| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| J226 | Starter inhibitor and reversing light relay |
| S131 | Fuse 1 |
| S132 | Fuse 2 |
| S133 | Fuse 3 |
| S134 | Fuse 4 |
| S138 | Fuse 5 |
| S162 | 1 in fuse box/battery |
| S163 | 2 in fuse box/battery |
| S164 | 3 in fuse box/battery |
| T2f | 2-pin connector, wiring duct, in engine compartment, left |
| T3e | 3-pin connector, black, on main fuse box/battery |
| T6m | 6-pin connector, brown, in plenum chamber |
| 2 | Earth strap, gearbox - body |
| 12 | Earth point, in engine compartment, left |
| A17 | Positive (+) connection (61), in dash panel wiring harness |
| * | Only for heated pin heating (manual gearbox) |
| ** | Only models with manual gearbox |
| *** | Only models with automatic gearbox |
| **** | Only with 1.9 litre-TDI 81 kW |
| ***** | Only with 1.9 litre-TDI 66 kW |
| 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 |
| N239 | Intake manifold flap change-over valve |
| Q6 | Glow plugs (engine) |
| Q7 | Glow plugs (coolant) |
| T2n | 2-pin connector, wiring duct, in engine compartment, left |
| T6m | 6-pin connector, brown, in plenum chamber |
| T10x | 10-pin connector, orange, in plenum chamber |
| T10y | 10-pin connector, green, in plenum chamber |
| 220 | Earth connection (sender earth), in engine wiring harness |
| A108 | Connection (speed signal), in dash panel wiring harness |
| D78 | Positive (+) connection -1- (30a), in engine compartment wiring harness |
| D101 | Connection -1-, in engine compartment wiring harness |
| F32 | Connection (glow plugs - coolant), in diesel direct injection system wiring harness |
| * | Only for heated pin heating (manual gearbox) |
| 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 |
| T3d | 3-pin connector, black, in engine compartment |
| T10g | 10-pin connector, blue, in plenum chamber |
| 10 | Earth point, in plenum chamber |
| 156 | Earth connection, in diesel direct injection wiring harness |
| 220 | Earth connection (sender earth), in engine wiring harness |
| A98 | Positive (+) connection -4- (30), in dash panel wiring harness |
| B156 | Positive (+) connection -4- (30), in interior wiring harness |
| F27 | Connection (screening), in diesel direct injection system wiring harness |
| E87 | Control and display unit for air conditioner |
| G2 | Coolant temperature sender |
| G62 | Coolant temperature sender |
| G81 | Fuel temperature sender |
| G149 | Modulating piston movement sender |
| J217 | Automatic gearbox control unit |
| J248 | Diesel direct injection system control unit |
| N108 | Commencement of injection valve |
| N109 | Fuel shut-off valve |
| N146 | Metering adjuster |
| T6m | 6-pin connector, brown, in plenum chamber |
| T10c | 10-pin connector, black, wiring duct, in engine compartment, left |
| T10h | 10-pin connector, black, centre in engine compartment |
| T10x | 10-pin connector, orange, in plenum chamber |
| 281 | Earth connection -1-, in engine compartment wiring harness (pre-assembled) |
| A100 | Connection -2- (87), in dash panel wiring harness |
| F25 | Connection -1-, in diesel direct injection system wiring harness |
| * | Only models with automatic gearbox |
| ** | Only models with air conditioner |
| E45 | Cruise control system switch |
| J248 | Diesel direct injection system control unit |
| T6m | 6-pin connector, brown, in plenum chamber |
| T7 | 7-pin connector, behind steering column switch trim |
| T10e | 10-pin connector, black, in plenum chamber |
| T10x | 10-pin connector, orange, in plenum chamber |
| T10y | 10-pin connector, green, in plenum chamber |
| 156 | Earth connection, in diesel direct injection wiring harness |
| A101 | Connection -3- (87), in dash panel wiring harness |
| B135 | Positive (+) connection (15a), in interior wiring harness |
| D102 | Connection -2-, in engine compartment wiring harness |
| * | Only models with cruise control system |
| ** | Does not apply to models heated pin heating |
| *** | Only for heated pin heating (manual gearbox) |
| F36 | Clutch pedal switch |
| F47 | Brake pedal switch for diesel direct inj. system |
| J104 | ABS with EDL control unit |
| J248 | Diesel direct injection system control unit |
| N79 | Heater element (crankcase breather) |
| T2m | 2-pin connector, wiring duct, in engine compartment, left |
| T6m | 6-pin connector, brown, in plenum chamber |
| T10e | 10-pin connector, black, in plenum chamber |
| T10x | 10-pin connector, orange, in plenum chamber |
| T10y | 10-pin connector, green, in plenum chamber |
| 156 | Earth connection, in diesel direct injection wiring harness |
| A45 | Connection (engine speed signal), in dash panel wiring harness |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| B131 | Connection (54), in interior wiring harness |
| B148 | Positive (+) connection -3- (87), in interior wiring harness |
| * | Only models with manual gearbox |
| ** | Only for heated pin heating (manual gearbox) and export versions (nordic countries) |
| *** | Only models with automatic gearbox |
| CAN bus (data wire) |
| F18 | Radiator fan thermo-switch |
| F54 | Radiator fan thermo-switch |
| J397 | Radiator fan run-on relay |
| T10g | 10-pin connector, blue, in plenum chamber |
| V7 | Radiator fan |
| 12 | Earth point, in engine compartment, left |
| A68 | Connection (30, air conditioner), in dash panel wiring harness |
| L26 | Connection (radiator fan), in engine compartment - Climatronic wiring harness |
| * | Only with 1.9 litre-TDI 81 kW |
| ** | Only with 1.9 litre-TDI 66 kW |
| D | Ignition/starter switch |
| G | Fuel gauge sender |
| G22 | Speedometer sender (Hall sender, on gearbox) |
| J218 | Combi-processor in dash panel insert |
| K29 | Glow period warning lamp |
| S7 | Fuse in fuse box |
| T10c | 10-pin connector, black, wiring duct, in engine compartment, left |
| T32 | 32-pin connector, blue, on dash panel insert |
| T32a | 32-pin connector, green, on dash panel insert |
| 278 | Earth connection -4-, in interior wiring harness |
| 280 | Earth connection -2-, in engine compartment wiring harness |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A15 | Positive (+) connection (15), in dash panel wiring harness |
| B146 | Positive (+) connection -1- (87), in interior wiring harness |
| B149 | Positive (+) connection -2- (15a), in interior wiring harness |
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