| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| F125 | Multi-function switch |
| J31 | Automatic intermittent wash/wipe relay |
| J207 | Starter inhibitor relay |
| T2 | 2-pin connector, grey, in engine compartment, right |
| T9 | 9-pin connector, brown, at starter inhibitor relay |
| T10c | 10-pin connector, grey, connector point, A pillar, left |
| T10o | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| T10p | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T15r | 15-pin connector, brown, connector point, right A pillar |
| 1 | Earth strap, battery - body |
| 44 | Earth point, lower part of left A-pillar |
| 81 | Earth connection -1-, in dash panel wiring harness |
| 199 | Earth connection -3-, in dash panel wiring harness |
| A17 | Connection (61), in dash panel wiring harness |
| A41 | Positive (+) connection (50), in dash panel wiring harness |
| * | Models with manual gearbox |
| ** | Models with automatic gearbox |
| J220 | Motronic control unit |
| N | Ignition coil |
| N30 | Injector, cylinder 1 |
| N31 | Injector, cylinder 2 |
| N32 | Injector, cylinder 3 |
| N33 | Injector, cylinder 4 |
| N83 | Injector, cylinder 5 |
| N84 | Injector, cylinder 6 |
| N122 | Final output stage |
| N128 | Ignition coil 2 |
| N158 | Ignition coil 3 |
| P | Spark plug connector |
| Q | Spark plugs |
| S234 | Fuse in fuse box |
| T3ba | 3-pin connector, black, on output stage 1 |
| T4af | 4-pin connector, black, on output stage 1 |
| T10n | 10-pin connector, orange, connector point, electronics box, plenum chamber |
| 18 | Earth point, on cylinder block |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| D14 | Connection (ignition coil - control unit), in front right wiring harness |
| D22 | Connection (via fuse 234), in front right wiring harness |
| D | Ignition/starter switch |
| G186 | Throttle valve drive (electric throttle operation) |
| G187 | Throttle valve drive angle sender -1- (electric throttle operation) |
| G187 | Throttle valve drive angle sender -2- (electric throttle operation) |
| J220 | Motronic control unit |
| J338 | Throttle valve control unit |
| N163 | Ignition coil 4 |
| N164 | Ignition coil 5 |
| N189 | Ignition coil 6 |
| N192 | Final output stage 2 |
| P | Spark plug connector |
| Q | Spark plugs |
| S232 | Fuse in fuse box |
| T3bb | 3-pin connector, brown, on output stage 2 |
| T4ag | 4-pin connector, brown, on output stage 2 |
| T10n | 10-pin connector, orange, connector point, electronics box, plenum chamber |
| 18 | Earth point, on cylinder block |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| D14 | Connection (ignition coil - control unit), in front right wiring harness |
| G2 | Coolant temperature sender |
| G28 | Engine speed sender |
| G42 | Intake air temperature sender |
| G61 | Knock sensor 1 |
| G62 | Coolant temperature sender |
| G66 | Knock sensor 2 |
| J220 | Motronic control unit |
| T3w | 3-pin connector, grey, on engine speed sender |
| T3ax | 3-pin connector, brown, at knock sensor 1 |
| T3ay | 3-pin connector, brown, at knock sensor 2 |
| T10p | 10-pin connector, black, connector point, electronics box, plenum chamber |
| 104 | Earth connection in front right wiring harness - sensor earth - |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| 220 | Earth connection (sender earth), in engine wiring harness |
| 269 | Earth connection (sender earth) -1-, in dash panel wiring harness |
| E87 | Control and display unit for air conditioner |
| G31 | Charge air pressure sender |
| G40 | Hall sender |
| G163 | Hall sender 2 |
| J104 | ABS with EDL control unit |
| J189 | Auto-check system |
| J217 | Automatic gearbox control unit |
| J220 | Motronic control unit |
| T10k | 10-pin connector, orange, connector point, A pillar, left |
| T10o | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| T10p | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T15r | 15-pin connector, brown, connector point, right A pillar |
| T15u | 15-pin connector, red, connector point, electronics box, plenum chamber |
| T20 | 20-pin connector, red/white, on dash panel insert |
| 220 | Earth connection (sender earth), in engine wiring harness |
| A45 | Connection (engine speed signal), in dash panel wiring harness |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| D141 | Connection (5V), in engine compartment wiring harness |
| • | CAN bus |
| * | Models with air conditioner |
| ** | Models with automatic gearbox 01V |
| *** | Models with traction control system CAN bus (data bus) |
| E87 | Control and display unit for air conditioner |
| G39 | Lambda probe |
| G108 | Lambda probe 2 |
| J17 | Fuel pump relay |
| J220 | Motronic control unit |
| N80 | Activated charcoal filter system solenoid valve 1 (pulsed) |
| S229 | Fuse in fuse box |
| T4u | 4-pin connector, black, for lambda probe 1 |
| T4v | 4-pin connector, black, for lambda probe 2 |
| T10n | 10-pin connector, orange, connector point, electronics box, plenum chamber |
| T10o | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| T10p | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T15u | 15-pin connector, red, connector point, electronics box, plenum chamber |
| Z19 | Lambda probe heater |
| Z28 | Lambda probe 2 heater |
| 200 | Earth connection (sender earth), in engine wiring harness |
