| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| J518 | Entry and start authorisation control unit |
| J682 | Terminal 50 voltage supply relay |
| S1 | Fuse in relay plate fuse holder, in engine compartment |
| S3 | Fuse in relay plate fuse holder, in engine compartment |
| T6ma | 6-pin connector, white, on electronics box engine compartment |
| T10c | 10-pin connector, pink, electronics box engine compartment |
| T10d | 10-pin connector, blue, electronics box engine compartment |
| T10f | 10-pin connector, red, electronics box front engine compartment |
| T10ma | 10-pin connector, black, electronics box engine compartment |
| T81 | 81-pin connector, on entry and start authorisation control unit |
| TV2 | Terminal 30 wiring junction |
| TV22 | Terminal 30 wiring junction 2 |
| D144 | Positive connection 5 (30), in engine compartment wiring harness |
| * | from November 2003 |
| J255 | Climatronic control unit |
| S2 | Fuse in relay plate fuse holder, in engine compartment |
| S7 | Fuse in relay plate fuse holder, in engine compartment |
| S8 | Fuse in relay plate fuse holder, in engine compartment |
| S9 | Fuse in relay plate fuse holder, in engine compartment |
| S10 | Fuse in relay plate fuse holder, in engine compartment |
| S11 | Fuse in relay plate fuse holder, in engine compartment |
| S12 | Fuse in relay plate fuse holder, in engine compartment |
| S13 | Fuse in relay plate fuse holder, in engine compartment |
| S14 | Fuse in relay plate fuse holder, in engine compartment |
| S15 | Fuse in relay plate fuse holder, in engine compartment |
| S16 | Fuse in relay plate fuse holder, in engine compartment |
| S17 | Fuse in relay plate fuse holder, in engine compartment |
| S18 | Fuse in relay plate fuse holder, in engine compartment |
| T10d | 10-pin connector, blue, electronics box engine compartment |
| D75 | Positive connection 2 (30), in engine compartment wiring harness |
| D121 | Connection 19, in engine compartment wiring harness |
| D123 | Connection 21, in engine compartment wiring harness |
| E19 | Connection 4, in Motronic wiring harness |
| * | models with automatic gearbox only |
| ** | only models with manual gearbox |
| *** | from November 2003 |
| J220 | Motronic control unit |
| J271 | Motronic current supply relay |
| J670 | Motronic current supply relay 2 |
| N70 | Ignition coil 1 with output stage |
| N127 | Ignition coil 2 with output stage |
| N291 | Ignition coil 3 with output stage |
| P | Spark plug connector |
| Q | Spark plugs |
| T4aa | 4-pin connector, black |
| T4ab | 4-pin connector, black |
| T4ac | 4-pin connector, black |
| T6ma | 6-pin connector, white, electronics box engine compartment |
| T121a | 121-pin connector |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| 132 | Earth connection -3-, in engine compartment wiring harness |
| 209 | Earth connection -6-, in engine compartment wiring harness |
| 646 | Earth point 2, bulkhead |
| D50 | Positive connection (30), in engine compartment wiring harness |
| D75 | Positive connection 2 (30), in engine compartment wiring harness |
| D101 | Connection 1, in engine compartment wiring harness |
| D120 | Connection 18, in engine compartment wiring harness |
| D121 | Connection 19, in engine compartment wiring harness |
| D123 | Connection 21, in engine compartment wiring harness |
| D144 | Positive connection 5 (30), in engine compartment wiring harness |
| J17 | Fuel pump relay |
| J49 | Electric fuel pump 2 relay |
| J220 | Motronic control unit |
| J519 | Onboard supply control unit |
| N30 | Injector, cylinder 1 |
| N31 | Injector, cylinder 2 |
| N32 | Injector, cylinder 3 |
| N33 | Injector, cylinder 4 |
| N83 | Injector, cylinder 5 |
| N84 | Injector, cylinder 6 |
| T10c | 10-pin connector, pink, electronics box engine compartment |
| T18 | 18-pin connector |
| T121a | 121-pin connector |
| D50 | Positive connection (30), in engine compartment wiring harness |
| D101 | Connection 1, in engine compartment wiring harness |
| D107 | Connection 5, in engine compartment wiring harness |
| D124 | Connection 22, in engine compartment wiring harness |
| J220 | Motronic control unit |
| N292 | Ignition coil 4 with output stage |
| N323 | Ignition coil -5- with output stage |
| N324 | Ignition coil -6- with output stage |
| P | Spark plug connector |
| Q | Spark plugs |
| T4ad | 4-pin connector, black, on ignition coil 4 |
| T4ae | 4-pin connector, black, on ignition coil 5 |
| T4af | 4-pin connector, black, on ignition coil 6 |
| T6ma | 6-pin connector, white, electronics box engine compartment |
| T121a | 121-pin connector |
| 18 | Earth point, on engine block |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| 132 | Earth connection -3-, in engine compartment wiring harness |
| 209 | Earth connection -6-, in engine compartment wiring harness |
| D107 | Connection 5, in engine compartment wiring harness |
| J220 | Motronic control unit |
| N79 | Heater element for crankcase breather |
| N112 | Secondary air inlet valve |
| N156 | Variable intake manifold change-over valve |
| N205 | Inlet camshaft control valve 1 |
| N318 | Exhaust camshaft control valve 1 |
| SB50 | Fuse 50 on fuse holder |
