| D | Ignition/starter switch |
| E20 | Switches and instruments lighting regulator |
| E159 | Fresh air/air recirculation flap switch |
| F268 | Heater element contact switch for additional heater |
| J248 | Diesel direct injection system control unit |
| K114 | Fresh air/air recirculation warning lamp |
| L16 | Fresh air controls illumination bulb |
| SB26 | Fuse -26- on fuse holder |
| T4 | 4-pin connector, black, in centre behind dash panel |
| T8g | 8-pin connector, in centre behind dash panel |
| T10u | 10-pin connector, in centre behind dash panel |
| T121 | 121-pin connector |
| V2 | Fresh air blower |
| V154 | Fresh air/air recirculation flap control motor |
| 45 | Earth point, in centre behind dash panel |
| 162 | Earth connection, in blower motor wiring harness |
| B145 | Positive connection (58b), in interior wiring harness |
| B149 | Positive connection -2- (15a), in interior wiring harness |
| B165 | Positive connection -2- (15), in interior wiring harness |
| D52 | Positive connection (15a), in engine compartment wiring harness |
| L66 | Positive connection (15a), in engine compartment wiring harness |
| * | Only engine codes ANY, AYZ |
| E9 | Fresh air blower switch |
| E35 | Air conditioning system switch |
| G346 | Compressor switch-off temperature sender |
| J59 | X contact relief relay |
| J537 | 4LV control unit |
| J248 | Diesel direct injection system control unit |
| J293 | Radiator fan control unit, on left in front of engine compartment |
| J687 | 4MV control unit (injection system) |
| K84 | Air conditioning system warning lamp |
| N24 | Fresh air blower series resistor with overheating fuse |
| SB49 | Fuse -49- on fuse holder |
| T4 | 4-pin connector, behind dash panel |
| T4b | 4-pin connector |
| T4n | 4-pin connector, black, on fresh air blower series resistor |
| T6f | 6-pin connector, behind dash panel |
| T8g | 8-pin connector, behind dash panel |
| T10u | 10-pin connector, behind dash panel |
| T14b | 14-pin connector, black |
| T121 | 121-pin connector, on engine control unit |
| B138 | Positive connection (X), in interior wiring harness |
| D157 | Connection (air conditioner, on), in engine compartment wiring harness |
| L45 | Connection, in air conditioner controls wiring harness |
| L66 | Connection, in heater blower wiring harness |
| * | Applies only to engine codes ANY, AYZ, AMF |
| ** | Applies only engine codes APE, AQQ, AUA, AUB |
| *** | Applies only to engine code BBY |
| J220 | Motronic control unit |
| J248 | Diesel direct injection system control unit |
| J293 | Radiator fan control unit, on left in front of engine compartment |
| J537 | 4LV control unit |
| J687 | 4MV control unit (injection system) |
| N25 | Air conditioner magnetic coupling |
| T3a | 3-pin connector, black, on left in front of engine compartment |
| T5h | 5-pin connector, black |
| T4k | 4-pin connector, black |
| T14b | 14-pin connector, black |
| T80 | 80-pin connector, on engine control unit |
| T121 | 121-pin connector, on engine control unit |
| V35 | Radiator fan |
| 10 | Earth point, in plenum chamber |
| 124 | Earth connection, in right engine compartment wiring harness |
| 201 | Earth connection -5-, in engine compartment wiring harness |
| 209 | Earth connection -6-, in engine compartment wiring harness |
| D135 | Connection (1st fan speed), in engine/headlight wiring harness |
| * | Applies only to engine codes ANY, AYZ, AMF |
| ** | Applies only engine codes APE, AQQ, AUA, AUB |
| *** | Applies only to engine codes ALD, ANV, AUC, AUD |
| **** | Applies only to engine code BBY |
| A | Battery |
| F18 | Radiator fan thermal switch |
| G65 | High pressure sender |
| J220 | Motronic control unit |
| J293 | Radiator fan control unit, on left in front of engine compartment |
| J537 | 4LV control unit |
| J687 | 4MV control unit (injection system) |
| SA4 | Fuse -4- (30), in battery fuse holder |
| SA7 | Fuse -7- (30), in battery fuse holder |
| SA8 | Fuse -8- (30) in battery fuse holder |
| T3c | 3-pin connector, black, on high pressure sender |
| T4g | 4-pin connector, black, on battery fuse holder |
| T4k | 4-pin connector, black |
| T14b | 14-pin connector, black |
| T80 | 80-pin connector, on engine control unit |
| T121 | 121-pin connector, on engine control unit |
| 124 | Earth connection, in right engine compartment wiring harness |
| D61 | Connection (air conditioner), in engine compartment wiring harness |
| D135 | Connection -1- (15a), in interior wiring harness |
| K20 | Positive connection -1- (30), in radiator fan wiring harness |
| * | Applies only to engine codes ALD, ANV, AUC, AUD |
| ** | Applies only to engine codes APE, AQQ, AUA, AUB |
| *** | Applies only to engine code BBY |
| **** | Applies only to engine codes ANY, AYZ, AMF |
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