| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| Q6 | Glow plugs (engine) |
| S39 | Strip fuse for glow plugs (engine) |
| T2h | 2-pin connector, blue, in engine compartment |
| T6z | 6-pin connector, red, connector point, electronics box, plenum chamber |
| T10m | 10-pin connector, brown, connector point, electronics box, in plenum |
| A17 | Connection (61), in dash panel wiring harness |
| D16 | Connection (glow plugs), in engine compartment wiring harness |
| 11 | Earth point, in plenum chamber |
| * | Only models with manual gearbox |
| J52 | Glow plug relay |
| J248 | Diesel direct injection system control unit |
| J322 | Diesel direct injection system relay |
| S51 | Fuse (Positive (+) connection D103), in engine compartment wiring harness |
| T6z | 6-pin connector, red, connector point, electronics box, plenum chamber |
| T10 | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| T10m | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T10s | 10-pin connector, white, connector point, electronics box, plenum chamber |
| T10y | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| T10z | 10-pin connector, yellow, connector point, electronics box, plenum chamber |
| A40 | Positive (+) connection -1- (30), in dash panel wiring harness |
| D101 | Connection -1-, in engine compartment wiring harness |
| * | Only models with manual gearbox |
| ** | See applicable Current Flow Diagram: automatic gearbox |
| F | Brake light switch |
| F36 | Clutch pedal switch |
| J189 | Auto-check system |
| J248 | Diesel direct injection system control unit |
| M9 | Brake light bulb, left |
| M10 | Brake light bulb, right |
| N18 | Exhaust gas recirculation valve |
| N75 | Charge pressure control solenoid valve |
| T6e | 6-pin connector, blue, left connector point, A pillar |
| T10 | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| T10m | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T10s | 10-pin connector, white, connector point, electronics box, plenum chamber |
| T10z | 10-pin connector, yellow, connector point, electronics box, plenum chamber |
| T20 | 20-pin connector, red/white, on bulb monitoring device |
| A18 | Connection (54), in dash panel wiring harness |
| A32 | Positive (+) connection (30), in dash panel wiring harness |
| D103 | Connection -3-, in engine compartment wiring harness |
| 12 | Earth point, in engine compartment, left |
| 156 | Earth connection, in diesel direct injection system wiring harness |
| * | Only models with manual gearbox |
| ** | See applicable cruise control system Current Flow Diagram |
| *** | Only models with auto-check system |
| G70 | Air mass meter |
| G80 | Needle lift sender |
| G81 | Fuel temperature sender |
| G149 | Modulating piston movement sender |
| J248 | Diesel direct injection system control unit |
| N108 | Commencement of injection valve |
| N109 | Fuel shut-off valve |
| N146 | Metering adjuster |
| T2k | 2-pin connector, brown, in engine compartment |
| T3a | 3-pin connector, black, in engine compartment |
| T8d | 8-pin connector, in engine compartment |
| D103 | Connection -3-, in engine compartment wiring harness |
| F25 | Connection -1-, in diesel direct injection system wiring harness |
| 12 | Earth connection, in engine compartment, left |
| 156 | Earth connection, in diesel direct injection system wiring harness |
| F8 | Kick-down switch |
| F60 | Idling switch |
| G2 | Coolant temperature sender |
| G28 | Engine speed sender |
| G62 | Coolant temperature sender |
| G72 | Intake manifold temperature sender |
| G79 | Accelerator pedal position sender |
| J248 | Diesel direct injection system control unit |
| T3m | 3-pin connector, grey, in engine compartment, left |
| T10m | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T10s | 10-pin connector, white, connector point, electronics box, plenum chamber |
| T10z | 10-pin connector, yellow, connector point, electronics box, plenum chamber |
| F26 | Connection -2-, in diesel direct injection system wiring harness |
| 135 | Earth connection -2-, in dash panel wiring harness |
| 156 | Earth connection, in diesel direct injection system wiring harness |
| * | Only models with automatic gearbox |
| J248 | Diesel direct injection system control unit |
| J359 | Low heat output relay |
| J360 | High heat output relay |
| J362 | Immobilizer control unit |
| Q7 | Coolant heating elements |
| S109 | Coolant heater element fuse (coolant, high heat output) |
| S124 | Coolant heater element fuse (coolant, low heat output) |
| T6z | 6-pin connector, red, connector point, electronics box, plenum chamber |
| T10z | 10-pin connector, yellow, connector point, electronics box, plenum chamber |
| * | Only models with manual gearbox |
| D | Ignition/starter switch |
| F1 | Oil pressure switch |
| F66 | Coolant shortage indicator switch |
| G8 | Oil temperature sender |
| J218 | Combi-processor in dash panel insert |
| K2 | Alternator warning lamp |
| K29 | Glow period warning lamp |
| S6 | Fuse in fuse box |
| S15 | Fuse in fuse box |
| T4a | 4-pin connector, black, on dash panel insert |
| T10m | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T26 | 26-pin connector, yellow, on dash panel insert |
| T26a | 26-pin connector, blue, on dash panel insert |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A27 | Connection (speed signal), in dash panel wiring harness |
| A32 | Positive (+) connection (30), in dash panel wiring harness |
| A50 | Positive (+) connection (30as), in dash panel wiring harness |
| A74 | Positive (+) connection (15a, fuse 231), in dash panel wiring harness |
| 135 | Earth connection -2-, in dash panel wiring harness |
| 156 | Earth connection, in diesel direct injection system wiring harness |
| * | Only models with additional instruments |
| E87 | Control and display unit for air conditioner/Climatronic |
| G | Fuel gauge sender |
| G6 | Fuel pump (pre-supply pump) |
| G68 | Vehicle speed sender |
| J104 | ABS with EDL control unit |
| J217 | Automatic gearbox control unit |
| J218 | Combi-processor in dash panel insert |
| J234 | Airbag control unit |
| J362 | Immobilizer control unit |
| K | Dash panel insert |
| T10a | 10-pin connector, brown, left connector point, A pillar |
| T10b | 10-pin connector, orange, left connector point, A pillar |
| T10m | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T10v | 10-pin connector, brown, right connector point, A pillar |
| T16 | 16-pin connector, (diagnosis connection), centre console rear |
| T26 | 26-pin connector, yellow, on dash panel insert |
| T26a | 26-pin connector, blue, on dash panel insert |
| A45 | Connection (engine speed signal), in dash panel wiring harness |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| 86 | Earth connection -1-, in rear wiring harness |
| 156 | Earth connection, in diesel direct injection system wiring harness |
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