A | Battery |
B | Starter |
C | Alternator |
C1 | Voltage regulator |
D | Ignition/starter switch |
J4 | Dual tone horn relay |
J59 | X-contact relief relay |
J226 | Starter inhibitor and reversing light relay, on the 13 position additional relay carrier |
S162 | Fuse 1 (30) in fuse holder on battery |
S163 | Fuse 2 (30) in fuse holder on battery |
S176 | Fuse 4 (30) in fuse holder on battery |
S177 | Fuse 5 (30) in fuse holder on battery |
T2e | 2-pin connector, near starter (in models without air conditioning system) |
T4 | 4-pin connector, near starter (in models with air conditioning system) |
T6 | 6-pin connector, brown, in connector protective housing, on left in plenum chamber |
42 | Earth point, next to steering column |
49 | Earth point, on steering column |
135 | Earth connection 2, in dash panel wiring harness |
500 | Screw connection 1 (30), on relay plate |
502 | Screw connection (30a), on relay plate |
* | only models with manual gearbox |
--- | models with automatic gearbox only |
** | only models with glow plugs coolant heating |
D | Ignition/starter switch |
J248 | Diesel direct injection system control unit, in centre plenum chamber |
Q6 | Glow plugs, engine |
S229 | Fuse 29 in fuse holder |
S237 | Fuse 37 in fuse holder |
T2 | 2-pin connector, in cable channel left in engine compartment |
T6 | 6-pin connector, brown, in connector protective housing, on left in plenum chamber |
T14a | 14-pin connector, near battery |
T121 | 121-pin connector |
501 | Screw connection 2 (30), on relay plate |
504 | Screw connection (87F), on relay plate |
A2 | Positive connection (15), in dash panel wiring harness |
A32 | Positive connection (30), in dash panel wiring harness |
A80 | Connection 1 (X), in dash panel wiring harness |
A98 | Positive connection 4 (30), in dash panel wiring harness |
A104 | Positive connection 2 (15), in dash panel wiring harness |
F8 | Kick-down switch |
F60 | Idling speed switch |
G28 | Engine speed sender |
G79 | Accelerator position sender |
J52 | Glow plug relay |
J248 | Diesel direct injection system control unit, in centre plenum chamber |
J317 | Terminal 30 voltage supply relay, above the central electrics |
T3 | 3-pin connector, on front of engine |
T6 | 6-pin connector, brown, in connector protective housing, on left in plenum chamber |
T6a | 6-pin connector |
T10h | 10-pin connector, blue, in connector protective housing, on left in plenum chamber |
T121 | 121-pin connector |
200 | Earth connection (screening), in engine compartment wiring harness |
A98 | Positive connection 4 (30), in dash panel wiring harness |
D74 | Connection (86), in engine compartment wiring harness |
* | from August 2004 |
*** | up to July 2004 |
G2 | Coolant temperature display sender |
G62 | Coolant temperature sender |
G71 | Intake manifold pressure sender |
G72 | Intake manifold temperature sender |
J248 | Diesel direct injection system control unit, in centre plenum chamber |
N79 | Heater element for crankcase breather |
T10 | 10-pin connector, orange, in connector protective housing, on left in plenum chamber |
T10f | 10-pin connector, in front engine compartment |
T10w | 10-pin connector, white, in connector protective housing, on left in plenum chamber |
T14a | 14-pin connector, near battery |
T121 | 121-pin connector |
131 | Earth connection 2, in engine compartment wiring harness |
608 | Earth point, in centre of plenum chamber |
* | connection for radiator fan control unit/ radiator fan relay |
** | connection air conditioning system |
-●-- | for models with heater element for crankcase breather only |
J104 | ABS control unit |
J217 | Automatic gearbox control unit |
J248 | Diesel direct injection system control unit, in centre plenum chamber |
J255 | Climatronic control unit |
T10 | 10-pin connector, orange, in connector protective housing, on left in plenum chamber |
T10w | 10-pin connector, white, in connector protective housing, on left in plenum chamber |
T16b | 16-pin connector |
T17a | 17-pin connector, behind centre dash panel |
T47a | 47-pin connector |
T68a | 68-pin connector, models with 5-speed automatic gearbox (AG5) |
T121 | 121-pin connector |
A121 | Connection (high bus), in dash panel wiring harness |
A122 | Connection (low bus), in dash panel wiring harness |
--- | models with automatic gearbox only |
-●●- | only models with Climatronic |
G40 | Hall sender |
J248 | Diesel direct injection system control unit, in centre plenum chamber |
N240 | Unit injector valve, No. 1 cyl. |
N241 | Unit injector valve, No. 2 cyl. |
N242 | Unit injector valve, No. 3 cyl. |
N243 | Unit injector valve, No. 4 cyl. |
T3a | 3-pin connector, on front of engine |
T8u | 8-pin connector, on left of cylinder head |
T121 | 121-pin connector |
E48 | Connection (injectors), in injection system wiring harness |
F27 | Connection (screening), in diesel direct injection wiring harness |
* | from August 2004 |
*** | up to July 2004 |
G70 | Air mass meter |
G81 | Fuel temperature sender |
J248 | Diesel direct injection system control unit, in centre plenum chamber |
N18 | Exhaust gas recirculation valve |
N75 | Charge pressure control solenoid valve |
N345 | Exhaust gas recirculation cooler change-over valve |
T5 | 5-pin connector |
T10f | 10-pin connector, in front engine compartment |
