| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| J59 | X contact relief relay |
| S11 | Fuse in fuse box/relay plate |
| S163 | Fuse -2- (30), in fuse box/battery |
| S176 | Fuse -4- (30), in fuse box/battery |
| S177 | Fuse -5- (30), in fuse box/battery |
| S229 | Fuse in fuse box |
| S237 | Fuse in fuse box |
| 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 |
| A98 | Positive (+) connection -4- (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 protective housing for connectors, on left in plenum chamber |
| T14a | 14-pin connector, in cable channel left |
| 16 | Earth point, on cylinder head cover |
| 132 | Earth connection -3-, in engine compartment wiring harness |
| 281 | Earth connection -1-, in engine prewiring wiring harness |
| A98 | Positive (+) connection -4- (30), in dash panel 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 |
| G40 | Hall sender |
| G42 | Intake air temperature sender |
| G62 | Coolant temperature sender |
| G71 | Intake manifold pressure sender |
| J220 | Motronic control unit |
| J255 | Climatronic control unit |
| J293 | Radiator fan control unit |
| T10 | 10-pin connector, orange, in protective housing for connectors, on left in plenum chamber |
| T14a | 14-pin connector, in cable channel left |
| 220 | Earth connection (sender earth), in engine wiring harness |
| D101 | Connection -1-, in engine compartment wiring harness |
| G28 | Engine speed sender |
| G186 | Throttle valve drive (electric throttle operation) |
| G187 | Throttle valve drive angle sender -1- (electric throttle operation) |
| G188 | Throttle valve drive angle sender -2- (electric throttle operation) |
| J104 | ABS with EDL control unit |
| J220 | Motronic control unit |
| J338 | Throttle valve control unit |
| N121 | Exhaust gas recirculation frequency valve |
| T3d | 3-pin connector, near intake manifold |
| T10d | 10-pin connector, green, in protective housing for connectors, on left in plenum chamber |
| D101 | Connection -1-, in engine compartment wiring harness |
| F | Brake light switch |
| G39 | Lambda probe |
| G61 | Knock sensor I |
| J220 | Motronic control unit |
| Z19 | Lambda probe heater |
| T2r | 2-pin connector, on cylinder head, left |
| T6q | 6-pin connector, on exhaust pipe |
| 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 |
| 10 | Earth point, in plenum chamber |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| D102 | Connection -2-, in engine compartment wiring harness |
| W1 | Positive (+) connection -1- (54), in rear wiring harness |
| F36 | Clutch pedal switch |
| G130 | Lambda probe after catalyst |
| J17 | Fuel pump relay |
| J220 | Motronic control unit |
| J234 | Airbag control unit |
| N80 | Activated charcoal filter system solenoid valve 1 (pulsed) |
| S5 | Fuse in fuse box/relay plate |
| Z29 | Lambda probe 1 heater, downstream of catalytic converter |
| T4p | 4-pin connector, centre in engine compartment |
| T6l | 6-pin connector, brown, in protective housing for connectors, on left in plenum chamber |
| 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 |
| A20 | Positive (+) connection (15a), in dash panel wiring harness |
| A125 | Connection (crash signal), in dash panel wiring harness |
| E30 | Connection (87a), in engine wiring harness |
| * | Only models with multi-function display |
| ** | Wire W for self-diagnosis |
| G | Fuel gauge sender |
| G6 | Fuel pump (pre-supply pump) |
| G32 | Coolant shortage indicator sender |
| N63 | Fresh and recirculating air flap two-way valve |
| T6l | 6-pin connector, brown, in protective housing for connectors, on left in plenum chamber |
| T14a | 14-pin connector, in cable channel left |
| 10 | Earth point, in plenum chamber |
| 33 | Earth point, on right behind dash panel |
| 81 | Earth connection -1-, in dash panel wiring harness |
| 85 | Earth connection -1-, in engine compartment 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 |
| F1 | Oil pressure switch |
| F4 | Reversing light 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 |
| T10 | 10-pin connector, orange, in protective housing for connectors, on left in plenum chamber |
| T14a | 14-pin connector, in cable channel left |
| B163 | Positive (+) connection -1- (15), in interior wiring harness |
| D51 | Positive (+) connection -1- (15), in engine compartment wiring harness |
| * | Wire W for self-diagnosis |
| 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 |
| J255 | Climatronic control unit |
| J285 | Control unit with display in dash panel insert |
| K105 | Reserve fuel warning lamp |
| T6d | 6-pin connector |
| T12d | 12-pin connector, on Climatronic |
| A13 | Connection (door contact switch), in dash panel wiring harness |
| A27 | Connection (speed signal), in dash panel wiring harness |
| * | Only models with multi-function display |