| 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 |
| S162 | Fuse -1- (30), in battery fuse box |
| S163 | Fuse -2- (30), in battery fuse box |
| S176 | Fuse -4- (30), in battery fuse box |
| S177 | Fuse -5- (30), in battery fuse box |
| T4g | 4-pin connector, in engine compartment, near alternator |
| T6 | 6-pin connector, brown, connector point, electronics box, 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 |
| Only models with manual gearbox |
| Only models with automatic gearbox |
| D | Ignition/starter switch |
| J220 | Motronic control unit |
| N70 | Ignition coil 1 with output stage |
| N127 | Ignition coil 2 with output stage |
| P | Spark plug connector |
| Q | Spark plugs |
| S10 | Fuse in fuse box/relay plate |
| S229 | Fuse in fuse box |
| T6 | 6-pin connector, brown, connector point, electronics box, in plenum chamber, left |
| T14 | 14-pin connector, in engine compartment |
| T121 | 121-pin connector |
| 135 | Earth connection -2-, in dash panel wiring harness |
| 281 | Earth connection -1-, in engine pre-wiring harness |
| 283 | Earth connection -2-, in engine pre-wiring harness |
| 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 |
| A40 | Positive (+) connection -1- (30), in dash panel wiring harness |
| A104 | Positive (+) connection -2- (15), in dash panel wiring harness |
| D106 | Connection -4-, in engine compartment wiring harness |
| G79 | Accelerator pedal position sender |
| G185 | Accelerator pedal position sender -2- |
| J220 | Motronic control unit |
| N291 | Ignition coil 3 with output stage |
| N292 | Ignition coil 4 with output stage |
| N323 | Ignition coil 5 with output stage |
| P | Spark plug connector |
| Q | Spark plugs |
| T6i | 6-pin connector, on accelerator pedal position sender |
| T10h | 10-pin connector, blue, connector point, electronics box, in plenum chamber, left |
| T121 | 121-pin connector |
| 18 | Earth point, on cylinder block |
| 281 | Earth connection -1-, in engine pre-wiring harness |
| 283 | Earth connection -2-, in engine pre-wiring harness |
| 608 | Earth point, in plenum chamber, centre |
| D106 | Connection -4-, in engine compartment wiring harness |
| G2 | Coolant temperature sender |
| G40 | Hall sender |
| G62 | Coolant temperature sender |
| G163 | Hall sender 2 |
| J220 | Motronic control unit |
| N79 | Heater element (crankcase breather) |
| N156 | Intake manifold change-over valve |
| N205 | Inlet camshaft timing adjustment valve -1- |
| N208 | Inlet camshaft timing adjustment valve -2- |
| T14 | 14-pin connector, in engine compartment |
| T121 | 121-pin connector, on Motronic control unit |
| 220 | Earth connection (sender earth), in engine wiring harness |
| 281 | Earth connection -1-, in engine prewiring wiring harness |
| D102 | Connection -2-, in engine compartment wiring harness |
| D107 | Connection -5-, in engine compartment wiring harness |
| G61 | Knock sensor I |
| G66 | Knock sensor II |
| G69 | Throttle valve potentiometer |
| G88 | Throttle valve positioner potentiometer |
| J220 | Motronic control unit |
| J338 | Throttle valve control unit |
| T2a | 2-pin connector, on engine front |
| T3a | 3-pin connector, on engine front |
| T121 | 121-pin connector, on Motronic control unit |
| V60 | Throttle valve positioner |
| 139 | Earth connection (sender earth), in Motronic wiring harness |
| 220 | Earth connection (sender earth), in engine wiring harness |
| G28 | Engine speed sender |
| J220 | Motronic control unit |
| J293 | Radiator fan control unit |
| T3b | 3-pin connector, on engine front |
| T10 | 10-pin connector, orange, connector point, electronics box, in plenum chamber, left |
| T121 | 121-pin connector |
| 132 | Earth connection -3-, in engine compartment wiring harness |
| 220 | Earth connection (sender earth), in engine wiring harness |
| 608 | Earth point, in plenum chamber, centre |
| L9 | Connection -1-, in air conditioner wiring harness |
| * | Compressor switch-off |
| ** | Air conditioner 'ready' connection |
| J220 | Motronic control unit |
| N30 | Injector, cylinder 1 |
| N31 | Injector, cylinder 2 |
| N32 | Injector, cylinder 3 |
| N33 | Injector, cylinder 4 |
| N83 | Injector, cylinder 5 |
| S232 | Fuse in fuse box |
| T10d | 10-pin connector, white, connector point, electronics box, in plenum chamber, left |
| T14 | 14-pin connector, in engine compartment |
| T121 | 121-pin connector |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| A151 | Connection -4- (87), in dash panel wiring harness |
| D95 | Connection (injectors), in engine compartment wiring harness |
| E45 | Cruise control system switch |
| E227 | Cruise control system (CCS) button (Set) |
| J220 | Motronic control unit |
| J293 | Radiator fan control unit |
