| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| F18 | Radiator fan thermal switch |
| K2 | Alternator warning lamp |
| S131 | Fuse in fuse holder on the battery |
| S132 | Fuse in fuse holder on the battery |
| S138 | Fuse in fuse holder on the battery |
| S164 | Fuse in fuse holder on the battery |
| T1a | 1-pin connector, at starter |
| T2f | 2-pin connector, at alternator |
| T2g | 2-pin connector, in the holder on the starter |
| T3f | 3-pin connector, on the fuse holder on the battery |
| T3g | 3-pin connector, at radiator fan thermal switch |
| T3h | 3-pin connector, in the holder on the left radiator |
| T6a | 6-pin connector, in plenum chamber (red) |
| T10a | 10-pin connector, in plenum chamber (white) |
| V7 | Radiator fan |
| 12 | Earth point, below the battery on the left |
| P1 | Positive connection (30), in fuse holder on the battery |
| * | only on vehicles with optional equipment |
| ** | only on vehicles without air conditioning system |
| J52 | Glow plug relay |
| J248 | Diesel direct injection system control unit |
| J359 | Low heat output relay |
| J360 | High heat output relay |
| N18 | Exhaust gas recirculation valve |
| N75 | Charge pressure control solenoid valve |
| Q6 | Glow plugs |
| Q7 | Coolant glow plugs |
| T2e | 2-pin connector, in left wiring duct (black) |
| T2f | 2-pin connector, at exhaust gas recirculation valve |
| T2g | 2-pin connector, at charge pressure control solenoid valve |
| T10a | 10-pin connector, in plenum chamber (white) |
| T52a | 52-pin connector, at diesel direct injection system control unit |
| 10 | Earth point, in plenum chamber |
| 156 | Earth connection, in engine compartment wiring harness |
| D78 | Positive connection (30a), in engine compartment wiring harness |
| D102 | Positive connection (87a), in engine compartment wiring harness |
| F32 | Connection, in engine compartment wiring harness |
| * | only on vehicles with optional equipment |
| F8 | Kick-down switch |
| F60 | Idling switch |
| G28 | Engine speed sender |
| G70 | Air mass meter |
| G71 | Intake manifold pressure sender |
| G72 | Intake manifold temperature sender |
| G79 | Accelerator pedal position sender |
| G80 | Needle lift sender |
| J248 | Diesel direct injection system control unit |
| J322 | Diesel direct injection system relay |
| T2h | 2-pin connector, at needle lift sender |
| T3i | 3-pin connector, at engine speed sender |
| T4m | 4-pin connector, at intake manifold pressure sender and intake manifold temperature sender |
| T6a | 6-pin connector, in plenum chamber (red) |
| T6l | 6-pin connector, at accelerator pedal position sender |
| T6m | 6-pin connector, at air mass meter |
| T10j | 10-pin connector, in plenum chamber (blue) |
| T10k | 10-pin connector, in plenum chamber (black) |
| T28a | 28-pin connector, at diesel direct injection system control unit |
| T52a | 52-pin connector, at diesel direct injection system control unit |
| 156 | Earth connection, in engine compartment wiring harness |
| 220 | Earth connection (sender earth), in engine compartment wiring harness |
| A40 | Positive connection (30), in wiring harness behind dash panel, left |
| F27 | Connection, in engine prewiring wiring harness |
| G81 | Fuel temperature sender |
| G149 | Modulating piston movement sender |
| J248 | Diesel direct injection system control unit |
| K29 | Glow period warning lamp |
| N108 | Commencement of injection valve |
| N109 | Fuel shut-off valve |
| N146 | Metering adjuster |
| T10a | 10-pin connector, in plenum chamber (white) |
| T10f | 10-pin connector, in left wiring duct (black) |
| T10l | 10-pin connector, at the injection pump |
| T28a | 28-pin connector, at diesel direct injection system control unit |
| T32a | 32-pin connector, at dash panel insert (blue) |
| T52a | 52-pin connector, at diesel direct injection system control unit |
| A100 | Connection (87), in wiring harness behind dash panel, left |
| F25 | Connection, in engine prewiring wiring harness |
| F | Brake light switch |
| F36 | Clutch pedal switch |
| F47 | Brake pedal switch |
| J248 | Diesel direct injection system control unit |
| J293 | Radiator fan control unit |
| K | Dash panel insert |
| N79 | Heating resistor for crankcase ventilation |
| S13 | Fuse in fuse holder |
| T2j | 2-pin connector, at heating resistor for crankcase ventilation |
| T2k | 2-pin connector, at clutch pedal switch |
| T4n | 4-pin connector, at brake pedal switch |
| T6a | 6-pin connector, in plenum chamber (red) |
| T10a | 10-pin connector, in plenum chamber (white) |
| T10j | 10-pin connector, in plenum chamber (blue) |
| T10k | 10-pin connector, in plenum chamber (black) |
| T10m | 10-pin connector, at radiator fan control unit |
| T28a | 28-pin connector, at diesel direct injection system control unit |
| T32b | 32-pin connector, at dash panel insert (green) |
| T52a | 52-pin connector, at diesel direct injection system control unit |
| 156 | Earth connection, in engine compartment wiring harness |
| A18 | Connection (54), in wiring harness behind dash panel, left |
| A101 | Connection (87), in wiring harness behind dash panel, left |
| * | only on vehicles with manual gearbox |
| ** | only on vehicles with optional equipment |
| *** | only on vehicles with air conditioning system |
| only on vehicles with multi-function display |
| G22 | Speedometer sender |
| T3j | 3-pin connector, at speedometer sender |
| T6a | 6-pin connector, in plenum chamber (red) |
| T10a | 10-pin connector, in plenum chamber (white) |
| T10f | 10-pin connector, in left wiring duct (black) |
| T10j | 10-pin connector, in plenum chamber (blue) |
| 119 | Earth connection, in front left wiring harness |
| A2 | Positive connection (15), in wiring harness behind dash panel |
| A38 | Positive connection (15a), in wiring harness behind dash panel, left |
| A99 | Connection (87), in wiring harness behind dash panel |
| A100 | Connection (87), in wiring harness behind dash panel, left |
| A101 | Connection (87), in wiring harness behind dash panel, left |
| B146 | Positive connection (87), in wiring harness behind dash panel, left |
| D102 | Positive connection (87a), in engine compartment wiring harness |
| D103 | Positive connection (87a), in engine compartment wiring harness |
| ** | only on vehicles with optional equipment |
| F1 | Oil pressure switch |
| G | Fuel gauge sender |
| G1 | Fuel gauge |
| G2 | Coolant temperature gauge sender |
| G5 | Rev. Counter |
| G62 | Coolant temperature sender |
| J218 | Combi-processor in dash panel insert |
| K | Dash panel insert |
| K3 | Oil pressure warning lamp |
| K16 | Reserve fuel warning lamp |
| T2i | 2-pin connector, at fuel gauge sender |
| T4i | 4-pin connector, at coolant temperature sender |
| T10f | 10-pin connector, in left wiring duct (black) |
| T32a | 32-pin connector, at dash panel insert (blue) |
| T32b | 32-pin connector, at dash panel insert (green) |
| 110 | Earth connection, in wiring harness behind dash panel |
| A27 | Connection (speed signal), in wiring harness behind dash panel, left (only on vehicles with central locking) |
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