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REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Mercedes-Benz E-Class W123 (from 1976 to 1985, the year of issue)

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Mercedes-Benz W123
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W123
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Schematic diagrams of electrical equipment
Model "250" engine with 123,026
Model "280" engine with 123,030
Models "280E" to the motor 123,033
Models "280E" (engine 123,033, starting with the chassis number 081 279) and the "280SE" (engine 123,053, starting with the chassis number 021 430)
Models "280TE" with the engine 123,093
Models "280TE" with 123,093 engines, starting with the chassis number 007 619
Body and Equipment
 


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Schematic diagrams of electrical equipment




Model "250" engine with 123,026


Legend schematic circuit diagrams

Number

Designation

1

Left block headlamp:

a

  • beam filament

b

  • beam filament

from

  • lamp Position / parking lights

d

  • light fog lights

e

  • Lamp Indicator

2

Sensor control lamp brake fluid level

3

Contact wear left front brake pads

4

Lamp lighting scenes shift lever *

5

Device combination:

a

  • indicator lamp left turn indicator

b

  • warning lamp for brake pad wear

from

  • control lamp brake fluid level and the parking brake

d

  • fuel reserve warning lamp

e

  • fuel gauge

f

  • coolant temperature

g

  • lamps lighting devices

h

  • rheostat lighting devices

i

  • warning lamp battery discharge

j

  • warning lamp beam headlights

k

  • Right indicator lamp Indicator

l

  • Digital Watch

6

Cigarette lighter with lamp ashtray

7

Radio*

8

The right block headlamp:

a

  • beam filament

b

  • beam filament

from

  • lamp Position / parking lights

d

  • light fog lights

e

  • Lamp Indicator

9

Spiral heat automatic air flap

10

The solenoid shut-off valve of fuel idling II

eleven

Automatic antenna *

12

Switch the parking brake

13

Coolant temperature

14

Contact Wear the right front brake pads

15

Front ceiling with switch

16

Switch the ceiling in the front left door

17

Switch the ceiling in the front right door

18

Sound signal

19

Sensor speed controller software *

20

Amplifier software control speed *

21

Actuator Throttle *

22

The switch / relay-breaker 4-way alarm

23

Switch courtesy light glove box

24

Courtesy light glove box

25

Fuse block

26

The solenoid shut-off valve of fuel idling I

27

Relay I activate windows *

28

Relay II switching windows *

29

A door window switch *

thirty

Horn switch

31

The combined steering column switch:

a

  • Turn signal switch

b

  • alarm switch headlights

from

  • dimmer switch

d

  • windshield washer switch

e

  • speed switch windscreen wiper

I

  • intermittent operation

II

  • low speed

III

  • high speed

32

Switch software control speed:

A

  • turned off

V

  • deceleration setting /

SP

  • return to the previous rate of movement

AT

  • acceleration / tuning

33

Windscreen wiper motor

34

Relay intermittent operation of the windscreen wiper

35

Ignition Switch

36

Rotary light switch

37

The electric sunroof *

38

Switch sunroof with electric *

39

The solenoid valve of an automatic transmission *

40

Foot Switch enable low gear *

41

The switch of blocking of a starter and reversing light *

42

C relay II *

43

Relay conditioner I *

44

Switch fan with light

45

Brake light switch

46

Washer pump Windshield

47

Motor cleaner left headlight *

48

Right headlight wiper motor *

49

Relay headlight cleaners *

50

Headlight washer pump *

51

Distributor*

52

Spark plug

53

Ignition coil

54

Lighting:

a

  • handle air flow direction

b

  • heater control knobs

from

  • switch*

55

Thermoelectric switch (62 ?� C) desiccant air conditioner *

56

Thermoelectric switch (100 ?� C)

57

Electric window left rear door *

58

Window Switch Left Rear Door *

59

Power Window Switch *:

a

  • window switch left rear door *

b

  • safety switch

from

  • Switch the left front door window

d

  • window switch right front door

e

  • Window Switch Right Rear Door

60

Fan motor

61

Incremental resistance of the fan motor

62

Selector Switch temperature conditioning system with lighting *

63a

The electromagnetic clutch of the compressor air conditioner *

63b

The gauge of emergency pressure of the air conditioning compressor * (inclusion at 2.6 kgf / cm 2, off at 2.0 kgf / cm 2)

64

Additional fan *

65

Relay additional fan *

66

Switch for heated rear window

67

Time relay for heated rear window

68

1.8 Ohm series resistor

69

Electric window left front door *

70

Electric window right front door *

71

DLC

72

TDC sensor

73

Lamp lighting luggage

74

Connector wiring to the rear of the vehicle to consumers

75

Window Switch Right Rear Door *

76

Electric window right rear door *

77

Sensor fuel level indicator

78

Rear Courtesy light

79

Switch the ceiling in the front left rear door *

80

Switch back room lamp *

81

Switch the ceiling in the front right rear door *

82

Generator with electronic voltage regulator

83

Accumulator battery

84

Starter

85

Right tail light:

a

  • Lamp Indicator

b

  • red light / parking light

from

  • reversing light bulb

d

  • light stoplight

86

Heated rear screen *

87

Bulb license plate light

88

Left tail light:

a

  • Lamp Indicator

b

  • red light / parking light

from

  • reversing light bulb

d

  • light stoplight

e

  • light fog lights

* Depending on the configuration.

A designation of color of wires

Designation

Decoding

bl

blue

br

brown

el

ivory

ge

yellow

gn

green

gr

gray

nf

colorless

rs

pink

rt

red

sw

black

vi

purple

ws

white

The first two letters indicate the color of the wire, the second two letters of the color strip to the wire. The numbers near the symbol indicate its color Wire cross-section in mm 2.


Schematic diagram of electrical equipment (1)


Schematic diagram of electrical equipment (2)





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Model "250" engine with 123,026

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