| A1 | Second battery |
| J317 | Terminal 30 voltage supply relay |
| J581 | Battery parallel circuit relay |
| J689 | Terminal 30 voltage supply relay 2 |
| S8 | Fuse in relay plate fuse holder, in engine compartment |
| S9 | Fuse in relay plate fuse holder, in engine compartment |
| S10 | Fuse in relay plate fuse holder, in engine compartment |
| S11 | Fuse in relay plate fuse holder, in engine compartment |
| S12 | Fuse in relay plate fuse holder, in engine compartment |
| S13 | Fuse in relay plate fuse holder, in engine compartment |
| S15 | Fuse in relay plate fuse holder, in engine compartment |
| S16 | Fuse in relay plate fuse holder |
| S17 | Fuse in relay plate fuse holder, in engine compartment |
| T10d | 10-pin connector, blue, electronics box engine compartment |
| 49 | Earth point, near second battery |
| 39 | Earth point, under rear left seat |
| 201 | Earth connection -5-, in engine compartment wiring harness |
| 647 | Earth point 3, bulkhead |
| D75 | Positive connection 2 (30), in engine compartment wiring harness |
| D97 | Connection (50), in engine compartment right wiring harness |
| D109 | Connection 7, in engine compartment wiring harness |
| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| J518 | Entry and start authorisation control unit |
| J519 | Onboard supply control unit |
| J682 | Terminal 50 voltage supply relay |
| J701 | Voltage supply relay 1, start relevant consumers |
| J710 | Voltage supply relay 2, start relevant consumers |
| SD8 | Fuse 8 on fuse holder |
| SD11 | Fuse 11 on fuse holder |
| T6ma | 6-pin connector, white, electronics box engine compartment |
| T10c | 10-pin connector, pink, electronics box engine compartment |
| T10d | 10-pin connector, blue, electronics box engine compartment |
| T10f | 10-pin connector, red, electronics box front engine compartment |
| T10ma | 10-pin connector, black, electronics box engine compartment |
| T18 | 18-pin connector |
| T81 | 81-pin connector |
| TV2 | Terminal 30 wiring junction |
| TV15 | Wiring connector |
| TV22 | Terminal 30 wiring junction 2 |
| 201 | Earth connection -5-, in engine compartment wiring harness |
| D50 | Positive connection (30), in engine compartment wiring harness |
| D75 | Positive connection 2 (30), in engine compartment wiring harness |
| D97 | Connection (50), in engine compartment right wiring harness |
| D108 | Connection 6, in engine compartment wiring harness |
| D112 | Connection 10, in engine compartment wiring harness |
| D144 | Positive connection 5 (30), in engine compartment wiring harness |
| J52 | Glow plug relay |
| J623 | Engine control unit |
| Q10 | Glow plug 1 |
| Q11 | Glow plug 2 |
| Q12 | Glow plug 3 |
| Q13 | Glow plug 4 |
| Q14 | Glow plug 5 |
| S1 | Fuse in relay plate fuse holder, in engine compartment |
| S2 | Fuse in relay plate fuse holder, in engine compartment |
| S3 | Fuse in relay plate fuse holder, in engine compartment |
| S4 | Fuse in relay plate fuse holder, in engine compartment |
| S6 | Fuse in relay plate fuse holder, in engine compartment |
| S7 | Fuse in relay plate fuse holder, in engine compartment |
| T5mg | 5-pin connector, black, on front left engine |
| T94aa | 94-pin connector |
| D50 | Positive connection (30), in engine compartment wiring harness |
| D98 | Connection (glow plugs), in engine compartment wiring harness |
| D112 | Connection 10, in engine compartment wiring harness |
| D113 | Connection 11, in engine compartment wiring harness |
| J623 | Engine control unit |
| N240 | Unit injector valve, No. 1 cyl. |
| N241 | Unit injector valve, No. 2 cyl. |
| N242 | Unit injector valve, No. 3 cyl. |
| N243 | Unit injector valve, No. 4 cyl. |
