| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| F125 | Multi-function switch |
| J207 | Starter inhibitor relay |
| J217 | Automatic gearbox control unit |
| J226 | Starter inhibitor and reversing light relay |
| S205 | Fuse -2- (30) |
| T1h | Single connector, black, in engine compartment, right |
| T2cl | 2-pin connector, black, on alternator |
| T9 | 9-pin connector, brown, at starter inhibitor relay |
| T10o | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| T10p | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T17m | 17-pin connector, blue, connector point, A pillar, right |
| 1 | Earth strap, battery - body |
| A17 | Connection (61), in dash panel wiring harness |
| A41 | Positive (+) connection (50), in dash panel wiring harness |
| * | Models with manual gearbox |
| ** | Models with automatic gearbox 01V |
| *** | Models with automatic gearbox: multitronic® 01J |
| D | Ignition/starter switch |
| G266 | Oil level/oil temperature sender |
| J52 | Glow plug relay |
| Q6 | Glow plugs - engine |
| S5 | Fuse in fuse box |
| S125 | Fuse for glow plugs |
| S189 | Fuse 2 for glow plugs |
| S231 | Fuse 31 in fuse box |
| T10n | 10-pin connector, orange, connector point, electronics box, plenum chamber |
| T10o | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| T10p | 10-pin connector, black, connector point, electronics box, plenum chamber |
| 13 | Earth point, in engine compartment, right |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A20 | Connection (15a), in dash panel wiring harness |
| A38 | Positive (+) connection -2- (15a), in dash panel wiring harness |
| D98 | Connection (glow plugs), in engine compartment wiring harness |
| D177 | Connection -2- (glow plugs), in engine compartment wiring harness |
| F35 | Connection -4-, in diesel direct injection system wiring harness |
| J217 | Automatic gearbox control unit |
| J248 | Diesel direct injection system control unit |
| J322 | Diesel direct injection system relay |
| N18 | Exhaust gas recirculation valve |
| N75 | Charge pressure control solenoid valve |
| S102 | Engine control unit fuse |
| S199 | Fuse -1- (15) |
| T10n | 10-pin connector, orange, connector point, electronics box, plenum chamber |
| T17i | 17-pin connector, white, connector point, electronics box, plenum chamber |
| T17k | 17-pin connector, red, connector point, electronics box, plenum chamber |
| A32 | Positive (+) connection (30), in dash panel wiring harness |
| F25 | Connection -1-, in diesel direct injection system wiring harness |
| F28 | Connection -3-, in diesel direct injection system wiring harness |
| F33 | Positive (+) connection (30), in diesel direct injection system wiring harness |
| F36 | Connection (87a), in diesel direct injection system wiring harness |
| * | Models with automatic gearbox: multitronic® 01J |
| E87 | Air conditioning system operating and display unit |
| F4 | Reversing light switch |
| G42 | Intake air temperature sender |
| G70 | Air mass meter |
| J217 | Automatic gearbox control unit |
| J248 | Diesel direct injection system control unit |
| N144 | Electro/hydraulic engine mounting solenoid valve, left |
| N145 | Electro/hydraulic engine mounting solenoid valve, right |
| N280 | Air conditioning system compressor regulating valve |
| T10n | 10-pin connector, orange, connector point, electronics box, plenum chamber |
| T10o | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| T10p | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T20d | 20-pin connector, black, on automatic gearbox control unit |
| D52 | Positive (+) connection (15a), in engine compartment wiring harness |
| F25 | Connection -1-, in diesel direct injection system wiring harness |
| F26 | Connection -2-, in diesel direct injection system wiring harness |
| * | Models with manual gearbox |
| ** | Models with automatic gearbox 01V |
| *** | Models with automatic gearbox: multitronic® 01J |
| # | Up to model year 2003 |
| ## | From model year 2004 onwards |
| E3 | Hazard warning light switch |
| E45 | Cruise control system switch |
| F | Brake light switch |
| F36 | Clutch pedal switch |
| F47 | Brake pedal switch |
| J104 | ABS control unit |
| J234 | Airbag control unit |
| J248 | Diesel direct injection system control unit |
| S13 | Fuse in fuse box |
| T10q | 10-pin connector, black, on cruise control system switch |
| T17f | 17-pin connector, black, in 8-point relay carrier, behind driver's storage compartment |
| T17i | 17-pin connector, white, connector point, electronics box, plenum chamber |
| T17k | 17-pin connector, red, connector point, electronics box, plenum chamber |
| A16 | Connection (cruise control system), in dash panel wiring harness |
| A18 | Connection (54), in dash panel wiring harness |
| A52 | Positive (+) connection 2 (30), in dash panel wiring harness |
| A99 | Connection 1 (87), in dash panel wiring harness |
| A125 | Connection (crash signal), in dash panel wiring harness |
| * | Models with cruise control system |
| ** | Models with manual gearbox |
| F8 | Kick-down switch |
| F60 | Idling switch |
| G2 | Coolant temperature sender |
| G8 | Oil temperature sender |
| G62 | Coolant temperature sender |
| G79 | Accelerator pedal position sender |
| J217 | Automatic gearbox control unit |
| J248 | Diesel direct injection system control unit |
| J399 | Injection pump control unit |
| T17i | 17-pin connector, white, connector point, electronics box, plenum chamber |
| T17k | 17-pin connector, red, connector point, electronics box, plenum chamber |
