| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition starter switch |
| F18 | Radiator fan thermal switch |
| J519 | Vehicle voltage control unit |
| SA1 | Fuse 1 on fuse holder A |
| SA6 | Fuse 6 on fuse holder A |
| SA8 | Fuse 8 on fuse holder A |
| T2w | 2-pin connector, in the holder on the gearbox |
| T3e | 3-pin connector, in the holder on the left radiator |
| T3h | 3-pin connector, on radiator fan thermal switch |
| T8a | 8-pin connector, at ignition starter switch |
| T18a | 18-pin connector, at onboard supply control unit (brown) |
| V7 | Radiator fan |
| 672 | Earth point 2 at front left longitudinal member |
| B344 | Connection 1 (61) in main wiring harness |
| Radiator fan thermal switch and radiator fan depending upon optional equipment (not valid for vehicles with Climatic / Climatronic) |
| J52 | Glow plug relay |
| J519 | Vehicle voltage control unit |
| J623 | Engine control unit |
| T2g | 2-pin connector in engine compartment, left (connection engine wiring harness / main wiring harness) |
| T14a | 14-pin connector in engine compartment, left (connection engine wiring harness / main wiring harness) |
| T81a | 81-pin connector, at engine control unit |
| Q6 | Engine glow plug |
| 12 | Earth point on left in engine compartment |
| 376 | Earth connection 11 in main wiring harness |
| B278 | Positive connection 2 (15a) in main wiring harness |
| D37 | Connection (glow plugs) in engine wiring harness |
| F | Brake light switch |
| F8 | Kick-down switch |
| F36 | Clutch pedal switch |
| F47 | Brake pedal switch |
| F60 | Idling switch |
| G79 | Accelerator pedal position sender |
| G266 | Oil level and oil temperature sender |
| J519 | Vehicle voltage control unit |
| J623 | Engine control unit |
| T3f | 3-pin connector at oil level and oil temperature sender |
| T4d | 4-pin connector, at brake pedal switch |
| T4h | 4-pin connector, at clutch pedal switch |
| T6u | 8-pin connector, at accelerator pedal position sender |
| T81a | 81-pin connector, at engine control unit |
| B335 | Connection 1 (54) in main wiring harness |
| B350 | Positive connection 1 (87a) in main wiring harness |
| B633 | Connection (brake pedal switch) in main wiring harness |
| * | for vehicles with extended servicing intervals (ESI) |
| F268 | Additional heating heater element contact switch |
| G62 | Coolant temperature sender |
| G81 | Fuel temperature sender |
| J519 | Vehicle voltage control unit |
| J623 | Engine control unit |
| N18 | Exhaust gas recirculation valve |
| N75 | Charge pressure control solenoid valve |
| T6z | 8-pin connector, at valve block |
| T10d | 10-pin connector, behind right dash panel |
| T16c | 16-pin connector on the heating and fresh air control |
| T40a | 40-pin connector, at engine control unit |
| T81a | 81-pin connector, at engine control unit |
| B352 | Positive connection 3 (87a) in main wiring harness |
| B441 | Connection (CCS) in main wiring harness |
| * | not valid for vehicles with Climatronic |
| ** | for vehicles with CCS |
| for vehicles with additional air heater |
| G28 | Engine speed sender |
| G40 | Hall sender |
| G70 | Air mass meter |
| G71 | Intake manifold pressure sender |
| G72 | Intake manifold temperature sender |
| J519 | Vehicle voltage control unit |
| J623 | Engine control unit |
| N79 | Heating resistor for crankcase ventilation |
| T3j | 3-pin connector, at Hall sender |
| T3m | 3-pin connector, at engine speed sender |
| T4p | 4-pin connector, at intake manifold pressure and intake manifold temeprature sender |
| T5b | 5-pin connector, at air mass meter |
| T40a | 40-pin connector, at engine control unit |
| T81a | 81-pin connector, at engine control unit |
| 250 | Earth connection in engine wiring harness, diesel |
| 375 | Earth connection 10 in main wiring harness |
| * | Optional equipement |
| J519 | Vehicle voltage control unit |
| J623 | Engine control unit |
| N240 | Unit injector solenoid valve of No. 1 cyl. |
| N241 | Unit injector solenoid valve of No. 2 cyl. |
| N242 | Unit injector solenoid valve of No. 3 cyl. |
| T8o | 8-pin connector, at cylinder head |
| T16b | 16-pin connector, at onboard supply control unit (black) |
| T40a | 40-pin connector, at engine control unit |
| T81a | 81-pin connector, at engine control unit |
| B383 | Connection 1 (drive train CAN bus High) in main wiring harness |
| B390 | Connection 1 (drive train CAN bus Low) in main wiring harness |
| B625 | Connection (diagnosis wire K), in main wiring harness |
| G7 | Positive connection (unit injector valves) in cylinder head wiring harness |
| for vehicles with additional air heater |
| F1 | Oil pressure switch |
| G | Fuel gauge sender |
| G1 | Fuel gauge |
| G6 | Fuel pump for predelivery |
| G21 | Speedometer |
| G22 | Speedometer sender |
| J285 | Control unit in dash panel insert |
| J519 | Vehicle voltage control unit |
| K | Dash panel insert |
| K3 | Oil pressure warning light |
| K29 | Glow period warning light |
| K38 | Oil level warning light |
| K83 | Exhaust emissions warning lamp |
| K105 | Fuel reserve warning light |
| T3l | 3-pin connector, on speedometer sender |
| T4f | 4-pin connector, on the fuel pump for predelivery |
| T14a | 14-pin connector in engine compartment, left (connection engine wiring harness / main wiring harness) |
| T32a | 32-pin connector, at dash panel insert |
| Y4 | Odometer display |
| 370 | Earth connection 5 in main wiring harness |
| 410 | Earth connection 1 (sender earth) in main wiring harness |
| B464 | Connection (speed signal) in main wiring harness |
| B626 | Positive connection 2 (15) in main wiring harness |
| * | for vehicles with extended servicing intervals (ESI) |
| ** | not valid for vehicles with ABS/ ABS with TCS/ ABS with EDL and TCS/ESP |
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