| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| J226 | Starter inhibitor and reversing light relay |
| T1f | 1-pin connector, near starter |
| TV23 | Push-in bridge |
| 1 | Earth strap, battery - body |
| 2 | Earth strap, gearbox - body |
| 32 | Earth point, behind dash panel, left |
| 296 | Earth connection -11-, in interior wiring harness |
| B170 | Positive (+) connection -2- (30), in interior wiring harness |
| B171 | Positive (+) connection -3- (30), in interior wiring harness |
| B177 | Connection (61), in interior wiring harness |
| * | Only models with manual gearbox |
| --- | Only models with automatic gearbox |
| D | Ignition/starter switch |
| E19 | Parking light switch |
| J59 | X contact relief relay |
| J226 | Starter inhibitor and reversing light relay |
| S102 | Engine control unit fuse, No. 13 in fuse box |
| S206 | Fuse -3- (30), No. 14 in fuse box |
| S215 | Fuse (SU), No. 25 in fuse box 8 |
| S216 | Fuses (50), No. 26 in fuse box |
| T10 | 10-pin connector, on column switch trim |
| B138 | Positive (+) connection (X), in interior wiring harness |
| B158 | Connection (S), in interior wiring harness |
| B169 | Positive (+) connection -1- (30), in interior wiring harness |
| B172 | Positive (+) connection -4- (30), in interior wiring harness |
| B201 | Positive (+) connection -4- (X), in interior wiring harness |
| * | Only models with manual gearbox |
| --- | Only models with automatic gearbox |
| F8 | Kick-down switch |
| F60 | Idling switch |
| G79 | Accelerator pedal position sender |
| J248 | Diesel direct injection system control unit, behind the dash panel, left |
| J317 | Terminal 30 voltage supply relay |
| N18 | Exhaust gas recirculation valve |
| N75 | Charge pressure control solenoid valve |
| N108 | Commencement of injection valve |
| T6c | 6-pin connector, behind the multi-function unit |
| T10b | 10-pin connector, near diesel injection pump |
| T68 | 68-pin connector |
| F25 | Connection -1-, in diesel direct injection system wiring harness |
| G28 | Engine speed sender |
| G72 | Intake manifold temperature sender |
| G80 | Needle lift sender |
| J248 | Diesel direct injection system control unit, behind the dash panel, left |
| J362 | Immobilizer control unit, behind the dash panel, left |
| T2d | 2-pin connector, near diesel injection pump |
| T3m | 3-pin connector, near engine speed sender |
| T8b | 8-pin connector |
| T16 | 16-pin connector, behind ashtray housing cover, self-diagnosis connection |
| T68 | 68-pin connector |
| 32 | Earth point, behind dash panel, left |
| 156 | Earth connection, in diesel direct injection wiring harness |
| 220 | Earth connection (sender earth), in engine wiring harness |
| B159 | Connection (diagnostic), in interior wiring harness |
| ** | Vehicles from January 1999 |
| -••- | Vehicles up to December 1998 |
| G2 | Coolant temperature sender |
| G62 | Coolant temperature sender |
| G70 | Air mass meter |
| G81 | Fuel temperature sender |
| G149 | Modulating piston movement sender |
| J248 | Diesel direct injection system control unit, behind the dash panel, left |
| J255 | Climatronic control unit |
| J397 | Radiator fan run-on relay, control number (404) |
| N146 | Metering adjuster |
| T5 | 5-pin connector |
| T10b | 10-pin connector, near diesel injection pump |
| T24 | 24-pin connector, on engine left |
| T28c | 28-pin connector, red, on climatronic control unit |
| T68 | 68-pin connector |
| 18 | Earth point, on engine left |
| B178 | Connection (speed signal), in interior wiring harness |
| D157 | Connection (air conditioner, on), in engine compartment wiring harness |
| F26 | Connection -2-, in diesel direct injection system wiring harness |
| E45 | Cruise control system switch |
