Remove/install heater

AR83.70-P-5302MA

Remove/install heater

7.9.10



Check



Notes on repairing Telestart

If the vehicle was fitted with Telestart T70 

AH83.70-P-0003-02M

Remove heater unit

AR83.70-P-5302MB

 

Remove/install

1

Remove right front wheelhousing lining

AR88.10-P-1300M

2

Remove body panel at exhaust through feed (4 nuts)

3

Disconnect electrical plug (1).

 Ignition: OFF

 Danger!

Injury hazard to skin and eyes from being scalded by hot coolant which sprays out. 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 bottles.

Wear protective gloves, protective clothing and eye protection.

AS20.00-Z-0001-01A

4

Relieve pressure in coolant circuit

 To do so open the coolant expansion tank's cap.

5

Disconnect coolant line (13) with clamps (10) upstream and downstream of the non-return valve (3)



*000589403700

6

Open hose clamp (2) and disconnect coolant line (13) from non-return valve (3)

 Collect any escaping coolant in a clean container and put back into the coolant expansion tank after heater installation is complete.

7

Pinch off coolant line (7) using a clamp (10) upstream of the circulation pump (A6m1)



*000589403700

8

Open hose clamp (6) and disconnect coolant line (7) from circulation pump (A6m1)

 Collect any escaping coolant in a clean container and put back into the coolant expansion tank after heater installation is complete.

 Danger!

Risk of explosion due to ignition, Risk of poisoning from inhaling fuel vapors and swallowing fuel as well as Injury hazard due to fuel coming into contact with the skin and eyes

Fire, sparks, open flames or smoking forbidden.
Pour fuels only into suitable and appropriately marked containers.

Wear protective clothing when handling fuel.

AS47.00-Z-0001-01A

9

Open hose clamp (5) and disconnect fuel feed line (4)

 Collect escaping fuel.

10

Unscrew nut (9) of bracket (11) of the heater (A6) on the longitudinal frame member

11

Unscrew nuts (8) of bracket (11) of the heater (A6) on the longitudinal frame member

 Support the heater unit from below before removing the nuts.

12

Take out the heater of the stationary heater (A6) with bracket (11) and circulation pump (A6m1)

 Pull off combustion-air intake hose (16) from impression in wheel house.

 

Disassembling, assembling

13

Detach exhaust gas line with muffler (12) from heater of the stationary heater or heater booster (A6)

14

Unclip the cover (15) from the heater of the stationary heater or heater booster (A6)

15

Remove the heater of the stationary heater (A6) by unscrewing the bolts (14) from the bracket (11) and coolant pump (A6m1)

 Bolts of bracket to heater unit

 Installation: Ensure that only a heater up to 30.06.00 is fitted (A6)

*BA83.70-P-1009-01A

16

Disconnect connector for circulation pump/stationary heater, 2-pin (X73/1)

17

Install in the reverse order

18

Bleed the coolant circuit after installing the heater (A6)

AR83.70-P-5302-01M



Check

 Danger!

Risk of explosion due to fuel vapors, Risk of poisoning from inhaling combustion gases and Injury hazard from burns during or after heater operation

Do not operate stationary heater, booster unit or engine with heater booster in closed areas or when refueling. Allow heater to cool down after operation and wear protective gloves.

AS83.70-Z-0002-01A

19

Conduct commissioning of stationary heater

 Refer to Star diagnosis

If the heater switches off automatically (A6) before reaching its operating temperature and also cannot be restarted, a fault interlock is present

(proceed with ).

Eradicate malfunction blockage, see Star diagnosis.

20

Inspect cooling system for leaks

AR20.00-P-1010HA

Number

Designation

Models
215, 220, 230
Thermo Top C heater

BA83.70-P-1009-01A

Screw for heater mount

NM

10