Remove/install radiator unit

AR20.20-P-3871MRO

Remove/install radiator unit

21.07.2020

Engine

264 in model 463

1

Cooler unit

5

Fastening bracket

10

Air duct segment

2

Electrical subharness

6

Vent line

1

Cooler unit

3

Covers

1

Cooler unit

8

Vent line

4

Air ducting

11

Bracket

7

Electrical connector

1

Cooler unit

9

Coolant line

12

Oil cooler

 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

 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

Notes on coolant

AH20.00-N-2080-01A

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

 

Remove/install

1

Drain off coolant.

AR20.00-P-1142MRO

2

Discharge air conditioning system.

Engine 264 in model 463
as of model year 2020

AR83.30-P-1760XG

3

Remove bottom engine compartment lining.

Engine 264 in model 463
as of model year 2020

AR61.20-P-1105XG

 Installation: Only install lower engine compartment paneling after leak test.

4

Remove front bumper.

Engine 264 in model 463
as of model year 2020

AR88.20-P-2000XG

 Installation: Only install front bumper after leak test.

5

Remove electric controller unit for Active Distance Assist DISTRONIC (A108/1).

Engine 264 in model 463
as of model year 2020
with code EM4 (Driving Assistance package)

AR54.21-P-0701XG

6

Unclip electrical subharness (2) of the Active Distance Assists DISTRONIC electric controller unit (A108/1) from the radiator crossmember.

 Dismantling tool

*000589956300

7

Unclip covers (3) and remove.

 Dismantling tool

*000589956300

8

Remove radiator crossmember.

Engine 264 in model 463
as of model year 2020

AR62.30-P-2300XG

9

Unclip air ducting (4) and remove.

 Dismantling tool

*000589956300

10

Remove mounting supports (5).

 Bolt, mounting support to connecting carrier/side wall

*BA62.30-P-1008-01J

11

Remove bleed line (6) from the cooler unit (1) and seal openings using suitable stop plugs.

 Record plug

*129589009100

12

Release and disconnect electrical connector (7) from the cooler unit (1).

13

Unclip electric line of the electrical connector (7) from the cooler unit (1).

14

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



Compressor oils (specification 362.1)

BB00.40-P-0362-01A

 Installation: Replace sealing rings and moisten with compressor oil.

 High-pressure line to condenser

*BA83.30-P-1005-01C

 Screw, refrigerant line from condenser to refrigerant line to expansion valve

*BA83.30-P-1022-01C

 Record plug

*129589009100

 Assembly tool

*000589936300

15

Release and disconnect electrical connector of refrigerant pressure sensor (B12).

AR83.30-P-5434MRO

16

Disconnect bleed line (8) from the coolant line and unclip from the cooler unit (1).

17

Seal bleed line (8) and exposed coolant line with suitable stop plugs.

 Record plug

*129589009100

18

Remove coolant hoses from the cooler unit (1) and seal openings with suitable protective covers.

AR20.20-P-7441-01RQ

 Set of protective covers

*001589019100

19

Remove bracket (11) of the coolant hose from the blower.

20

Remove oil cooler (12) with connected lines from the cooler unit (1).

Engine 264 in model 463 with transmission 725.0
as of model year 2020

AR27.55-P-1000XGA

21

Remove coolant line (9) from the cooler unit (1).

22

Remove electrical wiring harnesses from the cooler unit (1).

23

Remove air duct segment (10) of the air intake in an upward direction.

24

Take cooler unit (1) off the crossmember and remove in an upward direction.


Do not tilt cooler unit (1) or hit it against other parts.
Otherwise leaks and damage can occur.

 Aid of helper required.



Check

25

Check the cooler unit (1) for damage.

If damage is present:



Replace corresponding component.

26

Check upper elastomer bearings of cooler unit (1) for wear and damage.

If there is a problem,



Replace upper elastomer bearings.

27

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

If there is a problem,



Replace lower elastomer bearings

28

Install in the reverse order.

 Warning

Risk of burn injuries, suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning caused by skin contact with solid components of the exhaust.

Wear protective clothing and safety glasses. Use the extraction system. Move people out of the hazard area.

AS49.00-Z-0001-01A

 Warning

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

29

Perform engine test run; in this connection, check air conditioning system for proper operation and cooler unit (1) for leak tightness.

 Cross member and front reinforcement

Number

Designation

Model 463
up to model year 2019

Model 463
as of model year 2019

BA62.30-P-1008-01J

Bolt, mounting support to connecting carrier/side wall

M8

Nm

-

22

 Air conditioning

Number

Designation

Model 463
up to model year 2019

Model 463
as of model year 2019

BA83.30-P-1005-01C

High-pressure line to condenser

Nm

33

8

 Air conditioning

Number

Designation

Model 463
up to model year 2019

Model 463
as of model year 2019

BA83.30-P-1022-01C

Screw, refrigerant line from condenser to refrigerant line to expansion valve

M6

Nm

-

8