| E227 | Cruise control system (CCS) button (Set) |
| F | Brake light switch |
| F36 | Clutch pedal switch |
| F47 | Cruise control system brake pedal switch/diesel direct inj. system |
| J217 | Automatic gearbox control unit, near battery |
| J248 | Diesel direct injection system control unit, behind the dash panel, left |
| T6d | 6-pin connector, behind steering column switch trim |
| T8d | 8-pin connector, near battery |
| T10c | 10-pin connector, near battery |
| T68 | 68-pin connector |
| T68a | 68-pin connector, on automatic gearbox control unit |
| 220 | Earth connection (sender earth), in engine wiring harness |
| B131 | Connection (54), in interior wiring harness |
| D90 | Connection (engine speed signal), in engine compartment wiring harness |
| * | Only models with manual gearbox |
| --- | Only models with automatic gearbox |
| J52 | Glow plug relay |
| J234 | Airbag control unit, behind console |
| J248 | Diesel direct injection system control unit, behind the dash panel, left |
| J491 | Fuel shut-off control unit (Crash) |
| N109 | Fuel shut-off valve |
| Q6 | Glow plugs - (engine) |
| S125 | Coolant heater element fuse (engine), the lower relay carrier of the multi-funcion unit |
| T4f | 4-pin connector, above multi-funcion unit entwined in wiring harness |
| T10b | 10-pin connector, near diesel injection pump |
| T24 | 24-pin connector, on engine left |
| T50 | 50-pin connector, on airbag control unit |
| T68 | 68-pin connector |
| 32 | Earth point, behind dash panel, left |
| 249 | Earth connection -2-, in interior wiring harness |
| B228 | Connection (crash signal), in interior wiring harness |
| F31 | Connection (glow plugs - engine), in diesel direct injection system wiring harness |
| F1 | Oil pressure switch |
| F22 | Oil pressure switch (0.3 bar) |
| G22 | Speedometer sender (Hall sender on gearbox) |
| N79 | Heater element (crankcase breather) |
| S200 | Fuse -2- (15), No. 3 in fuse box |
| S201 | Fuse -3- (15), No. 4 in fuse box |
| S203 | Fuse -5- (15), No. 32 in fuse box |
| T24 | 24-pin connector, on engine left |
| 18 | Earth point, on engine left |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| B135 | Connection -1- (15a), in interior wiring harness |
| B163 | Positive (+) connection -1- (15), in interior wiring harness |
| B235 | Positive (+) connection -4- (15a), in interior wiring harness |
| D52 | Positive (+) connection (15a), in engine compartment wiring harness |
| * | Only models with manual gearbox |
| ** | Vehicles from January 1999 |
| -••- | Vehicles up to December 1998 |
| G1 | Fuel gauge |
| G3 | Coolant temperature gauge |
| G8 | Oil temperature sender |
| G17 | Ambient temperature sensor |
| H11 | Oil pressure warning buzzer |
| J285 | Control unit with display in dash panel insert |
| K3 | Oil pressure warning lamp |
| K28 | Coolant temperature/coolant shortage warning lamp |
| L75 | Digital display illumination |
| T24 | 24-pin connector, on engine left |
| T28 | 28-pin connector |
| T28a | 28-pin connector |
| * | Only models with manual gearbox |
| --- | Only models with automatic gearbox |
| G | Fuel gauge sender |
| G5 | Rev. counter |
| G21 | Speedometer |
| G32 | Coolant shortage indicator sender |
| J285 | Control unit with display in dash panel insert |
| K2 | Alternator warning lamp |
| K29 | Glow period warning lamp |
| S156 | Brake light fuse, No. 20 in fuse box |
| S208 | Fuse -5- (30), No. 19 in fuse box |
| T24 | 24-pin connector, on engine left |
| T28 | 28-pin connector |
| Y4 | Odometer display |
| 18 | Earth point, on engine left |
| 285 | Earth connection -7-, in interior wiring harness |
| B156 | Positive (+) connection (30a), in interior wiring harness |
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