| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| F18 | Radiator fan thermo-switch |
| S162 | Fuse -1- (30), in fuse box/battery |
| S163 | Fuse -2- (30), in fuse box/battery |
| S164 | Fuse -3- (30), in fuse box/battery |
| S176 | Fuse -4- (30), in battery fuse box |
| S179 | Fuse -7- (30), in battery fuse box |
| T3c | 3-pin connector, black, on radiator fan |
| T10d | 10-pin connector, red, connector point under relay carrier |
| T10s | 10-pin connector, light green, connector point under relay carrier |
| T14b | 14-pin connector, in engine compartment, left |
| V7 | Radiator fan |
| 12 | Earth point, in engine compartment, left |
| 500 | Screw connection -1- (30), on relay plate |
| 502 | Screw connection -1- (30a), on relay plate |
| A32 | Positive (+) connection (30), in dash panel wiring harness |
| * | Only models without air conditioner |
| F8 | Kick-down switch |
| F60 | Idling switch |
| G79 | Accelerator pedal position sender |
| J17 | Fuel pump relay |
| J248 | Diesel direct injection system control unit, in plenum chamber, centre |
| J317 | Terminal 30 voltage supply relay, on relay carrier |
| SB23 | Fuse -23- in fuse box |
| SB37 | Fuse -37- in fuse box |
| SB40 | Fuse -37- in fuse box |
| T6c | 6-pin connector, on left under dash panel |
| T10a | 10-pin connector, green, connector point under relay carrier |
| T10e | 10-pin connector, pink, connector point under relay carrier |
| T121 | 121-pin connector, on diesel direct injection system control unit |
| A32 | Positive (+) connection (30), in dash panel wiring harness |
| F36 | Connection (87a), in diesel direct injection system wiring harness |
| F25 | Connection (1), in diesel direct injection wiring harness |
| * | Not with all levels of equipment |
| G2 | Coolant temperature sender |
| G28 | Engine speed sender |
| G62 | Coolant temperature sender |
| G71 | Intake manifold pressure sender |
| G72 | Intake manifold temperature sender |
| J248 | Diesel direct injection system control unit, in plenum chamber, centre |
| J362 | Immobilizer control unit, behind dash panel, left |
| T3g | 3-pin connector, on engine front |
| T10 | 10-pin connector, white, connector point under relay carrier |
| T10a | 10-pin connector, green, connector point under relay carrier |
| T14b | 14-pin connector, in engine compartment, left |
| T121 | 121-pin connector, on diesel direct injection system control unit |
| 10 | Earth point, in plenum chamber |
| F27 | Connection (screening), in diesel direct injection system wiring harness |
| * | For additional heater connections 1 and 4 changed |
| G40 | Hall sender (for camshaft position) |
| J248 | Diesel direct injection system control unit, in engine compartment, left |
| N240 | Unit injector solenoid valve, No. 1 cyl. |
| N241 | Unit injector solenoid valve, No. 2 cyl. |
| N242 | Unit injector solenoid valve, No. 3 cyl. |
| T3l | 3-pin connector, on engine front |
| T8l | 8-pin connector, in engine compartment, left |
| T121 | 121-pin connector, on diesel direct injection system control unit |
| D101 | Connection -1-, in engine compartment wiring harness |
| F26 | Connection -2-, in diesel direct injection system wiring harness |
| G70 | Air mass meter |
| J248 | Diesel direct injection system control unit, in engine compartment, left |
| N18 | Exhaust gas recirculation valve |
| N75 | Charge pressure control solenoid valve |
| N239 | Intake manifold flap change-over valve |
| T5 | 5-pin connector |
| T10a | 10-pin connector, green, connector point under relay carrier |
| T10c | 10-pin connector, blue, connector point under relay carrier |
| T121 | 121-pin connector, on diesel direct injection system control unit |
| F26 | Connection -2-, in diesel direct injection system wiring harness |
| J248 | Diesel direct injection system control unit, in engine compartment, left |
| J359 | Low heat output relay, on relay carrier |
| J360 | High heat output relay, on relay carrier |
| S276 | Heater element fuse -1- |
| S277 | Heater element fuse -2- |
| S278 | Heater element fuse -3- |
| Q7 | Coolant heating elements |
| T121 | 121-pin connector, on diesel direct injection system control unit |
| A1 | Positive (+) connection (30a), in dash panel wiring harness |
| D98 | Connection (glow plugs), in engine compartment wiring harness |