| D23 | Connection (via fuse 229), in front right wiring harness |
| * | Models with air conditioner |
| E3 | Hazard warning light switch |
| G70 | Air mass meter |
| G235 | Exhaust gas temperature sender 1 |
| G236 | Exhaust gas temperature sender 2 |
| J220 | Motronic control unit |
| J234 | Airbag control unit |
| J429 | Central locking control unit |
| N8 | By-pass air cut-off valve (central idling) |
| N75 | Charge pressure control solenoid valve |
| N205 | Inlet camshaft timing adjustment valve -1- |
| N208 | Inlet camshaft timing adjustment valve -2- |
| T3au | 3-pin connector, red, connector point, electronics box, plenum chamber |
| T10av | 10-pin connector, yellow, connector point, A pillar, right |
| D8 | Connection (temperature sensor) in front right wiring harness |
| D23 | Connection (via fuse 229), in front right wiring harness |
| D101 | Connection -1-, in engine compartment wiring harness |
| E45 | Cruise control system switch |
| E87 | Control and display unit for air conditioner |
| F | Brake light switch |
| F36 | Clutch pedal switch |
| F47 | Cruise control system brake pedal switch (diesel direct injection system) |
| J220 | Motronic control unit |
| M9 | Brake light bulb, left |
| M10 | Brake light bulb, right |
| S7 | Fuse in fuse box |
| S13 | Fuse in fuse box |
| T10q | 10-pin connector, black, on cruise control system switch |
| T15e | 15-pin connector, white, connector point, electronics box, plenum chamber |
| T15u | 15-pin connector, red, connector point, electronics box, plenum chamber |
| A16 | Connection (cruise control system), in dash panel wiring harness |
| A18 | Connection (54), in dash panel wiring harness |
| A52 | Positive (+) connection 2 (30), in dash panel wiring harness |
| A68 | Connection (C15, air conditioner), in dash panel wiring harness |
| B131 | Connection (54), in interior wiring harness |
| J9 | Connection -1- (15a), in ABS wiring harness |
| * | Models with air conditioner |
| ** | Models with cruise control system |
| E87 | Control and display unit for air conditioner |
| G | Fuel gauge sender |
| G6 | Fuel pump (pre-supply pump) |
| G79 | Accelerator pedal position sender |
| G169 | Fuel gauge sender 2 |
| G185 | Accelerator pedal position sender -2- |
| G237 | Fuel gauge sender 3 |
| J220 | Motronic control unit |
| S225 | Fuse in fuse box |
| S228 | Fuse in fuse box |
| T6a | 6-pin connector, blue, connector point, A pillar, left |
| T6an | 6-pin connector, in footwell, front left |
| T10f | 10-pin connector, brown, connector point, A pillar, left |
| T10n | 10-pin connector, orange, connector point, electronics box, plenum chamber |
| T10o | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| T15e | 15-pin connector, white, connector point, electronics box, plenum chamber |
| 86 | Earth connection -1-, in rear wiring harness |
| 269 | Earth connection (sender earth) -1-, in dash panel wiring harness |
| A79 | Connection (hot light switch), in dash panel wiring harness |
| * | Models with front-wheel drive |
| ** | Models with four-wheel drive |
| *** | Wiring with fuel tank |
| **** | Models with air conditioner |
| E87 | Control and display unit for air conditioner |
| F18 | Radiator fan thermo-switch |
| F54 | Radiator fan thermo-switch |
| F95 | Thermo-switch for continued coolant circulation |
| F129 | Air conditioner pressure switch |
| J293 | Radiator fan control unit |
| S42 | Radiator fan single fuse |
| S142 | Radiator fan control unit fuse |
| S225 | Fuse 25 in fuse box |
| T2by | 2-pin connector, on radiator fan control unit |
| T6ao | 6-pin connector, on radiator fan control unit |
| T10c | 10-pin connector, grey, connector point, A pillar, left |
| T10n | 10-pin connector, orange, connector point, electronics box, plenum chamber |
| V7 | Radiator fan |
| V51 | Continued coolant circulation pump |
| 44 | Earth point, lower part of left A-pillar |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| 193 | Earth connection -1-, in coolant fan wiring harness |
| L4 | Connection (75 al), in air conditioner wiring harness |
| L39 | Connection (air conditioner pressure switch) -1-, in Climatronic wiring harness |
| * | Models with air conditioner |
| F1 | Oil pressure switch |
| F66 | Coolant shortage indicator switch |
| G1 | Fuel gauge |
| G3 | Coolant temperature gauge |
| G8 | Oil temperature sender |
| G21 | Speedometer |
| G22 | Speedometer sender (Hall sender, on gearbox) |
| J218 | Combi-processor in dash panel insert |
| K | Diagnosis connection |
| K2 | Alternator warning lamp |
| K3 | Oil pressure warning lamp |
| K28 | Coolant temperature/coolant shortage warning lamp |
| K132 | Electronic power control fault lamp |
| T2ai | 2-pin connector, black, oil senders |
| T10p | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T16a | 16-pin connector, diagnosis connection |
| T32 | 32-pin connector, blue, on dash panel insert |
| T32a | 32-pin connector, green, on dash panel insert |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| 135 | Earth connection -2-, in dash panel wiring harness |
| 199 | Earth connection -3-, in dash panel wiring harness |
| 269 | Earth connection (sender earth) -1-, in dash panel wiring harness |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| A108 | Connection (speed signal), in dash panel wiring harness |
| * | Both possible |
