| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| F18 | Thermal switch for radiator fan |
| S162 | Fuse 1 (30), on battery fuse holder |
| S163 | Fuse 2 (30), on battery fuse holder |
| S164 | Fuse 2 (30), on battery fuse holder |
| S176 | Fuse 4 (30), on battery fuse holder |
| S179 | Fuse 7 (30), on battery fuse holder |
| T2b | 2-pin connector, black, near starter |
| T3c | 3-pin connector, black, on radiator fan |
| T4g | 4-pin connector, black, near battery |
| T10a | 10-pin connector, green, near relay station |
| T10d | 10-pin connector, red, near relay station |
| V7 | Radiator fan |
| 1 | Earth strap, battery - body |
| 12 | Earth point, on left in engine compartment |
| 500 | Screw connection 1 (30), on relay plate |
| * | Only models with coolant heater element |
| D | Ignition/starter switch |
| G28 | Engine speed sender (00513) |
| G42 | Intake air temperature sender (00523) |
| J248 | Diesel direct injection system control unit, on right in plenum chamber |
| J362 | Immobilizer control unit, next to steering column |
| S3 | Fuse on fuse holder |
| S9 | Fuse on fuse holder |
| T3d | 3-pin connector, black, on left on cylinder head |
| T10a | 10-pin connector, green, near relay station |
| T10b | 10-pin connector, black, near relay station |
| T10d | 10-pin connector, red, near relay station |
| T80 | 80-pin connector, black |
| 10 | Earth point, in plenum chamber |
| 85 | Earth connection 1, in engine compartment wiring harness |
| 220 | Earth connection (sender earth), in engine wiring harness |
| B135 | Connection (15a), in interior wiring harness |
| * | Only models with coolant heater element |
| ** | Not with coolant heater element |
| F36 | Clutch pedal switch (00650) |
| G80 | Needle lift sender (00542) |
| 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) |
| T2a | 2-pin connector, brown, on left on cylinder head near injector pump |
| T10a | 10-pin connector, green, near relay station |
| T10f | 10-pin connector, black, on injection pump |
| T80 | 80-pin connector, black |
| 12 | Earth point, on left in engine compartment |
| 85 | Earth connection 1, in engine compartment wiring harness |
| F26 | Connection 2, in diesel direct injection system wiring harness |
| F28 | Connection 3, in diesel direct injection system wiring harness |
| G79 | Accelerator position sender (00777) |
| J248 | Diesel direct injection system control unit, on right in plenum chamber |
| J325 | Coolant heater element relay, on coolant circuit (01160) |
| J360 | High heat output relay, on centre of bulkhead (01194) |
| N18 | Exhaust gas recirculation valve (01265) |
| Q7 | Glow plugs, coolant |
| S109 | Glow plug fuse - (coolant) |
| T6b | 6-pin connector, black, behind relay plate |
| T10c | 10-pin connector, blue, near relay station |
| T24 | 24-pin connector, black, on engine |
| T80 | 80-pin connector, black |
| F32 | Connection (glow plugs, coolant) in diesel direct injection system wiring harness |
| 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, on relay carrier (01054) |
| N108 | Commencement of injection valve (01269) |
| N109 | Fuel switch-off valve (01237) |
| N211 | Throttle butterfly valve |
| S2 | Fuses on fuse holder |
| S10 | Fuses on fuse holder |
| T10 | 10-pin connector, white, near relay station |
| T10a | 10-pin connector, green, near relay station |
| T10b | 10-pin connector, black, near relay station |
| T10f | 10-pin connector, black, on injection pump |
| T24 | 24-pin connector, black, on engine |
| T80 | 80-pin connector, black |
| 501 | Screw connection 2 (30), on relay plate |
| B150 | Positive connection 2 (30a), in interior wiring harness |
| F25 | Connection 1, in diesel direct injection system wiring harness |
| F | Brake light switch (00526) |
| F22 | Oil pressure switch (0.3 bar) (00772) |
| F47 | Cruise control system brake pedal switch/diesel direct injection system (00629) |
| G | Fuel gauge sender |
| G22 | Speedometer sender (Hall sender on gearbox) |
| G32 | Coolant shortage indicator sender |
| J52 | Glow plug relay, near relay station (01266) |
| Q6 | Engine glow plugs |
| S20 | Fuses on fuse holder |
| T10 | 10-pin connector, white, near relay station |
| T10a | 10-pin connector, green, near relay station |
| T10b | 10-pin connector, black, near relay station |
| T10d | 10-pin connector, red, near relay station |
| T24 | 24-pin connector, black, on engine |
| 15 | Earth point, on cylinder head |
| B131 | Connection (54), in interior wiring harness |
| F31 | Connection (engine glow plugs), in diesel direct injection system wiring harness |
| F1 | Oil pressure switch |
| G1 | Fuel gauge |
| G3 | Coolant temperature gauge |
| 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 |
| K29 | Glow period warning lamp (00626) |
| T10a | 10-pin connector, green, near relay station |
| T10d | 10-pin connector, red, near relay station |
| T24 | 24-pin connector, black, on engine |
| T32 | 32-pin connector, black, on dash panel insert |
| T32a | 32-pin connector, blue, on dash panel insert |
| Y4 | Trip counter |
| B149 | Positive connection 2 (15a), in interior wiring harness |
