| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| T1a | 1-pin connector, at starter |
| T1c | 1-pin connector, for starter, in the holder on the gearbox |
| T2x | 2-pin connector, at alternator |
| T8a | 8-pin connector, at ignition/starter switch |
| T10g | 10-pin connector, in plenum chamber (black) |
| T10k | 10-pin connector, in plenum chamber (brown) |
| 1 | Earth strap, battery body |
| 3 | Earth strap, engine - body |
| 13 | Earth point, on right in engine compartment |
| * | not valid for vehicles with automatic gearbox |
| D | Ignition/starter switch |
| J17 | Fuel pump relay |
| J220 | Motronic control unit |
| N30 | Injector, cylinder 1 |
| N31 | Injector, cylinder 2 |
| N32 | Injector, cylinder 3 |
| N33 | Injector, cylinder 4 |
| T2t | 2-pin connector, at injector, cylinder 1 |
| T2u | 2-pin connector, at injector, cylinder 2 |
| T2v | 2-pin connector, at injector, cylinder 3 |
| T2w | 2-pin connector, at injector, cylinder 4 |
| T10g | 10-pin connector, in plenum chamber (black) |
| T10m | 10-pin connector, in plenum chamber (orange) |
| T40a | 40-pin connector, at engine control unit |
| T81a | 81-pin connector, at engine control unit |
| 28 | Earth point, at the front wall, left |
| 85 | Earth connection, in engine compartment wiring harness |
| A2 | Positive connection (15), in dash panel wiring harness |
| A99 | Connection -1- (87a), in dash panel wiring harness |
| D95 | Connection (injectors) in engine compartment wiring harness |
| G294 | Brake servo pressure sensor |
| J220 | Motronic control unit |
| J569 | Brake servo relay |
| S283 | Brake vacuum pump fuse, at additional relay holder above the relay holder |
| T2z | 2-pin connector, at the brake vacuum pump |
| T3d | 3-pin connector, in plenum chamber (red) |
| T4v | 4-pin connector, at brake servo pressure sensor |
| T15b | 15-pin connector, in plenum chamber (red) |
| T81a | 81-pin connector, at engine control unit |
| V192 | Vacuum pump for brakes |
| 85 | Earth connection, in engine compartment wiring harness |
| 220 | Earth connection (sender earth), in engine wiring harness |
| A2 | Positive connection (15), in dash panel wiring harness |
| A52 | Positive connection -2- (30), in dash panel wiring harness |
| only on vehicles with automatic gearbox |
| G28 | Engine speed sender |
| G40 | Hall sender |
| G71 | Intake manifold pressure sender |
| J220 | Motronic control unit |
| T3e | 3-pin connector, at Hall sender |
| T3j | 3-pin connector, at engine speed sender (grey), at the front wall, left |
| T4x | 4-pin connector, at intake manifold pressure sender |
| T40a | 40-pin connector, at engine control unit |
| 220 | Earth connection (sender earth), in engine wiring harness |
| D101 | Connection -1- (5V), in engine compartment wiring harness |
| only on vehicles with automatic gearbox |
| G42 | Intake air temperature sender |
| G61 | Knock sensor I |
| G66 | Knock sensor II |
| J220 | Motronic control unit |
| T2y | 2-pin connector, at intake air temperature sender |
| T3g | 3-pin connector, at knock sensor I (green), at the front wall, left |
| T3h | 3-pin connector, at knock sensor Il (blue), at the front wall, left |
| T40a | 40-pin connector, at engine control unit |
| 220 | Earth connection (sender earth), in engine wiring harness |
| D103 | Connection -3- (knock sensor), in engine compartment wiring harness |
| F | Brake light switch |
| F36 | Clutch pedal switch |
| F47 | Brake pedal switch |
| J104 | ABS control unit with EDL and TCS/ESP |
| J220 | Motronic control unit |
| SB7 | Fuse, in fuse holder |
| SB13 | Fuse, in fuse holder |
| T4b | 4-pin connector, at brake pedal switch |
| T4t | 4-pin connector, at clutch pedal switch |
| T10m | 10-pin connector, in plenum chamber (orange) |
