Remove/install heater housing

AR83.25-W-1000A

6.7.11

MODEL 375.1 with BODY 375.830

MODEL 375.3 with BODY 375.810

MODEL 375.4 with BODY 375.840

MODEL 944 with BODY 944.899

MODEL 950.5/ 6, 952.5/ 6, 953.6, 954.5 with BODY 940.899

MODEL 970, 972, 974, 975, 976 with BODY 972.899

MODEL 958.0 with BODY 958.860 except CODE (XV0) Global cockpit

MODEL 958.2 with BODY 958.870 except CODE (XV0) Global cockpit

W83.20-0064-12

1 Hose clamp

2 Coolant feed hose

3 Hose clamp

4 Coolant drain hose

W83.20-1005-09

5 Heater housing electrical connector

6 Switch unit for heater/ventilation

10 Air duct in left footwell

11 Bolts

12 Heater housing

7 Screw

8 Air duct in right footwell

9 Screw

Modification notes

6.7.11	Value modified: Coolant drain plug to radiator	Engine 904.9, 906.9	*BA20.20-N-1001-01D
	Value modified: Coolant drain plug to radiator		*BA20.20-N-1003-01E

 	Remove/install
1	Switch off ignition
 Danger!	Risk of injury to skin and eyes caused by scalding from contact with hot coolant spray. Risk of poisoning caused by 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
2	Unscrew coolant drain plug from the radiator and drain coolant	 Collect coolant
		 Engine 457.9	*BA20.20-N-1003-01E
		 Engine 904.9, 906.9, 926.9	*BA20.20-N-1001-01D
	Notes on coolant		AH20.00-N-2080-01A
3	Open front flap, slacken hose clamp (1) and detach coolant feed hose (2)
4	Remove dashboard		AR68.10-W-3505A
5	Disconnect heater housing connector (5) at switch unit for heater/ventilation (6)
6	Unscrew bolt (7) at air duct in right footwell (8) and detach air duct from heater housing
7	Unscrew bolt (9) at air duct in left footwell (10) and detach air duct from heater housing	 Pull out air duct in left footwell until heater housing is exposed.
8	Unscrew bolts (11) on heater housing (12) and remove heater housing	 Do not damage cables when removing from heater housing.
9	Install in the reverse order
10	Inspect heater and ventilation for proper operation

 Radiator, coolant hoses

Number	Designation		Engine 457.9


BA20.20-N-1003-01E	Coolant drain plug to radiator	Nm	4

 Radiator, coolant hoses

Number	Designation		Engine 904.9, 906.9	Engine 926.9


BA20.20-N-1001-01D	Coolant drain plug to radiator	Nm	4	4