Remove/install air conditioner housing

AR83.30-P-5200W

Remove/install air conditioner housing

27.06.2019

Model

172.4

with code 580 (Air-conditioning system)

Model

172.4

with code 581 (Automatic air conditioning)

Modification notes

23.03.2017

"Technical note" added

AH00.00-P-5000-01A

14.02.2017

Technical note changed

AH83.30-P-0005-01A

05.10.2016

Safety note added

AS83.00-Z-0006-01A

30.09.2016

Safety note added

AS83.00-Z-0007-01A

30.09.2016

"Technical note" added

AH54.00-P-0001-01A

30.09.2016

General note added

AH83.30-P-0003-02A

1

Expansion valve

2

High pressure pipe

3

Low pressure pipe

4

Circuits

5

Coolant hoses

6

Connection fitting

7

Wiring harness

10

Guide bolts

X15/8

Evaporator temperature sensor electrical connector

8

Supports

A32

AC housing

X28/12

Airbag electrical connector

9

Drain hoses

A32x1

Air conditioner housing electrical connector

 Warning

Risk of poisoning caused by inhaling overheated refrigerant vapors from an air conditioning system containing R134a. Risk of injury to skin and eyes caused by contact with liquid R134a refrigerant and when working on pressurized parts

Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated.

AS83.00-Z-0006-01A

 Danger

Risk of fire due to ignition of R1234yf refrigerant on hot components. Risk of poisoning caused by inhaling overheated refrigerant vapors. Risk of injury to skin and eyes caused by contact with escaped R1234yf refrigerant and when working on pressurized parts. Risk of explosion due to formation of ignitable refrigerant/air mixtures

Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated.

AS83.00-Z-0007-01A

 Warning

Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.

Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.

AS20.00-Z-0001-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

Topical note

Notes on coolant

AH20.00-N-2080-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Topical note

Procedure for a damaged or leaky air conditioning system

AH83.30-N-0004-01A

Topical note

Protect air conditioning circuit and components from moisture when carrying out repair work

AH83.30-N-0005-01A

Notes on handling refrigerant R1234yf

AH83.30-P-0003-02A

Notes on handling refrigerant R134a

AH83.30-N-0003-01A

 

Remove/install

1

Drain air conditioning system, then disconnect air conditioning service unit

AR83.30-P-1760V

2

Remove air-water duct

AR83.25-P-1402V

3

Remove high-pressure line (2) and low-pressure line (3) from expansion valve (1)

AR83.30-P-5520V

4

Release pressure in cooling system

 The cap on the coolant expansion reservoir must be carefully opened and closed again.

5

Clamp off coolant hoses (5) using clamping devices (4) and detach from connection fittings (6) of heat exchanger

 Hose clamp pliers

*003589033700

 Clamp

*000589403700

6

Seal connection fittings (6) of heat exchanger with suitable stop plugs


The openings of the connection fittings (6) must be sealed.
Otherwise, when removing the air conditioner housing (A32) coolant will leak out of the heat exchanger and soil the vehicle interior.

 Record plug

*129589009100

7

Remove cross member under instrument panel

AR68.10-P-1120W

8

Remove airbag electrical connector (X28/12) from air conditioner housing (A32)

9

Release and disconnect electrical connector from air conditioner housing (A32x1)

10

Expose wiring harness (7) on air conditioner housing (A32)

11

Release and disconnect electrical connector from evaporator temperature sensor (X15/8)

12

Detach drain hoses (9) from air conditioner housing (A32)

13

Remove air conditioner housing (A32) from vehicle


The air conditioner housing (A32) must be removed carefully.
Otherwise components in the vehicle interior may be damaged.

 Aid of helper required.

 Installation: The air conditioner housing (A32) must be positioned with the mount (8) onto the guide pin (10).

14

Install in the reverse order



Check

15

Fill coolant, bleed cooling system and check it for leaks

Model 172.4 with engine 274
with code 580 (Air-conditioning system)
Model 172.4 with engine 274
with code 581 (Automatic air conditioning)

AR20.00-P-1142MR

Model 172.4 with engine 271, 651
with code 580 (Air-conditioning system)
Model 172.4 with engine 271, 651
with code 581 (Automatic air conditioning)

AR20.00-P-1142CW

Model 172.4 with engine 152, 276
with code 580 (Air-conditioning system)
Model 172.4 with engine 152, 276
with code 581 (Automatic air conditioning)

AR20.00-P-1142W