Remove/install radiator unit

AR20.20-P-3871MRK

Remove/install radiator unit

01.07.2019

Engine

264 in model 167

1

Radiator unit

5

Bracket

2

Bolts

6

Vent line

3

Air duct segment

7

Expansion rivet

4

Temperature sensor

1

Radiator unit

8

Cross strut

9

Mounting consoles

1

Radiator unit

10

Electrical connector

11

Bracket

 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 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

 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

 Caution

Risk of injury caused by scraping or cutting body parts on sharp vehicle parts

Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.

AS00.00-Z-0017-01A

Topical note

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

AH83.30-N-0005-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

Notes on handling refrigerant R1234yf

AH83.30-P-0003-02A

Notes on handling refrigerant R134a

AH83.30-N-0003-01A

 

Remove/install

1

Remove the engine compartment lining at the front and in the center.

AR61.20-P-1105ME

2

Remove front bumper.

AR88.20-P-2000ME

3

Release and disconnect the electrical connector (10) and remove the electrical line from the holder (11).

Engine 264 in model 167
with code 233 (DISTRONIC PLUS)
Engine 264 in model 167
with code 489 (AIRMATIC)

4

Unscrew the screws for the holder (11) and remove the holder (11).

Engine 264 in model 167
with code 233 (DISTRONIC PLUS)
Engine 264 in model 167
with code 489 (AIRMATIC)

 Screw, bracket to mounting support of radiator unit at front bottom

*BA62.30-P-1009-02I

5

Remove the radiator shutters.

Engine 264 in model 167
with code 9U7 (Aerodynamic measure package control code)

AR20.20-P-3882MRK

6

Remove screws (2).

7

Remove expansion rivets (7).

 Dismantling tool

*000589956300

8

Remove the temperature sensor (4) from the air duct segment (3).

9

Remove air duct segment (3).

10

Discharge air conditioning system.

AR83.30-P-1760ME

11

Remove fan unit.

AR20.40-P-5050MRK

12

Remove the holders (5).

13

Drain off coolant.

AR20.00-P-1142MRK

14

Remove the coolant hoses from the radiator unit (1).

AR20.20-P-7441-01RQ

15

Remove the bleed line (6) from the radiator unit (1).

AR20.20-P-7441-01RQ

16

Remove the refrigerant lines from the condenser and place to one side; seal the openings with suitable stop plugs.



Compressor oils (specification 362.1)

BB00.40-P-0362-01A

 Installation: Replace sealing ring.
Moisten sealing ring with compressor oil.

 Nut, refrigerant line to condenser

*BA83.30-P-1003-01U

 Record plug

*129589009100

17

Release and disconnect the electrical connector of refrigerant pressure sensor(B12/2) and unclip the line from radiator unit(1).

AR83.30-P-5430OID

18

Remove cross strut (8).

 Nut/screw, lower crossmember to radiator unit mounting support

*BA62.30-P-1006-02I

19

Secure radiator unit (1) against falling down.

20

Remove mounting supports (9).

 Screw, radiator unit mounting support to front crossmember

*BA62.30-P-1007-02I

21

Unclip side air duct segments from radiator unit(1).

22

Release the radiator unit (1) and remove downward.

 Aid of helper required.

 The radiator unit (1) comprises the additional cooler, cooler, condenser and cooler low-temperature circuit.



Check

23

Check the radiator unit (1) for damage.

If damage is present



Replace corresponding component.

24

Check lower elastomer bearings of radiator unit(1) for wear and damage.

If damage is present



Replace lower elastomer bearings

25

Install in the reverse order

 Frond end with reinforcement

Number

Designation

Model 167

BA62.30-P-1006-02I

Nut/screw, lower crossmember to radiator unit mounting support

M10

Nm

55

 Frond end with reinforcement

Number

Designation

Model 167

BA62.30-P-1007-02I

Screw, radiator unit mounting support to front crossmember

M6

Nm

10

 Frond end with reinforcement

Number

Designation

Model 167

BA62.30-P-1009-02I

Screw, bracket to mounting support of radiator unit at front bottom

M6

Nm

8

 Air conditioning

Number

Designation

Model 167

BA83.30-P-1003-01U

Nut, refrigerant line to condenser

M6

Nm

12