| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| SA1 | Fuse -1- on battery fuse box |
| SA5 | Fuse -5- on battery fuse box |
| T1 | Single connector, behind relay plate |
| T1g | Single connector, behind relay plate |
| T2j | 2-pin connector, behind relay plate |
| 1 | Earth strap, battery - body |
| 2 | Earth strap, gearbox - body |
| C10 | Positive (+) connection -1- (30), in headlight wiring harness |
| * | Only models with manual gearbox |
| --- | Only models with automatic gearbox fuse |
| J248 | Diesel direct injection system control unit, in engine compartment, left |
| J317 | Terminal 30 voltage supply relay |
| N18 | Exhaust gas recirculation valve |
| N75 | Charge pressure control solenoid valve |
| N108 | Commencement of injection valve |
| N239 | Intake manifold flap change-over valve * |
| S102 | Engine control unit fuse |
| S117 | Control element fuse |
| T3x | 3-pin connector, behind relay plate |
| T10a | 10-pin connector, on engine front |
| T121 | 121-pin connector |
| F25 | Connection -1-, in diesel direct injection system wiring harness |
| F26 | Connection -2-, in diesel direct injection system wiring harness |
| * | Only models from June 2000 |
| F | Brake light switch |
| F4 | Reversing light switch |
| F8 | Kick-down switch |
| F36 | Clutch pedal switch |
| F47 | Cruise control system brake pedal switch (diesel direct injection system) |
| F60 | Idling switch |
| G79 | Accelerator pedal position sender |
| J248 | Diesel direct injection system control unit, in engine compartment, left |
| T2v | 2-pin connector, behind relay plate |
| T12 | 12-pin connector, behind relay plate |
| T121 | 121-pin connector |
| TV5 | Terminal 15a junction box, green |
| D52 | Positive (+) connection (15a), in engine compartment wiring harness |
| * | Only models with manual gearbox |
| ** | Only models with ESP |
| *** | Only models without ESP |
| G71 | Intake manifold pressure sender |
| G72 | Intake manifold temperature sender |
| M22 | Brake and tail light bulb, right |
| J104 | ABS with ESP control unit, in engine compartment, left |
| J248 | Diesel direct injection system control unit, in engine compartment, left |
| J362 | Immobilizer control unit, behind dash panel insert, right |
| T1c | Single connector, behind relay plate |
| T2n | 2-pin connector |
| T2o | 2-pin connector |
| T2p | 2-pin connector |
| T2q | 2-pin connector |
| T2r | 2-pin connector |
| T2s | 2-pin connector |
| T2v | 2-pin connector, behind relay plate |
| T8c | 8-pin connector, up to August 1999 |
| T10 | 10-pin connector, from September 1999 |
| T88 | 88-pin connector |
| T121 | 121-pin connector |
| TV11 | Terminal 54 junction box, orange |
| TV16 | Terminal for data bus, No. 5 on relay location or behind relay plate |
| D73 | Positive (+) connection (54), in engine compartment wiring harness |
| ** | Only models with ESP |
| --- | Only models with automatic gearbox |
| -••- | Only models from September 1999 |
| F266 | Bonnet contact switch |
| G2 | Coolant temperature sender |
| G62 | Coolant temperature sender |
| G266 | Oil level/oil temperature sender** |
| J248 | Diesel direct injection system control unit, in engine compartment, left |
| T2x | 2-pin connector, behind relay plate |
| T3f | 3-pin connector |
| T3x | 3-pin connector, behind relay plate |
| T121 | 121-pin connector |
| 12 | Earth point, in engine compartment, left |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| * | Only models up to September 2000 |
| ** | Only with flexible service interval display |
| *** | Only models up to September 2000 |
| G81 | Fuel temperature sender |
| G149 | Modulating piston movement sender |
| J248 | Diesel direct injection system control unit, in engine compartment, left |
| N109 | Fuel shut-off valve |
| N146 | Metering adjuster |
| T1l | Single connector, behind relay plate, air conditioner shut-off |
| T1o | Single connector, behind relay plate, air conditioner readiness |
| T10a | 10-pin connector, on engine front |
| T121 | 121-pin connector |
| F28 | Connection -3-, in diesel direct injection system wiring harness |
| G28 | Engine speed sender |
| G70 | Air mass meter |
| G80 | Needle lift sender |
| J248 | Diesel direct injection system control unit, in engine compartment, left |
| T2a | 2-pin connector, on engine front |
| T3g | 3-pin connector, on engine front |
| T5a | 5-pin connector |
| T8d | 8-pin connector, behind relay plate |
| T121 | 121-pin connector |
| TV13 | Terminal for speed signal, blue |
| F35 | Connection -4-, in engine compartment wiring harness |
| --- | Only models with automatic gearbox fuse |
| * | Only models up to March 2000 |
| E45 | Cruise control system switch |
| E227 | Cruise control system (CCS) button (Set) |
| J52 | Glow plug relay |
| J248 | Diesel direct injection system control unit, in engine compartment, left |
| Q6 | Glow plugs - engine |
| T4f | 4-pin connector, behind relay plate |
| T4h | 4-pin connector, behind steering column switch trim |
| T5e | 5-pin connector, on engine front |
| T121 | 121-pin connector |
| TV2 | Terminal 30 junction box, red |
| A32 | Positive (+) connection (30), in dash panel wiring harness |
| F31 | Connection (glow plugs - engine), in diesel direct injection system wiring harness |
| F18 | Radiator fan thermo-switch |
| F95 | Thermo-switch for continued coolant circulation |
| G | Fuel gauge sender |
| G17 | Ambient temperature sensor |
| G22 | Speedometer sender |
| G32 | Coolant shortage indicator sender |
| T1p | Single connector, behind relay plate |
| T1q | Single connector, behind relay plate |
| V51 | Continued coolant circulation pump |
| 18 | Earth point, on engine block |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| *** | Only models up to September 2000 |
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