| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| F18 | Radiator fan thermal switch |
| S162 | Fuse -1- (30), in fuse holder on the battery |
| S180 | Fuse -8- (30), in fuse holder on the battery |
| T1a | 1-pin connector, at starter |
| T2v | 2-pin connector, at alternator |
| T2w | 2-pin connector, in the holder on the gearbox |
| T3h | 3-pin connector, at radiator fan thermal switch |
| T3i | 3-pin connector, in the holder on the left radiator |
| T8a | 8-pin connector, at ignition/starter switch |
| T11b | 11-pin connector, at front wall, left (red) |
| T11c | 11-pin connector, at front wall, left (blue) |
| T18a | 18-pin connector, on the onboard power supply control unit (brown) |
| V7 | Radiator fan |
| 12a | Earth point -2-, on left in engine compartment, below the battery (at longitudinal member) |
| P1 | Positive connection (30), in fuse holder on the battery |
| Thermal switch and radiator fan depending upon optional equipment (not valid for vehicles with air conditioning system) |
| G28 | Engine speed sender |
| G62 | Coolant temperature sender |
| J623 | Engine control unit |
| N30 | Injector, cylinder 1 |
| N31 | Injector, cylinder 2 |
| N32 | Injector, cylinder 3 |
| N33 | Injector, cylinder 4 |
| T2a | 2-pin connector, at injector, cylinder 1 |
| T2b | 2-pin connector, at injector, cylinder 2 |
| T2c | 2-pin connector, at injector, cylinder 3 |
| T2d | 2-pin connector, at injector, cylinder 4 |
| T2y | 2-pin connector, at coolant temperature sender |
| T3m | 3-pin connector, at engine speed sender |
| T11e | 11-pin connector, at front wall, left (green) |
| T14a | 14-pin connector, on left in engine compartment (connection engine prewiring wiring harness/engine compartment wiring harness) |
| T28a | 28-pin connector, at engine control unit |
| T52a | 52-pin connector, at engine control unit |
| 220 | Earth connection (sender earth), in engine wiring harness |
| A121 | Connection (CAN H), in wiring harness behind dash panel |
| A122 | Connection (CAN L), in wiring harness behind dash panel |
| D140 | Connection (injectors), in engine wiring harness |
| D141 | Connection (5V), in engine wiring harness |
| D159 | Connection (CAN H), in engine compartment wiring harness |
| D160 | Connection (CAN L), in engine compartment wiring harness |
| G39 | Lambda probe |
| G42 | Intake air temperature sender |
| G71 | Intake manifold pressure sender |
| G130 | Lambda probe after catalytic converter |
| J623 | Engine control unit |
| N80 | Activated charcoal filter system solenoid valve |
| T2z | 2-pin connector, at activated charcoal filter system solenoid valve |
| T4f | 4-pin connector, at intake air temperature sender and intake manifold pressure |
| T4i | 4-pin connector, near lambda probe |
| T4k | 4-pin connector, near lambda probe after catalytic converter |
| T11b | 11-pin connector, at front wall, left (red) |
| T14a | 14-pin connector, on left in engine compartment (connection engine prewiring wiring harness/engine compartment wiring harness) |
| T28a | 28-pin connector, at engine control unit |
| T52a | 52-pin connector, at engine control unit |
| Z19 | Lambda probe heater |
| Z29 | Lambda probe heater after catalytic converter |
| 220 | Earth connection (sender earth), in engine wiring harness |
| A130 | Connection (CCS), in wiring harness behind dash panel, left |
| D141 | Connection (5V), in engine wiring harness |
| E28 | Connection (lambda probe heating), in engine compartment wiring harness |
| only on vehicles with CCS |
| F | Brake light switch |
| F36 | Clutch pedal switch |
| F47 | Brake pedal switch |
| G79 | Accelerator pedal position sender |
| G185 | Accelerator pedal position sender -2- |
| J623 | Engine control unit |
| SB2 | Fuse, in fuse holder |
| T4d | 4-pin connector, at brake pedal switch |
| T4h | 4-pin connector, at clutch pedal switch |
| T6u | 6-pin connector, at accelerator pedal position sender |
| T11c | 11-pin connector, at front wall, left (blue) |
| T52a | 52-pin connector, at engine control unit |
| A18 | Connection (54), in wiring harness behind dash panel |
| A100 | Connection (87a), in wiring harness behind dash panel |
| D73 | Connection (54), in engine compartment wiring harness, right |
| D101 | Connection (brake pedal switch), in engine compartment wiring harness |
| G40 | Camshaft position sender |
| G61 | Knock sensor I |
| J623 | Engine control unit |
| T2e | 2-pin connector, at knock sensor I |
| T3j | 3-pin connector, at camshaft position sender |
| T9a | 9-pin connector, at front wall, left (yellow) |
| T11b | 11-pin connector, at front wall, left (red) |
| T14a | 14-pin connector, on left in engine compartment (connection engine prewiring wiring harness/engine compartment wiring harness) |
| T28a | 28-pin connector, at engine control unit |
| T52a | 52-pin connector, at engine control unit |
| 29 | Earth point, on left in engine compartment, behind the battery (on suspension strut mount) |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| 220 | Earth connection (sender earth), in engine wiring harness |