| N244 | Unit injector valve, No. 5 cyl. |
| T6mp | 6-pin connector |
| T10ma | 10-pin connector, black, electronics box engine compartment |
| T60aa | 60-pin connector |
| T94aa | 94-pin connector |
| D95 | Connection (injectors), in engine compartment wiring harness |
| D111 | Connection 9, in engine compartment wiring harness |
| E48 | Connection (injectors), in injection system wiring harness |
| F265 | Map-controlled engine cooling system thermostat |
| G81 | Fuel temperature sender |
| G266 | Oil level and oil temperature sender |
| J255 | Climatronic control unit |
| J623 | Engine control unit |
| T6ma | 6-pin connector, white, electronics box engine compartment |
| T10d | 10-pin connector, blue, electronics box engine compartment |
| T10f | 10-pin connector, red, electronics box engine compartment |
| T60aa | 60-pin connector |
| V157 | Intake manifold flap motor |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| D107 | Connection 5, in engine compartment wiring harness |
| E30 | Connection (87a), in engine wiring harness |
| G28 | Engine speed sender |
| G40 | Hall sender |
| G62 | Coolant temperature sender |
| G133 | Fuel composition sender |
| J527 | Steering column electronics control unit |
| J623 | Engine control unit |
| T10c | 10-pin connector, pink, electronics box engine compartment |
| T10d | 10-pin connector, blue, electronics box engine compartment |
| T16a | 16-pin connector, steering column |
| T60aa | 60-pin connector |
| T94aa | 94-pin connector |
| D101 | Connection 1, in engine compartment wiring harness |
| D102 | Connection 2, in engine compartment wiring harness |
| F | Brake light switch |
| F47 | Cruise control system brake pedal switch/diesel direct injection system |
| G70 | Air mass meter |
| J623 | Engine control unit |
| SB26 | Fuse 26 on fuse holder |
| SB38 | Fuse 38 on fuse holder |
| T10c | 10-pin connector, pink, electronics box engine compartment |
| T10d | 10-pin connector, blue, electronics box engine compartment |
| T94aa | 94-pin connector |
| B278 | Positive connection 2 (15a), in main wiring harness |
| B335 | Connection 1 (54), in main wiring harness |
| D52 | Positive connection (15a), in engine compartment wiring harness |
| * | from May 2003 |
| G65 | High pressure sender |
| J17 | Fuel pump relay |
| J293 | Radiator fan control unit |
| J519 | Onboard supply control unit |
| J623 | Engine control unit |
| J671 | Radiator fan control unit -2- |
| J715 | Tank circuit pressurisation relay fuel supply |
| N18 | Exhaust gas recirculation valve |
| T6k | 6-pin connector, brown |
| T10c | 10-pin connector, pink, electronics box engine compartment |
| T18 | 18-pin connector |
| T94aa | 94-pin connector |
| V7 | Radiator fan |
| V177 | Radiator fan 2 |
| 12 | Earth point, on left in engine compartment |
| D106 | Connection 4, in engine compartment wiring harness |
| D122 | Connection 20, in engine compartment wiring harness |
| D123 | Connection 21, in engine compartment wiring harness |
| D129 | Connection 27, in engine compartment wiring harness |
| * | only models with auxiliary coolant heater |
| F8 | Kick-down switch |
| F60 | Idling speed switch |
| G79 | Accelerator position sender |
| J445 | Fuel cooling pump relay |
| J496 | Additional coolant pump relay |
| J623 | Engine control unit |
| T6k | 6-pin connector, brown |
| T6ma | 6-pin connector, white, on electronics box engine compartment |
| T10e | 10-pin connector, green, electronics box engine compartment |
| T10f | 10-pin connector, red, electronics box engine compartment |
| T60aa | 60-pin connector |
| T94aa | 94-pin connector |
| V51 | Continued coolant circulation pump |