T10w | 10-pin connector, white, in connector protective housing, on left in plenum chamber |
T121 | 121-pin connector |
E29 | Connection, in engine wiring harness |
* | only models with glow plugs coolant heating |
-●●- | only models without glow plugs coolant heating |
E45 | Cruise control system switch** |
E227 | Cruise control system (CCS) SET button** |
F36 | Clutch pedal switch |
J217 | Automatic gearbox control unit |
J248 | Diesel direct injection system control unit, in centre plenum chamber |
T4q | 4-pin connector |
T10 | 10-pin connector, orange, in connector protective housing, on left in plenum chamber |
T10e | 10-pin connector, black, in connector protective housing, on left in plenum chamber |
T10s | 10-pin connector, next to steering column |
T10w | 10-pin connector, white, in connector protective housing, on left in plenum chamber |
T68a | 68-pin connector, models with 5-speed automatic gearbox (AG5) |
T121 | 121-pin connector |
A27 | Connection (speed signal), in dash panel wiring harness |
A155 | Connection 2 (86), in dash panel wiring harness |
* | only models with manual gearbox |
** | only models with GND |
--- | models with automatic gearbox only |
F | Brake light switch |
F47 | Brake pedal switch |
J248 | Diesel direct injection system control unit, in centre plenum chamber |
J359 | Low heat output relay**, in protective housing on left in engine compartment (53) |
J360 | High heat output relay**, in protective housing on left in engine compartment (100) |
Q7 | Glow plugs, coolant** |
S13 | Fuse 13 in fuse holder |
T6 | 6-pin connector, brown, in connector protective housing, on left in plenum chamber |
T10e | 10-pin connector, black, in connector protective housing, on left in plenum chamber |
T10w | 10-pin connector, white, in connector protective housing, on left in plenum chamber |
T121 | 121-pin connector |
A18 | Connection (54), in dash panel wiring harness |
A155 | Connection 2 (86), in dash panel wiring harness |
D50 | Positive connection (30), in engine compartment wiring harness |
D98 | Connection (glow plugs), in engine compartment wiring harness |
** | only models with glow plugs coolant heating |
-●-- | for models with heater element for crankcase breather only |
G | Fuel gauge sender** |
G6 | Fuel system pressurisation pump |
J17 | Fuel pump relay, on additional relay carrier above the relay plate |
S228 | Fuse 28 in fuse holder |
S232 | Fuse 32 in fuse holder |
S234 | Fuse 34 in fuse holder |
S243 | Fuse 43 in fuse holder |
T6 | 6-pin connector, brown, in connector protective housing, on left in plenum chamber |
T14a | 14-pin connector, near battery |
269 | Earth connection (sender earth) 1, in dash panel wiring harness |
A71 | Connection (86), in dash panel wiring harness |
A100 | Connection 2 (87), in dash panel wiring harness |
B168 | Connection (86), in interior wiring harness |
* | only models with multifunction display |
** | models with four-wheel drive ⇒ four-wheel drive Current Flow Diagram |
*** | models with multifunction display and without Climatronic only |
F1 | Oil pressure switch |
G22 | Speedometer sender, on gearbox |
G32 | Coolant shortage indicator sender |
G266 | Oil level and oil temperature sender*** |
J217 | Automatic gearbox control unit |
S5 | Fuse 5 in fuse holder |
S7 | Fuse 7 in fuse holder |
T10h | 10-pin connector, blue, in connector protective housing, on left in plenum chamber |
T14a | 14-pin connector, near battery |
T68a | 68-pin connector, models with 5-speed automatic gearbox (AG5) |
85 | Earth connection 1, in engine compartment wiring harness |
269 | Earth connection (sender earth) 1, in dash panel wiring harness |
608 | Earth point, in centre of plenum chamber |
A20 | Connection (15a), in dash panel wiring harness |
B163 | Positive connection 1 (15), in interior wiring harness |
* | only models with manual gearbox |
*** | only flexible service interval display |
--- | models with automatic gearbox only |
G1 | Fuel gauge |
G3 | Coolant temperature gauge |
G5 | Rev. counter |
J285 | Control unit in dash panel insert |
K3 | Oil pressure warning lamp |
K28 | Coolant temperature and coolant shortage warning lamp |
K38 | Oil level warning lamp*** |
K105 | Reserve fuel warning lamp |
T32 | 32-pin connector, blue |
T32a | 32-pin connector, green |
A27 | Connection (speed signal), in dash panel wiring harness |
* | only models with manual gearbox |
*** | only flexible service interval display |
--- | models with automatic gearbox only |
E86 | Multifunction display call-up button |
E109 | Multifunction display memory switch |
G17 | Ambient temperature sensor |
G21 | Speedometer |
H3 | Buzzer |
J119 | Multifunction display |
J255 | Climatronic control unit |
J285 | Control unit in dash panel insert |
J533 | Data bus diagnostic interface, in dash panel insert |
K2 | Alternator warning lamp |
K29 | Glow period warning lamp |
K31 | Cruise control system warning lamp |
T6e | 6-pin connector |
T12a | 12-pin connector, behind centre dash panel |
T16 | 16-pin connector, in centre dash panel, self-diagnosis connection |
T20 | 20-pin connector |
T32 | 32-pin connector, blue |
T32a | 32-pin connector, green |
A76 | Connection (diagnosis wire K), in dash panel wiring harness |
* | only models with multifunction display |
*** | models with multifunction display and without Climatronic only |
-●- | only models with Climatronic |