| T15a | 15-pin connector, in plenum chamber (white) |
| T15b | 15-pin connector, in plenum chamber (red) |
| T42a | 42-pin connector, at ABL control unit with EDS and TCS/ESP |
| T81a | 81-pin connector, at engine control unit |
| A18 | Connection (54), in dash panel wiring harness |
| A38 | Positive connection -2- (15a), in dash panel wiring harness |
| A121 | Connection (CAN H), in dash panel wiring harness |
| A122 | Connection (CAN L), in dash panel wiring harness |
| A154 | Connection (brake pedal switch), in dash panel wiring harness |
| * | only on vehicles with ESP |
| ** | not valid for vehicles with automatic gearbox |
| G79 | Accelerator pedal position sender |
| G185 | Accelerator pedal position sender -2- |
| G186 | Throttle valve drive |
| G187 | Throttle valve drive angle sender -1- |
| G188 | Throttle valve drive angle sender -2- |
| J220 | Motronic control unit |
| J255 | Climatronic control unit |
| J314 | Air conditioning system control unit |
| J338 | Throttle valve control unit |
| T6j | 6-pin connector, on the throttle valve control unit |
| T6l | 6-pin connector, at accelerator pedal position sender |
| T10g | 10-pin connector, in plenum chamber (black) |
| T15a | 15-pin connector, in plenum chamber (white) |
| T15b | 15-pin connector, in plenum chamber (red) |
| T16e | 16-pin connector, at climatronic control unit (brown) |
| T40a | 40-pin connector, at engine control unit |
| T81a | 81-pin connector, at engine control unit |
| * | only on vehicles with air conditioning system |
| ** | only on vehicles with Climatronic |
| 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 plug |
| T4d | 4-pin connector, at ignition coil 1 |
| T4e | 4-pin connector, at ignition coil 2 |
| T4f | 4-pin connector, at ignition coil 3 |
| T4g | 4-pin connector, at ignition coil 4 |
| T10m | 10-pin connector, in plenum chamber (orange) |
| T40a | 40-pin connector, at engine control unit |
| 16 | Earth point -1-, on cylinder head cover |
| 85 | Earth connection, in engine compartment wiring harness |
| D102 | Connection -2- (87a, ignition coil), in engine compartment wiring harness |
| J104 | ABS with EDL control unit |
| J220 | Motronic control unit |
| J271 | Motronic current supply relay |
| N205 | Camshaft timing adjustment valve -1- |
| S131 | Fuse 1, at relay holder in plenum chamber |
| T2b | 2-pin connector, at camshaft timing adjustment valve -1- |
| T3l | 3-pin connector, in plenum chamber (white) |
| T10g | 10-pin connector, in plenum chamber (black) |
| T10o | 10-pin connector, on left A-pillar (orange) |
| T15b | 15-pin connector, in plenum chamber (red) |
| T26a | 26-pin connector, on ABS control unit with EDL |
| T40a | 40-pin connector, at engine control unit |
| T81a | 81-pin connector, at engine control unit |
| D50 | Positive connection (30), in engine compartment wiring harness |
| E32 | Connection (87), in engine wiring harness |
| * | only on vehicles with ABS with EDL |
| E45 | Cruise control system switch |
| E227 | Cruise control system (CCS) button (Set) |
| J220 | Motronic control unit |
| T10n | 10-pin connector, at CCS switch |
| T15a | 15-pin connector, in plenum chamber (white) |
| T81a | 81-pin connector, at engine control unit |
| A38 | Positive connection -2- (15a), in dash panel wiring harness |
| A130 | Connection (cruise control), in dash panel wiring harness |
| only on vehicles with CCS |
| J220 | Motronic control unit |
| J299 | Secondary air pump relay |
| N112 | Secondary air inlet valve |
| S130 | Secondary air pump fuse, at relay holder in plenum chamber |
| T2e | 2-pin connector, at secondary air pump motor |
| T2f | 2-pin connector, at secondary air inlet valve |
| T3l | 3-pin connector, in plenum chamber (white) |
