Mercedes-Benz Service Manual Automatic Climate Control Model 126

Mercedes-Benz Service Manual Automatic Climate Control Model 126 | PDF

Mercedes-Benz technical manual for the Automatic Climate Control system in Model 126 vehicles, especially useful for diagnosis, repair, maintenance and restoration of classic W126 models.

This edition brings together factory technical information for the automatic climate control system installed in Mercedes-Benz Model 126 vehicles, including SE/SEL sedans and SEC coupés according to year, chassis, engine version 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 the Mercedes-Benz W126 Automatic Climate Control system, with information for heating, ventilation, refrigeration, sensors, vacuum elements, compressor, evaporator, blower, control unit and related components.

The scope of the manual can be reviewed in more detail in the Complete Index tab, where the included technical groups, operations and supplements are listed.

Main topics covered in the Mercedes-Benz Model 126 climate control manual

• Instructions for use of the Mercedes-Benz service manual
• Model, climate control system, chassis and engine identification
• Vehicle identification number locations
• Removal and installation of the heat exchanger
• Heater blower, air jet nozzle and pre-resistance group
• In-car temperature sensor and heat exchanger temperature sensors
• Electronic switching unit and automatic heating components
• Air intake covers, vacuum elements, vacuum reservoir and dashboard air outlets
• Refrigerant circuit and procedures for refilling, draining and oil level checking
• Refrigerant compressor, electromagnetic clutch, condenser and receiver dehydrator
• Pressure switches, temperature switches, expansion valve and evaporator
• Automatic Climate Control function tests
• Vacuum diagrams, pneumatic circuits and switchover valves
• Mono valve, recirculating pump, sensors, ETR switch and relays
• Control unit, vacuum elements and electronic switchgear for temperature and blower control
• Supplement covering automatic climate control changes for model years 1986, 1987 and 1988

Mercedes-Benz models included in this manual:

• Series W126: 300 SD Turbo, 300 SDL Turbo, 300 SE, 300 SEL, 380 SE, 380 SEL, 420 SEL, 500 SEL and 560 SEL
• Series C126: 380 SEC, 500 SEC and 560 SEC

Main technical application:

• Model 126.120: 300 SD Turbo
• Model 126.125: 300 SDL Turbo
• Model 126.024: 300 SE
• Model 126.025: 300 SEL
• Model 126.032: 380 SE
• Model 126.033: 380 SEL
• Model 126.035: 420 SEL
• Model 126.037: 500 SEL
• Model 126.039: 560 SEL
• Model 126.043: 380 SEC
• Model 126.044: 500 SEC
• Model 126.045: 560 SEC

Important: This manual applies to the Mercedes-Benz Automatic Climate Control system used in Model 126 vehicles starting model year 1981. 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: 253
• File size: 14.5 MB
• Delivery method: Download link

Frequently asked questions

Does this manual apply to Mercedes-Benz W126 models?

Yes. It is intended for Mercedes-Benz Model 126 vehicles equipped with Automatic Climate Control, including SE, SEL and SEC versions according to year, chassis and engine version.

What climate control systems does it include?

It includes technical information for heating, ventilation, refrigeration and Automatic Climate Control, with diagnostic, removal, installation and repair procedures.

Does it include vacuum system and sensor information?

Yes. The manual includes vacuum circuits, pneumatic elements, switchover valves, temperature sensors, control unit and testing procedures.

Does it include air conditioning repair procedures?

Yes. It covers the refrigerant circuit, refilling, draining, compressor, electromagnetic clutch, condenser, receiver dehydrator, expansion valve, evaporator and related components.

Is it useful for restoring classic Mercedes-Benz climate control systems?

Because of its specific coverage of the Model 126 Automatic Climate Control system, it is a useful reference for diagnosis, maintenance, repair and restoration of original Mercedes-Benz W126 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.