| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| Q6 | Glow plugs - engine |
| S125 | Engine glow plug fuse, in protective housing for control units on left in engine compartment |
| T2b | 2-pin connector, blue, on right on engine block |
| T10b | 10-pin connector, black, on protective housing for control units on left in engine compartment |
| T10d | 10-pin connector, brown, on protective housing for control units on left in engine compartment |
| 1 | Earth strap, battery body |
| 2 | Earth strap, gearbox - body |
| 500 | Screw connection 1 (30), on relay plate |
| 504 | Screw connection 1 (87F), on relay plate |
| A17 | Connection (61), in dash panel wiring harness |
| A52 | Positive connection 2 (30), in dash panel wiring harness |
| F31 | Connection (engine glow plugs), in diesel direct injection system wiring harness |
| * | Only models with manual gearbox |
| D | Ignition/starter switch |
| F8 | Kickdown switch |
| F60 | Idling speed switch |
| G79 | Accelerator position sender |
| J52 | Glow plug relay |
| J248 | Diesel direct injection system control unit, in protective housing for control units |
| J317 | Terminal 30 voltage supply relay, in protective housing for control units |
| S102 | Engine control unit fuse, in protective housing for control units |
| T6a | 6-pin connector, on injection pump |
| T10b | 10-pin connector, black, on protective housing for control units on left in engine compartment |
| T10e | 10-pin connector, orange, on protective housing for control units on left in engine compartment |
| T15a | 15-pin connector, white, on protective housing for control units on left in engine compartment |
| T80 | 80-pin connector, on diesel direct injection system control unit |
| A2 | Positive connection (15), in dash panel wiring harness |
| A52 | Positive connection 2 (30), in dash panel wiring harness |
| F28 | Connection 3, in diesel direct injection system wiring harness |
| F33 | Positive connection (30), in diesel direct injection system wiring harness |
| * | Only models with manual gearbox |
| G28 | Engine speed sender |
| G71 | Intake manifold pressure sender |
| G72 | Intake manifold temperature sender |
| G80 | Needle lift sender |
| J248 | Diesel direct injection system control unit, in protective housing for control units |
| J255 | Climatronic control unit |
| T2 | 2-pin connector, brown, near needle lift sender |
| T3 | 3-pin connector, black, near engine speed sender |
| T10b | 10-pin connector, black, on protective housing for control units on left in engine compartment |
| T10d | 10-pin connector, brown, on protective housing for control units on left in engine compartment |
| T16b | 16-pin connector, on Climatronic control unit |
| T80 | 80-pin connector, on diesel direct injection system control unit |
| 12 | Earth point, on left in engine compartment |
| 156 | Earth connection, in diesel direct injection wiring harness |
| A45 | Connection (RPM signal), in dash panel wiring harness |
| D110 | Connection 8, in engine compartment wiring harness |
| G2 | Coolant temperature display sender |
| G62 | Coolant temperature sender |
| G81 | Fuel temperature sender |
| G149 | Modulating piston movement sender |
| J248 | Diesel direct injection system control unit, in protective housing for control units |
| N108 | Commencement of injection valve |
| N109 | Fuel shut-off valve |
| N146 | Metering adjuster |
| T3x | 3-pin connector |
| T8x | 8-pin connector, near injection pump |
| T80 | 80-pin connector, on diesel direct injection system control unit |
| F25 | Connection 1, in diesel direct injection system wiring harness |
| F26 | Connection 2, in diesel direct injection system wiring harness |
| G70 | Air mass meter |
| J248 | Diesel direct injection system control unit, in protective housing for control units |
| N18 | Exhaust gas recirculation valve |
| N75 | Charge pressure control solenoid valve |
| S231 | Fuse 31 on fuse holder |
| T10d | 10-pin connector, brown, on protective housing for control units on left in engine compartment |
| T10e | 10-pin connector, orange, on protective housing for control units on left in engine compartment |
| T80 | 80-pin connector, on diesel direct injection system control unit |
| A10 | Connection (glow period warning), in dash panel wiring harness |
| A15 | Positive connection (15), in instrument panel wiring harness |
| A60 | Connection (speed signal), in dash panel wiring harness |
| A70 | Connection (15a, fuse 231), in dash panel wiring harness |
| F25 | Connection 1, in diesel direct injection system wiring harness |
| --- | Only models with cruise control system (CCS) |
| * | Only models with manual gearbox |
