Remove/install underfloor refrigerant lines

AR83.50-S-6600E

Remove/install underfloor refrigerant lines

22.08.2019

Model

447.7/8

with code HZ7 (TEMPMATIC semi-automatic air conditioning in rear)

except code XM0 (Facelift)

Model

448

1

Screw

5.1

Bracket

9

Refrigerant line

2

Nut

6

Nut

10

Refrigerant line

3

Refrigerant line

7

Screw

14

Refrigerant line

4

Refrigerant line

8

Screw

15

Refrigerant line

5

Screw

8.1

Bracket

8

Screw

10

Refrigerant line

12

Bracket

8.1

Bracket

11

Nut

13

Screw

9

Refrigerant line

 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

Topical note

Notes on carrying out repair work in the vehicle interior

AH68.00-N-0001-01S

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

Model 447 except code HX1 (R-1234yf refrigerant), model 448

AR83.30-S-1760E

Model 447 with code HX1 (R-1234yf refrigerant)

AR83.30-S-1760EF

2

Raise vehicle

AR00.60-S-1000E

3

Remove left underfloor paneling

Model 447.7##/8## ## up to 048754 with engine 651
with code HZ7 (TEMPMATIC semi-automatic air conditioning in rear)
with code MX0 (BlueEFFICIENCY package)
except code XM0 (Facelift)
Model 447.8## ## as of 048755 with engine 651
with code HZ7 (TEMPMATIC semi-automatic air conditioning in rear)
with code MX0 (BlueEFFICIENCY package)
with code VQ1 (AVANTGARDE)
except code XM0 (Facelift)

AR61.30-S-1001E

4

Remove screws (5) and open bracket (5.1) using suitable tool (arrows A)

When removing refrigerant line (3 or 4).

5

Remove screws (1, 7) from refrigerant line (3)

 Screw/bolt, refrigerant line to refrigerant line on underfloor

*BA83.50-N-1002-01J

6

Remove refrigerant line (3)



Compressor oils (specification 362.1)

BB00.40-P-0362-01A

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

7

Seal refrigerant lines (3, 9, 14) using stop plugs

 Record plug

*129589009100

8

Unscrew nuts (2, 6) from refrigerant line (4)

 Nut, refrigerant line to refrigerant line on underfloor

*BA83.50-N-1001-01J

9

Remove refrigerant line (4)



Compressor oils (specification 362.1)

BB00.40-P-0362-01A

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

10

Seal refrigerant lines (4, 10, 15) using stop plugs

 Record plug

*129589009100

11

Remove screw (13) from refrigerant lines (9, 10)

 Refrigerant lines (9, 10) cannot be individually removed.

 Screw/bolt, refrigerant line to refrigerant line at left rear

*BA83.50-N-1005-01J

12

Remove screws (8) and open bracket (8.1) using suitable tool (arrows B)

13

Unscrew nut (11) on retaining clamp of refrigerant line (9)

14

Remove bracket (12) from refrigerant line (10)

15

Remove refrigerant lines (9, 10)



Compressor oils (specification 362.1)

BB00.40-P-0362-01A

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

16

Seal refrigerant lines (9, 10) using stop plugs

 Record plug

*129589009100

17

Seal rear connections on refrigerant lines (3, 4) using stop plugs

 Record plug

*129589009100

18

Install in the reverse order

 Rear air conditioning

Number

Designation

Model 448

Model 447.7/8
with code HZ7 (TEMPMATIC semi-automatic air conditioning in rear)

BA83.50-N-1001-01J

Nut, refrigerant line to refrigerant line on underfloor

Nm

12

12

 Rear air conditioning

Number

Designation

Model 448

Model 447.7/8
with code HZ7 (TEMPMATIC semi-automatic air conditioning in rear)

BA83.50-N-1002-01J

Screw/bolt, refrigerant line to refrigerant line on underfloor

Nm

20

20

 Rear air conditioning

Number

Designation

Model 448

Model 447.7/8
with code HZ7 (TEMPMATIC semi-automatic air conditioning in rear)

BA83.50-N-1005-01J

Screw/bolt, refrigerant line to refrigerant line at left rear

Nm

12

12