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

general info. full specifications. diagnostics. hints. tips. tricks
Mercedes-Benz W123
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Mercedes-Benz
W123
Introduction
Gasoline engines
Coupling
Manual transmission
Automatic Transmission
Driveline and rear axle
The front suspension
Rear suspension
A steering
Brakes
Electrical
Design and specifications
Removing and installing the battery
Topping up the electrolyte in the battery
Charging the battery
Technical obsluzhiva?�nie generator and special precautions
Removing and installing the generator
Check the vehicle alternator and voltage regulator
Removal, survey and installation of generator brushes
Removing and installing starter
Repair of starter
Fuses and relays
Windscreen
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
 


Hit Counter by Digits


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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)




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

Contact Wear the right front brake pads

5

Device combination:

a

  • indicator lamp left turn indicator

b

  • warning lamp beam headlights

from

  • coolant temperature

d

  • fuel gauge

e

  • fuel reserve warning lamp

f

  • warning lamp battery discharge

g

  • warning lamp for brake pad wear

h

  • control lamp brake fluid level and the parking brake

i

  • lamps lighting devices

j

  • rheostat lighting devices

k

  • alarm buzzer

l

  • Right indicator lamp Indicator

m

  • 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

Switch Mode Launcher Fuel

10

Valve pilot fuel

eleven

Automatic antenna *

12

Switch the parking brake

13

Coolant temperature

14

Contact enable emergency buzzer

15

Front ceiling with switch

16

Switch the ceiling in the front left door

17

Switch the ceiling in the front right door

18

A two-tone beep (fanfare)

19

Sensor speed controller software *

20

Amplifier software control speed *

21

Actuator speed control software *

22

The switch / relay-breaker alarm

23

The switch of illumination of a ware box

24

Courtesy light glove box

25

Fuse block

26

The heating element of the warming up of the engine

27

The relay of the fuel pump with an electronic speed limiter of the engine warms up

28

Magnetic coupling air conditioner compressor

29

Relay I activate windows *

thirty

Relay II switching windows *

31

Door Window Switch

32

Switch software control speed *:

A

  • turned off

V

  • deceleration setting /

SP

  • return to the previous rate of movement

AT

  • acceleration / tuning

33

The combined steering column switch:

a

  • Turn signal switch

b

  • alarm switch-beam assistant

from

  • dimmer switch

d

  • windshield washer switch

e

  • speed switch windscreen wiper

I

  • intermittent operation

II

  • low speed

III

  • high speed

34

Horn switch

35

Windscreen wiper motor

36

Relay intermittent operation of the windscreen wiper

37

Ignition Switch

38

Light switch

39

The electric sunroof *

40

Switch sunroof with electric *

41

The solenoid valve of an automatic transmission *

42

Foot Switch enable low gear *

43

The switch of blocking of a starter and reversing light *

44

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

45

C relay II *

46

Switch fan with light

47

Brake light switch

48

Washer pump Windshield

49

Motor cleaner left headlight *

50

Right headlight wiper motor *

51

Relay headlight cleaners *

52

Headlight washer pump *

53

Transistor Ignition Switch

54

Contactless ignition distributor

55

Spark plug

56

Ignition coil

57

Lighting:

a

  • handle air flow direction

b

  • heater control knobs

from

  • switch*

58

The changeover valve control system throttle position

59

Thermoelectric switch (52 ?� C) desiccant air conditioner *

60

Thermoelectric switch (100 ?� C)

61

Additional fan *

62

Relay additional fan *

63

The changeover valve receipts or external return air *

64

Temperature sensor air conditioner *

65

Switch air conditioning temperature selection *

66

Incremental resistance of the fan motor

67

Fan motor

68

0.6 Ohm series resistor

69

Electric window left rear door *

70

Window Switch Left Rear Door *

71

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

72

Electric window left front door *

73

0.4 Ohm series resistor

74

Time relays heated rear window *

75

Switch heated rear window *

76

Lighting scenes gear selector lever *

77

Starter

78

Accumulator battery

79

Generator with electronic voltage regulator

80

Switch the ceiling in the front left rear door *

81

Switch for rear ceiling

82

Switch the ceiling in the front left rear door *

83

Fuel pump

84

Rear ceiling

85

The wiring harness connector to the rear lights

86

Lamp lighting luggage

87

Sensor fuel level indicator

88

TDC sensor

89

Electric window right front door *

90

DLC

91

Electric window right rear door *

92

Window Switch Right Rear Door *

93

Left tail light:

a

  • Lamp Indicator

b

  • red light / parking light

from

  • reversing light bulb

d

  • light stoplight

e

  • light fog lights

94

Bulb license plate light

95

Heated rear screen *

96

Right tail light:

a

  • Lamp Indicator

b

  • red light / parking light

from

  • reversing light bulb

d

  • light stoplight

* Depending on the configuration.

** Recent modifications.

Points of connection with "weight"

Number

Designation

M1

the main point of connection with "weight" (for instrument cluster)

M2

front right point of connection with "weight" (about the headlight)

M3

point of connection with "weight" on the mudguard of the left front wheel (for the ignition coil)

M4

point of connection with "weight" of the front cabin ceiling

M5

"Mass" of the engine

M6

point of connection with "weight" in the luggage compartment on the left wing of the mudguard

M7

point of connection with "weight" in the luggage compartment on the right wing mudguard


Schematic diagram of electrical equipment (1)


Schematic diagram of electrical equipment (2)





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Models "280E" to the motor 123,033
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Models "280TE" with the engine 123,093

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