| E45 | Cruise control system switch, position 0 = OFF in detent, position 1 = OFF with button, position 2 = ON, position 3 = RES |
| E227 | Cruise control system (CCS) SET button |
| F | Brake light switch |
| F36 | Clutch pedal switch |
| F47 | Cruise control system brake pedal switch, diesel direct injection system |
| J248 | Diesel direct injection system control unit, in protective housing for control units |
| S13 | Fuse 13 on fuse holder |
| T10 | 10-pin connector, black, next to steering column |
| T10d | 10-pin connector, brown, on protective housing for control units on left in engine compartment |
| T10h | 10-pin connector, blue, on protective housing for control units on left in engine compartment |
| T15a | 15-pin connector, white, on protective housing for control units on left in engine compartment |
| T80 | 80-pin connector, on diesel direct injection system control unit |
| A89 | Connection wire (brake light switch), in dash panel wiring harness |
| A130 | Connection (cruise control system), in dash panel wiring harness |
| --- | Only models with cruise control system (CCS) |
| * | Only models with manual gearbox |
| ** | Only models with automatic gearbox |
| E15 | Heated rear window switch |
| J248 | Diesel direct injection system control unit, in protective housing for control units |
| J255 | Climatronic control unit |
| J359 | Low heat output relay (373), in protective housing for control units |
| J360 | High heat output relay (370), in protective housing for control units |
| Q7 | Coolant glow plugs |
| S109 | Auxiliary heater fuse, in protective housing for control units |
| S143 | Coolant glow plug fuse 2, in protective housing for control units |
| T6h | 6-pin connector, black, on heated rear window switch |
| T15s | 15-pin connector, red, on protective housing for control units on left in engine compartment |
| T80 | 80-pin connector, on diesel direct injection system control unit |
| 501 | Screw connection 2 (30), on relay plate |
| A64 | Connection (30, speed boost), in dash panel wiring harness |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| * | Only models with manual gearbox |
| ** | Only models with automatic gearbox |
| F1 | Oil pressure switch |
| G | Fuel gauge sender |
| G6 | Fuel system pressurisation pump |
| G22 | Speedometer sender, inductive sender on left in gearbox |
| G32 | Coolant shortage indicator sender |
| G169 | Fuel gauge sender 2 (only all-wheel drive) |
| G237 | Fuel gauge sender 3 (only all-wheel drive) |
| J17 | Fuel pump relay, on 13 position additional relay carrier (only all-wheel drive), control number (214) |
| S228 | Fuse in fuse holder |
| T3d | 3-pin connector, front left in engine compartment |
| T4e | 4-pin connector |
| T6c | 6-pin connector, blue, left A-pillar coupling station |
| T10a | 10-pin connector, brown, left A-pillar coupling station |
| T10b | 10-pin connector, black, on protective housing for control units on left in engine compartment |
| 75 | Earth point, rear right pillar |
| 197 | Earth connection 4, in rear wiring harness |
| 269 | Earth connection (sender earth) 1, in dash panel wiring harness |
| 316 | Earth connection (sender earth 2) in engine wiring harness |
| A86 | Connection (50a), in dash panel wiring harness |
| F120 | Anti-theft alarm system contact switch, on engine compartment lock |
| G266 | Oil level and oil temperature sender |
| J285 | Display control unit, in dash panel insert |
| K38 | Oil level warning lamp |
| S5 | Fuse 5 on fuse holder |
| T10a | 10-pin connector, brown, left A-pillar coupling station |
| T10d | 10-pin connector, brown, on protective housing for control units on left in engine compartment |
| T32a | 32-pin connector, blue, on dash panel insert |
| T32b | 32-pin connector, green, on dash panel insert |
| 44 | Earth point, lower part of left A-pillar |
| 86 | Earth connection 1, in rear wiring harness |
| A74 | Connection (15a, fuse 5), in dash panel wiring harness |
| W37 | Connection (ATA), in floor wiring harness |
| G1 | Fuel gauge |
| G3 | Coolant temperature gauge |
| G5 | Rev. counter |
| H11 | Oil pressure warning buzzer |
| J285 | Display control unit, in dash panel insert |
| K2 | Alternator warning lamp |
| K3 | Oil pressure warning lamp |
| K28 | Coolant temperature/coolant shortage warning lamp |
| K31 | Cruise control system warning lamp |
| K29 | Glow period warning lamp |
| L75 | Digital display illumination bulb |
| T32a | 32-pin connector, blue, on dash panel insert |
| T32b | 32-pin connector, green, on dash panel insert |
| Y4 | Odometer display |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
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