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Mercedes-Benz Service Manual Automatic Climate Control Model 123
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Mercedes-Benz W123 Air Conditioning and Automatic Climate Control Manual
Official factory procedures for diagnosis, testing, removal, installation and repair of heating, ventilation, air conditioning and Automatic Climate Control systems in Mercedes-Benz Model 123 vehicles.
PDF in English | 380 pages | Immediate digital delivery.
- Mercedes-Benz technical manual for W123 climate control systems
- Applies to sedan, coupé and wagon models according to year, chassis and installed system
- Includes vacuum, wiring diagrams, sensors, compressor and evaporator
- Useful for diagnosis, repair and restoration of classic climate control systems
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Mercedes-Benz Service Manual Automatic Climate Control Model 123 | PDF
Mercedes-Benz technical manual for heating, ventilation, air conditioning and automatic climate control systems in Model 123 vehicles, especially useful for diagnosis, repair, maintenance and restoration of classic W123 models.
This edition brings together factory technical information for the climate control systems installed in Mercedes-Benz Model 123 vehicles, including heating, ventilation, air conditioning and different Automatic Climate Control versions according to year, chassis and vehicle equipment.
The information is organized by technical groups and job numbers, with identification, testing, removal, installation, adjustment and repair procedures for climate control system components.
Unlike a general maintenance manual, this publication is focused specifically on Mercedes-Benz W123 climate control, with vacuum diagrams, wiring diagrams, function tests, sensors, valves, control units, compressor, evaporator, condenser and related components.
The scope of the manual can be reviewed in more detail in the Complete Index tab, where the included systems, technical groups and operations are listed.
Main topics covered in the Mercedes-Benz Model 123 climate control manual
- Model identification, climate control system identification and vehicle identification number locations
- Heating / Ventilation and Air Conditioning System I
- Air Conditioning System II with Automatic Climate Control
- Air Conditioning System III with Automatic Climate Control
- Safety measures and repair instructions for air conditioning service
- Refrigerant circuit, cleaning, evacuation, refilling and draining of the system
- Leak tests, function tests and quick tests without tester
- Electrical control, wiring diagrams and vacuum diagrams
- Testing vacuum lines, valves, reservoirs and pneumatic circuits
- Heater box, heat exchanger, water valve and blower
- Refrigerant compressor, oil level, electromagnetic clutch and condenser
- Receiver dehydrator, pressure switches, expansion valve and evaporator
- In-car, ambient and heat exchanger temperature sensors
- Control unit, amplifier, relays, blower pre-resistors and switches
- Mono valve, recirculating pump, vacuum elements and air jet nozzle
- Specific procedures for ACC II and ACC III systems according to model year
Mercedes-Benz models included in this manual:
- Series W123: 230, 240 D, 280 E, 280 CE, 300 D, 300 CD, 300 TD, 300 D Turbo and 300 CD Turbo
Climate control systems covered:
- Heating / Ventilation and Air Conditioning System I: 230 and 240 D
- Air Conditioning System II / Automatic Climate Control: 300 D, 300 CD, 300 TD, 280 E and 280 CE
- Air Conditioning System III / Automatic Climate Control: 300 D, 300 D Turbo, 300 CD, 300 CD Turbo, 300 TD, 280 E and 280 CE
Important: This manual applies to Mercedes-Benz heating, air conditioning and automatic climate control systems used in Model 123 vehicles. To apply each procedure correctly, always verify the exact model, year, market, chassis number, engine version, installed system and vehicle equipment.
The digital edition allows quick access to the different technical groups through internal bookmarks, making it easier to search by system, job number, component or model from a computer, tablet or mobile phone.
Item features:
- Format: PDF
- Language: English
- Pages: 380
- File size: 58.5 MB
- Delivery method: Download link
Frequently asked questions
Does this manual apply to Mercedes-Benz W123 models?
Yes. It is intended for Mercedes-Benz Model 123 vehicles, including sedan, coupé and wagon versions, according to the climate control system installed in each year and chassis.
What climate control systems does it include?
It includes Heating / Ventilation and Air Conditioning System I, Air Conditioning System II with Automatic Climate Control and Air Conditioning System III with Automatic Climate Control.
Does it include wiring diagrams and vacuum lines?
Yes. The manual includes wiring diagrams, vacuum diagrams, circuit tests, valves, sensors, switches, relays, control units and diagnostic procedures.
Does it include air conditioning repair procedures?
Yes. It covers the refrigerant circuit, cleaning, evacuation, refilling, draining, compressor, electromagnetic clutch, condenser, receiver dehydrator, expansion valve and evaporator.
Is it useful for restoring classic Mercedes-Benz climate control systems?
Because of its specific coverage of Model 123 climate control systems, it is a useful reference for diagnosis, maintenance, repair and restoration of original Mercedes-Benz systems.
Is this a printed manual?
No. This item is a digital PDF version, delivered immediately after purchase. The file includes technical organization by groups and job numbers, making it easy to locate procedures, diagrams, tests and repair operations. It can be viewed from a computer, tablet or mobile phone, or printed by section when working next to the vehicle.
Mercedes-Benz W123 Climate Control Manual | Index
This index lists the systems, technical groups and job numbers included in the Mercedes-Benz Service Manual Automatic Climate Control Model 123.
Each entry is listed in accordance with the manual’s original technical layout and numbering.