| F26 | Connection -2-, in diesel direct injection system wiring harness |
| G81 | Fuel temperature sender |
| J104 | ABS/ABS with EDL control unit |
| J248 | Diesel direct injection system control unit, in plenum chamber, centre |
| J293 | Radiator fan control unit |
| N79 | Heater element (crankcase breather) |
| SB30 | Fuse -30- in relay plate fuse box |
| T10 | 10-pin connector, white, connector point under relay carrier |
| T10g | 10-pin connector, brown, connector point under relay carrier |
| T10s | 10-pin connector, light green, connector point under relay carrier |
| T121 | 121-pin connector, on diesel direct injection system control unit |
| 12 | Earth point, in engine compartment, left |
| 119 | Earth connection -1-, in headlight wiring harness |
| D159 | Connection (high bus), in engine compartment wiring harness |
| D160 | Connection (low bus), in engine compartment wiring harness |
| L2 | Connection, in air conditioner wiring harness |
| * | Only models with manual control air conditioner |
| ** | Only models with Climatronic |
| F | Brake light switch |
| F36 | Clutch pedal switch |
| F47 | Brake pedal switch for diesel direct inj. system |
| J234 | Airbag control unit |
| J248 | Diesel direct injection system control unit, in engine compartment, left |
| J491 | Fuel shut-off control unit (Crash) |
| SB15 | Fuse -15- in fuse box |
| SB24 | Fuse -24- in fuse box |
| SB32 | Fuse -32- in fuse box |
| T10 | 10-pin connector, white, connector point under relay carrier |
| T10b | 10-pin connector, black, connector point under relay carrier |
| T10d | 10-pin connector, red, connector point under relay carrier |
| T10g | 10-pin connector, brown, connector point under relay carrier |
| T10x | 10-pin connector, yellow, connector point under relay carrier |
| T121 | 121-pin connector, on diesel direct injection system control unit |
| 76 | Earth point, near selector mechanism |
| A27 | Connection (speed signal), in dash panel wiring harness |
| A89 | Connection -2- (54), in dash panel wiring harness |
| B102 | Earth connection, in front left interior wiring harness |
| E43 | Connection (87), in injection system wiring harness |
| D | Ignition/starter switch |
| F1 | Oil pressure switch |
| G22 | Speedometer sender (Hall sender, on gearbox) |
| J52 | Glow plug relay, on relay carrier |
| Q6 | Glow plugs - (engine) |
| SB28 | Fuse -28- in fuse box |
| T10b | 10-pin connector, black, connector point under relay carrier |
| T10d | 10-pin connector, red, connector point under relay carrier |
| T10g | 10-pin connector, brown, connector point under relay carrier |
| T14b | 14-pin connector, in engine compartment, left |
| A15 | Positive (+) connection (15), in instruments wiring harness |
| B149 | Positive (+) connection -2- (15a), in interior wiring harness |
| G | Fuel gauge sender |
| G6 | Fuel pump (pre-supply pump) |
| G32 | Coolant shortage indicator sender |
| H3 | Warning buzzer |
| J285 | Control unit with display in dash panel insert |
| K3 | Oil pressure warning lamp |
| K28 | Coolant temperature/coolant shortage warning lamp |
| T10b | 10-pin connector, black, connector point under relay carrier |
| T10d | 10-pin connector, red, connector point under relay carrier |
| T10e | 10-pin connector, pink, connector point under relay carrier |
| T32 | 32-pin connector, blue, on dash panel insert |
| 12 | Earth point, in engine compartment, left |
| 51 | Earth point, in engine compartment, left |
| 120 | Earth connection -2-, in headlight wiring harness |
| * | Not with all levels of equipment |
| G1 | Fuel gauge |
| G3 | Coolant temperature gauge |
| G5 | Rev. counter |
| G21 | Speedometer |
| J285 | Control unit with display in dash panel insert |
| J533 | Data bus diagnostic interface, in dash panel insert |
| K2 | Alternator warning lamp |
| K29 | Glow period warning lamp |
| K105 | Reserve fuel warning lamp |
| T16 | 16-pin connector, self-diagnosis connection |
| T32 | 32-pin connector, blue, on dash panel insert |
| T32a | 32-pin connector, green, on dash panel insert |
| A27 | Connection (speed signal), in dash panel wiring harness |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| * | Engine speed signal from engine control unit |
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