| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| E1 | Light switch |
| J59 | X contact relief relay |
| S162 | Fuse -1- (30), in fuse box/battery |
| S163 | Fuse -2- (30), in fuse box/battery |
| S176 | Fuse -4- (30), in fuse box/battery |
| S177 | Fuse -5- (30), in fuse box/battery |
| T2k | 2-pin connector, on engine |
| T4l | 4-pin connector, on engine |
| T6l | 6-pin connector, brown, in protective housing for connectors, on left in plenum chamber |
| 500 | Screw connection -1- (30), on relay plate |
| 501 | Screw connection -2- (30), on relay plate |
| 502 | Screw connection -1- (30a), on relay plate |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A32 | Positive (+) connection (30), in dash panel wiring harness |
| * | Only models with air conditioner |
| ** | Only models with additional heater |
| *** | Only models without additional heater |
| G79 | Accelerator pedal position sender |
| G185 | Accelerator pedal position sender -2- |
| J52 | Glow plugs relay |
| J248 | Diesel direct injection system control unit |
| J279 | Radiator fan V7 and V35 relay, 1st speed |
| J293 | Radiator fan control unit |
| J317 | Terminal 30 voltage supply relay |
| Q6 | Glow plugs - (engine) |
| T2j | 2-pin connector, in engine compartment |
| T6l | 6-pin connector, brown, in protective housing for connectors, on left in plenum chamber |
| T10d | 10-pin connector, green, in protective housing for connectors, on left in plenum chamber |
| T10h | 10-pin connector, blue, in protective housing for connectors, on left in plenum chamber |
| 504 | Screw connection -1- (87F), on relay plate |
| A104 | Positive (+) connection -2- (15), in dash panel wiring harness |
| * | Only models with air conditioner |
| ** | Only models with Climatronic |
| D | Ignition/starter switch |
| G2 | Coolant temperature sender |
| G28 | Engine speed sender |
| G62 | Coolant temperature sender |
| G71 | Intake manifold pressure sender |
| G72 | Intake manifold temperature sender |
| G80 | Needle lift sender |
| J248 | Diesel direct injection system control unit |
| S237 | Fuse in fuse box |
| T2t | 2-pin connector, on engine front |
| T3d | 3-pin connector, near intake manifold |
| T10d | 10-pin connector, green, in protective housing for connectors, on left in plenum chamber |
| T14a | 14-pin connector, in cable channel left |
| 200 | Earth connection (screening), in engine compartment wiring harness |
| A80 | Connection -1- (X), in dash panel wiring harness |
| G70 | Air mass meter |
| J104 | ABS with EDL control unit |
| J248 | Diesel direct injection system control unit |
| N18 | Exhaust gas recirculation valve |
| N75 | Charge pressure control solenoid valve |
| N108 | Commencement of injection valve |
| N239 | Intake manifold flap change-over valve |
| S234 | Fuse in fuse box |
| T6l | 6-pin connector, brown, in protective housing for connectors, on left in plenum chamber |
| T10d | 10-pin connector, green, in protective housing for connectors, on left in plenum chamber |
| T10y | 10-pin connector, on engine front |
| T14a | 14-pin connector, in cable channel left |
| A100 | Connection -2- (87), in dash panel wiring harness |
| E30 | Connection (87a), in engine 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 injection system) |
| J248 | Diesel direct injection system control unit |
| M21 | Brake and tail light bulb, left |
| S13 | Fuse in fuse box/relay plate |
| T10d | 10-pin connector, green, in protective housing for connectors, on left in plenum chamber |
| T10e | 10-pin connector, black, in protective housing for connectors, on left in plenum chamber |
| T10s | 10-pin connector, next to steering column right |
| A98 | Positive (+) connection -4- (30), in dash panel wiring harness |
| B131 | Connection (54), in interior wiring harness |
| W1 | Positive (+) connection -1- (54), in rear wiring harness |
| J248 | Diesel direct injection system control unit |
| J359 | Low heat output relay |
| J360 | High heat output relay |
| N79 | Heater element (crankcase breather) |
| Q7 | Coolant heating elements |
| T6l | 6-pin connector, brown, in protective housing for connectors, on left in plenum chamber |
| T6n | 6-pin connector |
| T9a | 9-pin connector |
| T10 | 10-pin connector, orange, in protective housing for connectors, on left in plenum chamber |
| 10 | Earth point, in plenum chamber |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| D50 | Positive (+) connection (30), in engine compartment wiring harness |
| D74 | Connection (86), in engine compartment wiring harness |
| D98 | Connection (glow plugs), in engine compartment wiring harness |
| D111 | Connection -9-, in engine compartment wiring harness |
| * | Only models with additional heater |
| F1 | Oil pressure switch |
| F4 | Reversing light switch |
| G22 | Speedometer sender |
| G266 | Oil level/oil temperature sender |
| H11 | Oil pressure warning buzzer |
| J285 | Control unit with display in dash panel insert |
| K2 | Alternator warning lamp |
| K3 | Oil pressure warning lamp |
| K28 | Coolant temperature warning lamp/coolant shortage warning lamp |
| K83 | Exhaust emissions warning lamp |
| S7 | Fuse in fuse box/relay plate |
| T10 | 10-pin connector, orange, in protective housing for connectors, on left in plenum chamber |
| T14a | 14-pin connector, in cable channel left |
| 10 | Earth point, in plenum chamber |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| B163 | Positive (+) connection -1- (15), in interior wiring harness |
| * | Only models with maintenance intermittent extension |
| ** | Wire W for self-diagnosis |
| *** | Only models without maintenance intermittent extension |
| E86 | Multi-function display call-up button |
| E109 | Multi-function display, memory switch |
| G1 | Fuel gauge |
| G3 | Coolant temperature gauge |
| G5 | Rev. counter |
| G21 | Speedometer |
| J119 | Multi-function display |
| J255 | Climatronic control unit |
| J285 | Control unit with display in dash panel insert |
| K29 | Glow period warning lamp |
| K105 | Reserve fuel warning lamp |
| T6d | 6-pin connector |
| T12d | 12-pin connector, on Climatronic |
| A27 | Connection (speed signal), in dash panel wiring harness |
| * | Only models with multi-function display |