00 General, Technical data
- 00-010 Model and System Identification
- 00-015 Vehicle information number locations
83 Heating ventilation and Air Conditioning System I
- 83-504 Safety measures
- 83-506 Repair instructions for air conditioning system
- 83-518 Cleaning of air conditioning system
- 83-613 Testing vacuum lines for leaks
- 83-100 Removal and installation of heater box
- 83-110 Removal and installation of heat exchanger
- 83-112 Removal and installation, adjustment of bowden wires on water valve for heater
- 83-115 Removal and installation of water valve for heater
- 83-120 Removal and installation of heater blower
- 83-140 Removal and installation of ornamental grille on air inlet
- 83-150 Removal and installation of ring nozzles right or left on instrument panel
- 83-500 General description and operation of air-conditioning system
- 83-502 Refrigerant circuit
- 83-508 Control of air-conditioning system
- 83-510 Function test and quick test of air-conditioning system
- 83-512 Leak test and evacuation
- 83-514 Refilling or replenishing air-conditioning system
- 83-516 Draining of air-conditioning system
- 83-520 Check oil level in refrigerant compressor
- 83-522 Removal and installation of refrigerant compressor
- 83-524 Reconditioning of refrigerant compressor
- 83-526 Removal and installation of electromagnetic clutch
- 83-528 Removal and installation of condenser
- 83-530 Removal and installation of receiver dehydrator
- 83-532 Inspection or removal and installation of pressure switch or temperature switch in reciver dehydrator
- 83-534 Removal and installation of expansion valve
- 83-536 Removal and installation of evaporator housing
- 83-538 Removal and installation of evaporator
- 83-540 Removal and installation of blower
- 83-542 Removal and installation, adjustment or checkup of temperature vacuum switch or temperature dial and temperature sensor for air-conditioning system
- 83-544 Removal and installation of vacuum elements
- 83-545 Checking vacuum elements and temperature vacuum switch for leaks
- 83-546 Removal and installation of supplementary fan
83 Air Conditioning System II Automatic Climate Control
- 83-600 Operation of automatic climate control
- 83-601 Quick test without tester and remedies
- 83-602 Preparation for test, connection of tester
- 83-603 Function test of total system and remedies (with tester)
- 83-604 Vacuum function diagrams
- 83-605 Electric wiring diagrams
- 83-606 Amplifier and park test
- 83-607 Output test
- 83-608 Testing quality of control
- 83-609 Testing ambient, in-car temperature sensor and potentiometer (temperature dial) without tester
- 83-610 Testing feedback potentiometer in regulating valve
- 83-611 Balancing of sensor chain
- 83-612 Testing temperature switch in regulating valve
- 83-614 Preparation for vacuum test
- 83-615 Testing check valve, vacuum reservoir, temperature switch and vent lines of regulating valve
- 83-620 Testing vacuum circuit I and II
- 83-621 Testing pushbutton switch
- 83-622 Testing vacuum circuit III and IV
- 83-624 Testing vacuum circuit V and VI
- 83-626 Testing vacuum circuit VII
- 83-628 Testing vacuum switch for refrigerant compressor or vacuum switch (main switch) and switchover valves
- 83-630 Removal and installation of heating water pump
- 83-631 Reconditioning of heating water pump
- 83-632 Removal and installation of regulating valve and temperature switch
- 83-635 Removal, installation and disassembly of control unit
- 83-640 Removal and installation of in-car temperature sensor
- 83-645 Removal and installation of ambient temperature sensor
- 83-650 Removal and installation of ETR-switch
- 83-660 Removal and installation of switchover valves
- 83-665 Removal and installation of vacuum elements
- 83-670 Removal and installation of vacuum switch e.g. for refrigerant compressor or vacuum switch (main switch)
- 83-675 Removal and installation of amplifier
- 83-680 Removal and installation of double contact relay
- 83-690 Removal and installation of temperature switch for heating water pump
- 83.6-700 Removal and installation of blower - pre-resistors
- 83-710 Removal and installation of vacuum lines
83.8 Air Conditioning System III Automatic Climate Control
- 83.8-600 Operation of automatic climate control
- 83.8-601 Manual and optical test of automatic climate control
- 83.8-602 Preparation for testing, connecting adapter to volt/ohm measuring instrument
- 83.8-603 Function test of total system and remedies (with adapter)
- 83.8-604 Vacuum function diagrams
- 83.8-607 Output test
- 83.8-614 Preparations for vacuum test
- 83.8-615 Testing check valve and vacuum reservoir
- 83.8-620 Testing vacuum circuit I, II and III
- 83.8-622 Testing vacuum circuit IV, V and VI
- 83.8-624 Testing vacuum circuit VII
- 83.8-625 Removal and installation of mono valve
- 83.8-628 Testing switchover valves
- 83.8-630 Removal and installation of recirculating pump
- 83.8-635 Removal, installation and disassembly of control unit
- 83.8-640 Removal and installation of in-car temperature sensor
- 83.8-643 Removal and installation of air jet nozle
- 83.8-645 Removal and installation of temperature sensor for heat exchanger
- 83.8-650 Removal and installation of ETR switch
- 83.8-660 Removal and installation of switchover valves
- 83.8-665 Removal and installation of vacuum elements
- 83.8-675 Removal and installation of electronic switching unit for temperature control
- 83.8-676 Removal and installation of electronic switching unit for temperature control
- 83.8-678 Removal, installation and checking of temperature switch for cold engine lock
Mercedes-Benz W123 climate control | Air conditioning and automatic climate control manual cover