *** | Models with cruise control system⇒ Current Flow Diagram cruise control system |
| F88 | Power assisted steering pressure switch |
| G61 | Knock sensor I |
| G66 | Knock sensor II |
| J217 | Automatic gearbox control unit |
| J220 | Motronic control unit, in plenum chamber, centre |
| T3d | 3-pin connector, in engine compartment rear |
| T3e | 3-pin connector, in engine compartment front |
| T10 | 10-pin connector, orange, in protective housing for connectors, in plenum chamber, left |
| T68 | 68-pin connector |
| T80 | 80-pin connector |
| 220 | Earth connection (sender earth), in engine wiring harness |
| --- | Only models with automatic gearbox |
| ** | Connection for air conditioner |
| J104 | ABS/ABS with EDL control unit |
| J217 | Automatic gearbox control unit |
| J220 | Motronic control unit, in plenum chamber, centre |
| T10w | 10-pin connector, white, in protective housing for connectors, in plenum chamber, left |
| T25 | 25-pin connector, on ABS/ABS with EDL control unit (up to July 2000) |
| T47a | 47-pin connector, ABS/ABS with EDL/TCS/ESP control unit (from August 2000) |
| T68 | 68-pin connector |
| T80 | 80-pin connector |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| 608 | Earth point, in plenum chamber, centre |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| * | Only models with manual gearbox |
| --- | Only models with automatic gearbox |
| F36 | Clutch pedal switch |
| G39 | Lambda probe |
| J17 | Fuel pump relay |
| J220 | Motronic control unit, in plenum chamber, centre |
| J234 | Airbag control unit, behind lower console |
| N75 | Charge pressure control solenoid valve |
| N80 | Activated charcoal filter system solenoid valve 1 |
| T4b | 4-pin connector, in protective housing in engine compartment, rear |
| T6 | 6-pin connector, brown, in control unit protective housing, in plenum chamber, left |
| T10 | 10-pin connector, orange, in protective housing for connectors, in plenum chamber, left |
| T10w | 10-pin connector, white, in protective housing for connectors, in plenum chamber, left |
| T14a | 14-pin connector, near battery |
| T75 | 75-pin connector |
| T80 | 80-pin connector |
| A27 | Connection (speed signal), in dash panel wiring harness |
| A100 | Connection -2- (87), in dash panel wiring harness |
| A125 | Connection (crash signal), in dash panel wiring harness |
| --••- | Up to April 2001 |
| G | Fuel gauge sender |
| G6 | Fuel pump |
| G32 | Coolant shortage indicator sender |
| S228 | Fuse in fuse box |
| S234 | Fuse in fuse box |
| S243 | Fuse in fuse box |
| T6 | 6-pin connector, brown, in control unit protective housing, in plenum chamber, left |
| T14a | 14-pin connector, near battery |
| 42 | Earth point, next to steering columm |
| 81 | Earth connection -1-, in dash panel wiring harness |
| 135 | Earth connection -2-, in dash panel wiring harness |
| 269 | Earth connection (sender earth) -1-, in dash panel wiring harness |
| 504 | Screw connection -1- (87F), on relay plate |
| A99 | Connection -1- (87), in dash panel wiring harness |
| A100 | Connection -2- (87), in dash panel wiring harness |
| E30 | Connection (87a), in engine wiring harness |
| * | Only models with multi-function display |
| -••- | Up to April 2000 |
| ** | From May 2000 |
| F1 | Oil pressure switch |
| G22 | Speedometer sender (Hall sender, on gearbox) |
| J285 | Control unit with display in dash panel insert |
| K3 | Oil pressure warning lamp |
| K28 | Coolant temperature/coolant shortage warning lamp |
| S7 | Fuse in fuse box |
| T14a | 14-pin connector, near battery |
| T32 | 32-pin connector, blue |
| T32a | 32-pin connector, green |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| 608 | Earth point, in plenum chamber, centre |
| B163 | Positive (+) connection -1- (15), in interior wiring harness |
| E86 | Multi-function display call-up button |
| E109 | Multi-function display, memory switch |
| G17 | Ambient temperature sensor |
| J119 | Multi-function display |
| J285 | Control unit with display in dash panel insert |
| J533 | Data bus diagnostic interface, in dash panel insert |
| K31 | Cruise control system warning lamp |
| K83 | Exhaust emissions warning lamp |
| T6e | 6-pin connector |
| T16 | 16-pin connector, in dash panel centre, self-diagnosis connection |
| T32 | 32-pin connector, blue |
| T32a | 32-pin connector, green |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| * | Only models with multi-function display |