Remove/install heater housing

AR83.25-D-1000FB

Remove/install heater housing

11.06.2013

MODEL

909

with CODE HH9 (Regulated air conditioning (Tempmatic))

1

Heater housing

2

Connector

3

Electrical line

4

Electrical connector

5

Screw

6

Connector

7

Condensation hose

 Danger !

Risk of explosion caused by welding or soldering work on closed air conditioning system. Risk of poisoning caused by inhaling overheated refrigerant vapors. Risk of injury to skin and eyes caused by contact with liquid refrigerant.

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 areas. Carry out repair work on the air conditioning system circuit only after the system has been drained.

AS83.00-Z-0001-01A



Procedure for a damaged or leaky air conditioning system

AH83.30-N-0004-01A



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

AH83.30-N-0005-01A



Notes on handling refrigerant R134a

AH83.30-N-0003-01A

 

Remove/install

1

Remove fluid reservoir

AR83.30-D-6520F

 Installation: Replace receiver/drier.

 Danger !

Risk of explosion from explosive gas. Risk of poisoning and caustic burns from swallowing battery electrolyte. Risk of injury through burns to skin and eyes from battery acid or when handling damaged lead-acid batteries

No fires, sparks, open flames or smoking. Wear acid-resistant gloves, clothing and glasses. Only pour battery acid into suitable and appropriately marked containers.

AS54.10-Z-0001-01A

2

Disconnect ground line from battery



Notes on battery

AH54.10-P-0001-01A

3

Remove cover of radio installation slot

4

Remove glove box

5

Remove stowage compartment below pen holder

6

Remove covering on instrument cluster

AR68.10-D-1550F

7

Remove instrument cluster

AR54.30-D-6015F

8

Remove stowage compartment above glove compartment

AR68.10-D-1515F

9

Remove speaker

AR82.62-D-7833F

10

Remove cover on center part of dashboard

AR68.10-D-1190F

11

Remove air conditioning pushbutton control unit

AR83.25-D-1124FA

 Installation: If wires for air distribution were removed:



Adjust air distribution control cables

AR83.10-D-1400-01F

12

Remove drawer

AR68.10-D-1195F

13

Remove top part of dashboard

AR68.10-D-1020F

14

Remove central electric unit

AR54.25-D-1382F

15

Remove air nozzles in instrument panel

AR68.10-D-1110F

16

Remove dashboard

AR68.10-D-1000F

17

Detach ventilation box and put down on engine

AR83.10-D-0010-03F

18

Remove connectors from heater housing (1) at front

AR83.25-D-1000-01FA

 Collect escaping coolant using suitable vessel.

 Screw/bolt, refrigerant line connector block on evaporator

*BA83.30-N-1008-02A

 Record plug

*129589009100

19

Remove air ducts

AR83.25-D-1000-02F

20

Disconnect connector (2) from exit temperature sensor

21

Expose electrical line (3) and disconnect electrical connector (4)

22

Remove bolts (5)

23

Disconnect connector (6) from evaporator temperature sensor

24

Remove condensed water hose (7)

25

Remove heater housing (1)

 Installation: Ensure that electrical line (3) is routed correctly to heater housing (1). Check seals of air outlet and inlet openings, replace if necessary.

26

Install in the reverse order

27

Set time on instrument cluster

28

Set time on timer for auxiliary heater

MODEL 909
with CODE H12 (Auxiliary heater (warm water))
with CODE HH9 (Regulated air conditioning (Tempmatic))
MODEL 909
with CODE H86 (Chronometer with relay for independent heating)
with CODE HH9 (Regulated air conditioning (Tempmatic))
MODEL 909
with CODE HH9 (Regulated air conditioning (Tempmatic))
with CODE HZ5 (10 kW warm water auxiliary heater with timer)

29

Connect diagnostic system and perform quick test



AD00.00-D-2000-04F

 Delete DTC memory if necessary.

 Refrigerant lines

Number

Designation

MODEL 909
with CODE HH9 (Regulated air conditioning (Tempmatic))

BA83.30-N-1008-02A

Screw/bolt, refrigerant line connector block on evaporator

Nm

5 (0,5)