Remove/install heater unit

AR83.70-P-5302Q

Remove/install heater unit

9.6.06

16.5.06

"Disconnect/connect ground line on battery" removed

 

Remove/install

 Danger!

Risk of injury to skin and eyes caused by scalding from contact with hot coolant spray. 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

 Danger!

Risk of explosion caused by fuel vapors igniting, risk of poisoning caused by inhaling combustible gases and risk of injury caused by burns during and after operation of heater unit

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

AS83.70-Z-0002-01A

1

Release pressure in coolant circuit

 Do this by turning cap of coolant expansion tank to detent position 1.

2

Remove front bumper

AR88.20-P-2000Q

3

Remove front engine compartment paneling

AR61.20-P-1105P

4

Pinch coolant hoses (1)



*000589403700

5

Disconnect coolant hoses (1)

 Collect escaping coolant in a clean container and pour back into coolant expansion tank when installation is complete.

6

Seal off fuel hose (2)

 Seal off fuel hose (2) to prevent fuel from escaping.



*129589009100

7

Disconnect connectors (3)

8

Remove bolts (4)

9

Detach STH heater unit (A6) with bracket (5)

10

Install in the reverse order

11

Read out fault memory and erase

 STAR Diagnosis tool.



Check

12

Start up stationary heater

If the STH heater unit (A6) switches off automatically before reaching its operating temperature and cannot be restarted again, a fault interlock is present. To clear fault interlock, see STAR DIAGNOSIS.

13

Inspect cooling system for leaks

AR20.00-P-1010P

14

Perform function check