| V166 | Fuel cooling pump |
| V280 | Turbocharger 1 control motor |
| 85 | Earth connection 1, in engine compartment wiring harness |
| D78 | Positive connection 1 (30a), in engine compartment wiring harness |
| D103 | Connection 3, in engine compartment wiring harness |
| D130 | Connection 28, in engine compartment wiring harness |
| D159 | Connection (high bus), in engine compartment wiring harness |
| D160 | Connection (low bus), in engine compartment wiring harness |
| * | not for all versions |
| ** | is dropped from May 2003 |
| J623 | Engine control unit |
| J624 | Engine control unit 2 |
| T10d | 10-pin connector, blue, electronics box engine compartment |
| T10ma | 10-pin connector, black, electronics box engine compartment |
| T60aa | 60-pin connector |
| T94aa | 94-pin connector |
| T60ab | 60-pin connector |
| T94ab | 94-pin connector |
| 85 | Earth connection 1, in engine compartment wiring harness |
| 132 | Earth connection 3, in engine compartment wiring harness |
| 167 | Earth connection 4, in engine compartment wiring harness |
| 646 | Earth point 2, on bulkhead |
| B509 | Connection 3 (diagnosis), in main wiring harness |
| D159 | Connection (high bus), in engine compartment wiring harness |
| D160 | Connection (low bus), in engine compartment wiring harness |
| D166 | Connection (K-diagnosis wiring), in engine compartment wiring harness |
| D178 | Connection 2 (high bus), in engine compartment wiring harness |
| D179 | Connection 2 (low bus), in engine compartment wiring harness |
| * | from May 2003 |
| J255 | Climatronic control unit |
| J624 | Engine control unit 2 |
| N280 | Air conditioning system compressor regulating valve |
| T5ma | 5-pin connector, black, on front left engine |
| T10f | 10-pin connector, red, electronics box engine compartment |
| T60ab | 60-pin connector |
| T94ab | 94-pin connector |
| V275 | Intake manifold flap 2 motor |
| V281 | Turbocharger 2 control motor |
| 85 | Earth connection 1, in engine compartment wiring harness |
| D130 | Connection 28, in engine compartment wiring harness |
| D159 | Connection (high bus), in engine compartment wiring harness |
| D160 | Connection (low bus), in engine compartment wiring harness |
| * | not for all versions |
| ** | is dropped from May 2003 |
| G248 | Fuel temperature sender 2 |
| J624 | Engine control unit 2 |
| N245 | Unit injector valve, No. 6 cyl. |
| N303 | Unit injector valve, No. 7 cyl. |
| N304 | Unit injector valve, No. 8 cyl. |
| N305 | Unit injector valve, No. 9 cyl. |
| N306 | Unit injector valve, No. 10 cyl. |
| T7mp | 7-pin connector |
| T60ab | 60-pin connector |
| D137 | Connection 2 (injectors), in engine compartment wiring harness |
| E55 | Connection 2 (injectors), in injection system wiring harness |
| G | Fuel gauge sender |
| G6 | Fuel pump (pre-supply pump) |
| G23 | Fuel pump |
| G32 | Coolant shortage indicator sender |
| G237 | Fuel gauge sender 3 |
| J285 | Control unit with display in dash panel insert |
| J533 | Data bus diagnostic interface |
| T4af | 4-pin connector |
| T5k | 5-pin connector |
| T16b | 16-pin connector, self-diagnosis connection, driver footwell |
| T32a | 32-pin connector, blue, on dash panel insert |
| T32b | 32-pin connector, green, on dash panel insert |
| 39 | Earth point, under rear left seat |
| 410 | Earth connection 1 (sender earth), in main wiring harness |
| B385 | Connection 3 (drive train CAN bus, high), in main wiring harness |
| B392 | Connection 3 (drive train CAN bus, low), in main wiring harness |
| B429 | Connection (EFPR), in main wiring harness |
| B444 | Connection 1 (diagnosis), in main wiring harness |
| * | from May 2003 |
