| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| F18 | Thermal switch for radiator fan |
| SA1 | Fuse 1 (30), on battery fuse holder |
| SA2 | Fuse 2 (30), on battery fuse holder |
| SA3 | Fuse 3 (30), on battery fuse holder |
| SA4 | Fuse 4 (30), on battery fuse holder |
| SA7 | Fuse 7 (30), on battery fuse holder |
| T2b | 2-pin connector, black, near alternator |
| T3b | 3-pin connector, black, on radiator fan |
| T4g | 4-pin connector, black, on battery fuse holder |
| T10a | 10-pin connector, green, coupling station under relay carrier¹) |
| V7 | Radiator fan |
| 1 | Earth strap, battery - body |
| 167 | Earth connection 4, in engine compartment wiring harness |
| 500 | Screw connection 1 (30), on relay plate |
| 502 | Screw connection 1 (30a), on relay plate |
| * | Only models with coolant heater element(s) |
| ¹) | Connections, see section "Fitting locations" |
| G28 | Engine speed sender (00513) |
| G42 | Intake air temperature sender (00523) |
| J248 | Diesel direct injection system control unit, on right in plenum chamber |
| J362 | Immobiliser control unit |
| T3a | 3-pin connector, black, on left on cylinder head |
| T8b | 8-pin connector, black, on immobilizer control unit |
| T10a | 10-pin connector, green, coupling station under relay carrier¹) |
| T10d | 10-pin connector, red, coupling station under relay carrier¹) |
| T80 | 80-pin connector, on diesel direct injection system control unit |
| 10 | Earth point, in plenum chamber |
| 85 | Earth connection 1, in engine compartment wiring harness |
| 220 | Earth connection (sender earth), in engine wiring harness |
| * | Only models with coolant heater element |
| ** | Not with coolant heater element |
| ¹) | Connections, see section "Fitting locations" |
| D | Ignition/starter switch |
| G80 | Needle lift sender (00542) |
| J234 | Airbag control unit |
| J248 | Diesel direct injection system control unit, on right in plenum chamber |
| J491 | Fuel shut-off control unit for crash |
| N18 | Exhaust gas recirculation valve (01265) |
| SB29 | Fuse in fuse holder |
| SB31 | Fuse in fuse holder |
| SB32 | Fuse in fuse holder |
| T2a | 2-pin connector, brown, on left on cylinder head near injector pump |
| T10 | 10-pin connector, white, coupling station under relay carrier¹) |
| T10a | 10-pin connector, green, coupling station under relay carrier¹) |
| T10c | 10-pin connector, blue, coupling station under relay carrier¹) |
| T80 | 80-pin connector, on diesel direct injection system control unit |
| 12 | Earth point, on left in engine compartment |
| 85 | Earth connection 1, in engine compartment wiring harness |
| 167 | Earth connection 4, in engine compartment wiring harness |
| A125 | Connection (crash signal), in dash panel wiring harness |
| B102 | Earth connection, in front left interior wiring harness |
| B135 | Connection 1 (15a), in interior wiring harness |
| * | Only with airbag |
| Not with airbag |
| ¹) | Connections, see section "Fitting locations" |
| F36 | Clutch pedal switch (00650) |
| G81 | Fuel temperature sender (00539) |
| G149 | Modulating piston movement sender (00765) |
| J248 | Diesel direct injection system control unit, on right in plenum chamber |
| N146 | Metering adjuster (01268) |
| SB37 | Fuse in fuse holder |
| T10a | 10-pin connector, green, coupling station under relay carrier¹) |
| T10d | 10-pin connector, coupling station under relay carrier¹) |
| T10h | 10-pin connector, black, on left on cylinder head |
| T80 | 80-pin connector, on diesel direct injection system control unit |
| F26 | Connection 2, in diesel direct injection system wiring harness |
| F28 | Connection 3, in diesel direct injection system wiring harness |
| ¹) | Connections, see section "Fitting locations" |
| G79 | Accelerator position sender (00777) |
| J248 | Diesel direct injection system control unit, on right in plenum chamber |
| J359 | Low heat output relay (01193) |
| J360 | High heat output relay (01194) |
| Q7 | Coolant heater element(s) |
| T6 | 6-pin connector, black, in front left footwell |
| T10c | 10-pin connector, blue, coupling station under relay carrier¹) |
| T24 | 24-pin connector, black, on left of cylinder head¹) |
| T80 | 80-pin connector, on diesel direct injection system control unit |
| D50 | Positive connection (30), in engine compartment wiring harness |
| D98 | Connection (glow plugs), in engine compartment wiring harness |
| * | Only models with coolant heater element |
| ¹) | Connections, see section "Fitting locations" |
| G2 | Coolant temperature sender |
| G27 | Engine temperature sender (01204) |
| J248 | Diesel direct injection system control unit, on right in plenum chamber |
| J317 | Terminal 30 voltage supply relay (01054) |
| N108 | Commencement of injection valve (01269) |
| N109 | Fuel switch-off valve (01237) |
| N211 | Throttle butterfly valve |
| SB24 | Fuse in relay plate fuse holder |
| SB25 | Fuse in relay plate fuse holder |
| T10a | 10-pin connector, green, coupling station under relay carrier¹) |
| T10h | 10-pin connector, black, near injection pump |
| T24 | 24-pin connector, black, on left of cylinder head¹) |
| T80 | 80-pin connector, on diesel direct injection system control unit |
| F25 | Connection 1, in diesel direct injection system wiring harness |
| D73 | Positive connection (54), in engine compartment wiring harness |
| * | Only with ABS |
| ** | Not with ABS |
| ¹) | Connections, see section "Fitting locations" |
| F | Brake light switch (00526) |
| F1 | Oil pressure switch |
| F47 | Cruise control system brake pedal switch/diesel direct injection system (00629) |
| G22 | Speedometer sender (Hall sender on gearbox) |
| J52 | Glow plug relay (01266) |
| Q6 | Engine glow plugs |
| SB15 | Fuse in relay plate fuse holder |
| T10 | 10-pin connector, white, coupling station under relay carrier¹) |
| T10a | 10-pin connector, green, coupling station under relay carrier¹) |
| T10b | 10-pin connector, black, coupling station under relay carrier¹) |
| T10d | 10-pin connector, red, coupling station under relay carrier¹) |
| T24 | 24-pin connector, black, on left of cylinder head¹) |
| 15 | Earth point, on cylinder head |
| B149 | Positive connection 2 (15a), in interior wiring harness |
| B150 | Positive connection 2 (30a), in interior wiring harness |
| F31 | Connection (engine glow plugs), in diesel direct injection system wiring harness |
| * | Only with ABS |
| ** | Not with ABS |
| ¹) | Connections, see section "Fitting locations" |
| G | Fuel gauge sender |
| G1 | Fuel gauge |
| G3 | Coolant temperature display |
| G32 | Coolant shortage indicator sender |
| H11 | Oil pressure warning buzzer |
| 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 |
| T10b | 10-pin connector, black, coupling station under relay carrier¹) |
| T10d | 10-pin connector, red, coupling station under relay carrier¹) |
| T24 | 24-pin connector, black, on left of cylinder head¹) |
| T32 | 32-pin connector, on dash panel insert |
| Y4 | Trip counter |
| ¹) | Connections, see section "Fitting locations" |
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