| T6ma | 6-pin connector, white, electronics box engine compartment |
| T10f | 10-pin connector, red, electronics box engine compartment |
| T10ma | 10-pin connector, black, electronics box engine compartment |
| T121a | 121-pin connector |
| D52 | Positive connection (15a), in engine compartment wiring harness |
| D119 | Connection 17, in engine compartment wiring harness |
| E30 | Connection (87a), in engine wiring harness |
| F | Brake light switch |
| F36 | Clutch pedal switch |
| F47 | Brake pedal switch |
| G42 | Intake air temperature sender |
| G70 | Air mass meter |
| J104 | ABS control unit |
| J220 | Motronic control unit |
| SB26 | Fuse 26 on fuse holder |
| SB38 | Fuse 38 on fuse holder |
| T5a | 5-pin connector, brown, on air mass meter |
| T10c | 10-pin connector, pink, electronics box engine compartment |
| T10d | 10-pin connector, blue, electronics box engine compartment |
| T47b | 47-pin connector |
| T121a | 121-pin connector |
| B278 | Positive connection 2 (15a), in main wiring harness |
| B289 | Positive connection 13 (15a), in main wiring harness |
| B335 | Connection 1 (54), in main wiring harness |
| * | only models with manual gearbox |
| ** | from November 2003 |
| G65 | High pressure sender |
| J220 | Motronic control unit |
| J496 | Additional coolant pump relay |
| J569 | Brake servo relay |
| J671 | Radiator fan control unit 2 |
| N80 | Activated charcoal filter system solenoid valve 1 |
| N115 | Activated charcoal filter system solenoid valve 2 |
| T6ma | 6-pin connector, white, on electronics box engine compartment |
| T10e | 10-pin connector, green, electronics box engine compartment |
| T10ma | 10-pin connector, black, electronics box engine compartment |
| T121a | 121-pin connector |
| V144 | Fuel system diagnostic pump |
| V177 | Radiator fan 2 |
| 12 | Earth point, on left in engine compartment |
| E7 | Connection (87a), in Motronic wiring harness |
| E14 | Connection 1, in Motronic wiring harness |
| * | models with automatic gearbox only |
| ** | only models with manual gearbox |
| *** | only models with tank leak control |
| G79 | Accelerator position sender |
| G185 | Accelerator position sender 2 |
| J220 | Motronic control unit |
| J293 | Radiator fan control unit |
| J299 | Secondary air pump relay |
| J527 | Steering column electronics control unit |
| J708 | Residual heat relay |
| T6t | 6-pin connector |
| T6k | 6-pin connector, brown, electronics box engine compartment |
| T10d | 10-pin connector, blue, electronics box engine compartment |
| T10e | 10-pin connector, green, electronics box engine compartment |
| T10f | 10-pin connector, red, electronics box front engine compartment |
| T16a | 16-pin connector, steering column |
| T121a | 121-pin connector |
| V7 | Radiator fan |
| V36 | Water pump |
| V55 | Circulation pump |
| V101 | Secondary air pump motor |
| V192 | Vacuum pump for brakes |
| 12 | Earth point, on left in engine compartment |
| 614 | Earth point 2, on right in engine compartment |
| D118 | Connection 16, in engine compartment wiring harness |
| D122 | Connection 20, in engine compartment wiring harness |
| E7 | Connection (87a), in Motronic wiring harness |
| E53 | Connection 2 (87a), in Motronic wiring harness |
| * | only models without auxiliary coolant heater |
| ** | only models with auxiliary coolant heater |
| *** | models with automatic gearbox only |
| --- | from May 2003 |
| G83 | Radiator outlet coolant temperature sender |
| G186 | Throttle valve drive, electric throttle |
| G187 | Throttle valve drives angle sender 1, electric throttle |
| G188 | Throttle valve drives angle sender 2, electric throttle |
| J220 | Motronic control unit |
| J338 | Throttle valve module |
| T6mb | 6-pin connector, black |
| T10d | 10-pin connector, blue, electronics box engine compartment |
| T121a | 121-pin connector |
| 317 | Earth connection 7, in engine compartment wiring harness |
| 646 | Earth point 2, on bulkhead |
| B385 | Connection 3 (drive train CAN bus, high), in main wiring harness |
| B392 | Connection 3 (drive train CAN bus, low), in main wiring harness |
| B444 | Connection 1 (diagnosis), in main wiring harness |
| B509 | Connection 3 (diagnosis), in main wiring harness |
| * | from May 2003 |
| ** | is dropped from January 2003 |
| G | Fuel gauge sender |
| G6 | Fuel pump (pre-supply pump) |
| G23 | Fuel pump |
| G32 | Coolant shortage indicator sender |
| G237 | Fuel gauge sender 3 |
| J285 | Control unit with display in dash panel insert |
| J533 | Data bus diagnostic interface |
| T4af | 4-pin connector, near fuel tank |
| T5k | 5-pin connector, near fuel tank |
| T16b | 16-pin connector, self-diagnosis connection, driver footwell |
| T32a | 32-pin connector, blue |
| T32b | 32-pin connector, green |
| 39 | Earth point, under rear left seat |
| 269 | Earth connection (sender earth) 1, in dash panel wiring harness |
| B385 | Connection 3 (drive train CAN bus, high), in main wiring harness |
| B392 | Connection 3 (drive train CAN bus, low), in main wiring harness |
| B444 | Connection 1 (diagnosis), in main wiring harness |
| * | from May 2003 |
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