| 281 | Earth connection -1-, in engine wiring harness |
| A76 | Connection (diagnosis wire K), in wiring harness behind dash panel, left |
| D174 | Connection -2- (5V), in engine wiring harness |
| ** | not valid for vehicles with ABS/ ABS with TCS/ ABS with EDL and TCS/ESP |
| 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) |
| J338 | Throttle valve control unit |
| J437 | Electric drive main relay |
| J623 | Engine control unit |
| N79 | Heating resistor for crankcase ventilation |
| T2m | 2-pin connector, at heating resistor for crankcase ventilation |
| T6t | 6-pin connector, on the throttle valve control unit |
| T11b | 11-pin connector, at front wall, left (red) |
| T28a | 28-pin connector, at engine control unit |
| T52a | 52-pin connector, at engine control unit |
| A32 | Positive connection (30a), in wiring harness behind dash panel |
| D174 | Connection -2- (5V), in engine wiring harness |
| G266 | Oil level/oil temperature sender |
| J623 | Engine 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 |
| Q | Spark plug |
| T3f | 3-pin connector, at oil level/oil temperature sender |
| T4a | 4-pin connector, at the ignition coil 1 |
| T4b | 4-pin connector, at the ignition coil 2 |
| T4c | 4-pin connector, at ignition coil 3 |
| T4d | 4-pin connector, at the ignition coil 4 |
| T14a | 14-pin connector, on left in engine compartment (connection engine prewiring wiring harness/engine compartment wiring harness) |
| T28a | 28-pin connector, at engine control unit |
| 19 | Earth point, near coil |
| 281 | Earth connection -1-, in engine wiring harness |
| 304 | Earth connection (ignition coils), in engine harness |
| D107 | Connection -5- (oil level/oil temperature sender), on left in engine compartment wiring harness |
| F36 | Connection (87a), in engine wiring harness |
| * | only on vehicles with extended servicing intervals (ESI) |
| T6w | 6-pin connector, at front wall, left (grey) |
| T9a | 9-pin connector, at front wall, left (yellow) |
| T11b | 11-pin connector, at front wall, left (red) |
| T11c | 11-pin connector, at front wall, left (blue) |
| T14a | 14-pin connector, on left in engine compartment (connection engine prewiring wiring harness/engine compartment wiring harness) |
| A2 | Positive connection (15), in wiring harness behind dash panel |
| A15 | Positive connection (15), in wiring harness behind dash panel |
| A98 | Positive connection (30a), in wiring harness behind dash panel |
| A99 | Connection (87), in wiring harness behind dash panel |
| A101 | Connection (87), in wiring harness behind dash panel |
| A139 | Positive connection (15), in wiring harness behind dash panel |
| D25 | Connection (15a), in engine wiring harness |
| D52 | Positive connection (15a), in engine compartment wiring harness |
| D106 | Connection -4- (87a), on left in engine compartment wiring harness |
| * | only on vehicles with extended servicing intervals (ESI) |
| J17 | Fuel pump relay |
| J643 | Fuel supply relay |
| T11b | 11-pin connector, at front wall, left (red) |
| T16a | 16-pin connector, on the onboard power supply control unit (black) |
| A32 | Positive connection (30a), in wiring harness behind dash panel |
| A56 | Positive connection (30a), in wiring harness behind dash panel |
| A98 | Positive connection (30a), in wiring harness behind dash panel |
| A99 | Connection (87), in wiring harness behind dash panel |
| A139 | Positive connection (15), in wiring harness behind dash panel |
| F1 | Oil pressure switch |
| G | Fuel gauge sender |
| G1 | Fuel gauge |
| G6 | Fuel pump |
| G21 | Speedometer |
| G22 | Speedometer sender |
| J285 | Control unit in dash panel insert |
| K | Dash panel insert |
| K3 | Oil pressure warning lamp |
| K38 | Oil level warning lamp |
| K83 | Exhaust emissions warning lamp |
| K105 | Reserve fuel warning lamp |
| K132 | Electronic power control fault lamp |
| T1b | 1-pin connector, at oil pressure switch |
| T3l | 3-pin connector, at speedometer sender |
| T4j | 4-pin connector, on the fuel pump |
| T6w | 6-pin connector, at front wall, left (grey) |
| T9a | 9-pin connector, at front wall, left (yellow) |
| T11d | 11-pin connector, at front wall, left (brown) |
| T14a | 14-pin connector, on left in engine compartment (connection engine prewiring wiring harness/engine compartment wiring harness) |
| T32a | 32-pin connector, at dash panel insert |
| Y4 | Odometer display |
| 199 | Earth connection, in wiring harness behind dash panel |
| 269 | Earth connection (sender earth) -1-, in wiring harness behind dash panel |
| A27 | Connection (speed signal), in wiring harness behind dash panel |
| A139 | Positive connection (15), in wiring harness behind dash panel |
| * | only on vehicles with extended servicing intervals (ESI) |
| ** | not valid for vehicles with ABS/ ABS with TCS/ ABS with EDL and TCS/ESP |
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