| T2b | 2-pin connector, in engine compartment |
| T10e | 10-pin connector, black, connector point, electronics box, in plenum chamber, left |
| T10s | 10-pin connector, next to steering column |
| T14b | 14-pin connector, on radiator fan control unit |
| T121 | 121-pin connector, on Motronic control unit |
| V51 | Continued coolant circulation pump |
| 12 | Earth point, in engine compartment, left |
| 193 | Earth connection -1-, in coolant fan wiring harness |
| A20 | Connection (15a), in dash panel wiring harness |
| * | Only models with cruise control system |
| F | Brake light switch |
| F36 | Clutch pedal switch |
| F47 | Cruise control system brake pedal switch (diesel direct injection system) |
| J220 | Motronic control unit |
| J299 | Secondary air pump relay |
| M9 | Brake light bulb, left |
| M10 | Brake light bulb, right |
| M25 | High level brake light bulb |
| N112 | Secondary air inlet valve |
| S13 | Fuse in fuse box/relay plate |
| T10d | 10-pin connector, white, connector point, electronics box, in plenum chamber, left |
| T10e | 10-pin connector, black, connector point, electronics box, in plenum chamber, left |
| T121 | 121-pin connector |
| V101 | Secondary air pump motor |
| 609 | Earth point, in plenum chamber, right |
| A18 | Connection (54), in dash panel wiring harness |
| A20 | Connection (15a), in dash panel wiring harness |
| D101 | Connection -1-, in engine compartment wiring harness |
| E30 | Connection (87a), in engine wiring harness |
| * | Models without cruise control system (CCS) |
| ** | Only models with cruise control system (CCS) |
| Only models with automatic gearbox |
| Only models with manual gearbox |
| G39 | Lambda probe |
| G70 | Air mass meter |
| G130 | Lambda probe downstream of catalytic converter |
| J17 | Fuel pump relay |
| J220 | Motronic control unit |
| J234 | Airbag control unit |
| N80 | Activated charcoal filter system solenoid valve 1 (pulsed) |
| T4d | 4-pin connector, vehicle underside, next to the catalytic converter left |
| T6 | 6-pin connector, brown, connector point, electronics box, in plenum chamber, left |
| T6f | 6-pin connector, vehicle underside, next to the catalytic converter left |
| T10 | 10-pin connector, orange, connector point, electronics box, in plenum chamber, left |
| T75 | 75-pin connector |
| T121 | 121-pin connector |
| Z19 | Lambda probe heater |
| Z29 | Lambda probe 1 heater, downstream of catalytic converter |
| A27 | Connection (speed signal), in dash panel wiring harness |
| A125 | Connection (crash signal), in dash panel wiring harness |
| D103 | Connection -3-, in engine compartment wiring harness |
| E30 | Connection (87a), in engine wiring harness |
| G | Fuel gauge sender |
| G6 | Fuel pump (pre-supply 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, connector point, electronics box, in plenum chamber, left |
| T14 | 14-pin connector, in engine compartment |
| 42 | Earth point, next to steering column |
| 49 | Earth point, on steering column |
| 81 | Earth connection -1-, in dash panel wiring harness |
| 269 | Earth connection (sender earth) -1-, in dash panel wiring harness |
| 504 | Screw connection -1- (87), on relay plate |
| A99 | Connection -1- (87), in dash panel wiring harness |
| B147 | Positive (+) connection -2- (87), in interior wiring harness |
| E30 | Connection (87a), in engine wiring harness |
| F1 | Oil pressure switch |
| G22 | Speedometer sender (hall sender, on gearbox) |
| H3 | Buzzer/gong |
| J285 | Control unit with display in dash panel insert |
| K2 | Alternator warning lamp |
| K3 | Oil pressure warning lamp |
| K28 | Coolant temperature/coolant shortage warning lamp |
| K105 | Reserve fuel warning lamp |
| S5 | Fuse in fuse box/relay plate |
| S7 | Fuse in fuse box/relay plate |
| T14 | 14-pin connector, in engine compartment |
| T32 | 32-pin connector, blue, on dash panel insert |
| A13 | Connection (door contact switch), in dash panel wiring harness |
| A38 | Positive (+) connection -2- (15a), in dash panel wiring harness |
| * | Sender earth output |
| G1 | Fuel gauge |
| G3 | Coolant temperature gauge |
| G5 | Rev. counter |
| G21 | Speedometer |
| G266 | Oil level/oil temperature sender |
| J285 | Control unit with display in dash panel insert |
| J533 | Data bus diagnostic interface |
| T14 | 14-pin connector, in engine compartment |
| T16 | 16-pin connector, diagnostic connector |
| T32 | 32-pin connector, blue, on dash panel insert |
| T32a | 32-pin connector, green, on dash panel insert |
| A27 | Connection (speed signal), in dash panel wiring harness |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| * | Only models with maintenance intermittent extension, from 2002 model year |
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