| T20d | 20-pin connector, black, on automatic gearbox control unit |
| 85 | Earth connection 1, in engine compartment wiring harness |
| 220 | Earth connection (sender earth), in engine wiring harness |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| D159 | Positive (+) connection (high bus), in engine compartment wiring harness |
| D160 | Positive (+) connection (low bus), in engine compartment wiring harness |
| • | CAN bus (data wire) |
| * | Models with manual gearbox and automatic gearbox 01V |
| ** | Models with automatic gearbox: multitronic® 01J |
| # | Up to model year 2003 |
| ## | From model year 2004 onwards |
| G28 | Engine speed sender |
| G71 | Intake manifold pressure sender |
| G80 | Needle lift sender |
| G210 | Low fuel level sender |
| J248 | Diesel direct injection system control unit |
| T2cg | 2-pin connector, brown, connector point, A pillar, right |
| T10n | 10-pin connector, orange, connector point, electronics box, plenum chamber |
| 85 | Earth connection 1, in engine compartment wiring harness |
| * | Models with manual gearbox and automatic gearbox 01J |
| ** | Models with automatic gearbox 01V |
| # | Applies to 132 kW engine only |
| J17 | Fuel pump relay |
| J217 | Automatic gearbox control unit |
| J248 | Diesel direct injection system control unit |
| S228 | Fuse 28 in fuse box |
| T10n | 10-pin connector, orange, connector point, electronics box, plenum chamber |
| T10o | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| T10p | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T20d | 20-pin connector, black, on automatic gearbox control unit |
| V60 | Throttle valve positioner |
| V157 | Intake manifold flap motor |
| 85 | Earth connection 1, in engine compartment wiring harness |
| * | Models with automatic gearbox: multitronic® 01J |
| ** | Engine codes AKE, AYM, BFC |
| *** | Engine codes BCZ, BDG, BAU, BDH (with roller rocker finger) |
| # | Up to model year 2003 |
| ## | From model year 2004 onwards |
| J248 | Diesel direct injection system control unit |
| J359 | Low heat output relay |
| J360 | High heat output relay |
| J364 | Additional heater control unit |
| Q8 | Glow plug with flame monitor |
| S276 | Heater element fuse -1- |
| S277 | Heater element fuse -2- |
| T6z | 6-pin connector, on auxiliary heater control unit |
| T10n | 10-pin connector, orange, connector point, electronics box, plenum chamber |
| T17k | 17-pin connector, red, connector point, electronics box, plenum chamber |
| T17o | 17-pin connector, white, connector point, A pillar, left |
| V6 | Combustion air blower |
| V54 | Metering pump |
| Z35 | Additional heating heater element |
| 146 | Earth connection -1-, in auxiliary heater wiring harness |
| 156 | Earth connection, in diesel direct injection wiring harness |
| A57 | Connection (30), in dash panel wiring harness |
| F32 | Connection (additional heater), in diesel direct injection system wiring harness |
| L35 | Connection -3-, in heater wiring harness |
| * | Does not apply to models with auxiliary heater |
| ** | Models with auxiliary heater |
| E87 | Air conditioning system operating and display unit |
| F18 | Radiator fan thermo-switch |
| F54 | Radiator fan thermo-switch |
| J26 | Radiator fan relay |
| J101 | Radiator fan 2nd speed relay |
| J138 | Radiator fan run-on relay |
| N39 | Radiator fan series resistor |
| S42 | Radiator fan single fuse |
| S142 | Radiator fan control unit fuse |
| T14a | 14-pin connector, black, in engine compartment, front left |
| T17h | 17-pin connector, brown, connector point, A pillar, left |
| V7 | Radiator fan |
| 44 | Earth point, lower part of left A pillar |
| 156 | Earth connection, in diesel direct injection wiring harness |
| 194 | Earth connection -2-, in radiator fan wiring harness |
| D168 | Connection (radiator fan stage II), in engine compartment wiring harness |
| G | Fuel gauge sender |
| G1 | Fuel gauge |
| G6 | Fuel pump (pre-supply pump) |
| G169 | Fuel gauge sender -2- |
| G237 | Fuel gauge sender -3- |
| J285 | Control unit with display in dash panel insert |
| K2 | Alternator warning lamp |
| K29 | Glow period warning lamp |
| T10f | 10-pin connector, brown, connector point, A pillar, left |
| T10ba | 10-pin connector, blue, connector point, A pillar, left |
| T16a | 16-pin connector, diagnosis connection |
| T32 | 32-pin connector, blue, on dash panel insert |
| T32a | 32-pin connector, green, on dash panel insert |
| 86 | Earth connection -1-, in rear wiring harness |
| 269 | Earth connection (sender earth) -1-, in dash panel wiring harness |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| * | Models with front-wheel drive |
| ** | Models with four-wheel drive |
| *** | Wiring in fuel tank |
| # | Sender earth output |
| F1 | Oil pressure switch |
| F66 | Coolant shortage indicator switch |
| G3 | Coolant temperature gauge |
| G5 | Rev. counter |
| G21 | Speedometer |
| G22 | Speedometer sender (Hall sender, on gearbox) |
| J285 | Control unit with display in dash panel insert |
| K28 | Coolant temperature/coolant shortage warning lamp |
| T10p | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T32 | 32-pin connector, blue, on dash panel insert |
| T32a | 32-pin connector, green, on dash panel insert |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| 220 | Earth connection (sender earth), in engine wiring harness |
| 269 | Earth connection (sender earth) -1-, in dash panel wiring harness |
| A108 | Connection (speed signal), in dash panel wiring harness |
| • | CAN bus (data wire) |
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