| T10m | 10-pin connector, in plenum chamber (orange) |
| T81a | 81-pin connector, at engine control unit |
| V101 | Secondary air pump motor |
| 28 | Earth point, at the front wall, left |
| A52 | Positive connection -2- (30), in dash panel wiring harness |
| E30 | Connection (87a), in engine wiring harness |
| G39 | Lambda probe |
| G130 | Lambda probe after catalytic converter |
| J220 | Motronic control unit |
| T4j | 4-pin connector, at the lambda probe after catalytic converter (brown), at the front wall, left |
| T6k | 6-pin connector, at the lambda probe (black), at the front wall, left |
| T81a | 81-pin connector, at engine control unit |
| 221 | Earth connection (screening), in engine wiring harness |
| E30 | Connection (87a), in engine wiring harness |
| G70 | Air mass meter |
| J220 | Motronic control unit |
| N75 | Charge pressure control solenoid valve |
| N80 | Activated charcoal filter system solenoid valve |
| N249 | Turbocharger divert air valve |
| T2a | 2-pin connector, at activated charcoal filter system solenoid valve |
| T2d | 2-pin connector, at turbocharger divert air valve |
| T2z | 2-pin connector, at charge pressure control solenoid valve |
| T5d | 5-pin connector, at air mass meter |
| T10k | 10-pin connector, in plenum chamber (brown) |
| T40a | 40-pin connector, at engine control unit |
| T81a | 81-pin connector, at engine control unit |
| 221 | Earth connection (screening), in engine wiring harness |
| A27 | Connection (speed signal), in dash panel wiring harness |
| E30 | Connection (87a), in engine wiring harness |
| G | Fuel gauge sender |
| G1 | Fuel gauge |
| G2 | Coolant temperature gauge sender |
| G3 | Coolant temperature gauge |
| G5 | Rev. Counter |
| G6 | Fuel pump |
| G62 | Coolant temperature sender |
| J285 | Control unit in dash panel insert |
| K | Dash panel insert |
| K16 | Reserve fuel warning lamp |
| K28 | Coolant temperature and coolant shortage indicator warning lamp |
| T4h | 4-pin connector, at coolant temperature sender |
| T4l | 4-pin connector, on the fuel pump |
| T6e | 6-pin connector, on left A-pillar (blue) |
| T10e | 10-pin connector, on left A-pillar (brown) |
| T10g | 10-pin connector, in plenum chamber (black) |
| T32a | 32-pin connector, at dash panel insert (blue) |
| T32b | 32-pin connector, at dash panel insert (green) |
| 87 | Earth connection -2-, in rear wiring harness |
| 220 | Earth connection (sender earth), in engine wiring harness |
| 269 | Earth connection (sender earth) -1-, in dash panel wiring harness |
| 316 | Earth connection (sender earth) -2-, in engine wiring harness |
| A27 | Connection (speed signal), in dash panel wiring harness |
| F1 | Oil pressure switch |
| G21 | Speedometer |
| G22 | Speedometer sender (on gearbox) |
| G266 | Oil level/oil temperature sender |
| J285 | Control unit in dash panel insert |
| K | Dash panel insert |
| K2 | Alternator warning lamp |
| K3 | Oil pressure warning lamp |
| K38 | Oil level warning lamp |
| K83 | Exhaust emissions warning lamp |
| K132 | Electronic power control fault lamp |
| SB5 | Fuse, in fuse holder |
| T1b | 1-pin connector, at oil pressure switch |
| T3f | 3-pin connector, at speedometer sender |
| T3k | 3-pin connector, at oil level/oil temperature sender |
| T10g | 10-pin connector, in plenum chamber (black) |
| T10k | 10-pin connector, in plenum chamber (brown) |
| T32a | 32-pin connector, at dash panel insert (blue) |
| T32b | 32-pin connector, at dash panel insert (green) |
| 85 | Earth connection, in engine compartment wiring harness |
| A17 | Connection (61), in dash panel wiring harness |
| A20 | Positive connection (15a), in dash panel wiring harness |
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