Removing and installing heater housing - AR83.25-P-1000G

MODEL 170 

Fig 1: Identifying Heater Housing Remove/Install Components - Model 170 (1 Of 6)

Fig 2: Identifying Heater Housing Remove/Install Components - Model 170 (2 Of 6)

Fig 3: Identifying Heater Housing Remove/Install Components - Model 170 (3 Of 6)

Fig 4: Identifying Heater Housing Remove/Install Components - Model 170 (4 Of 6)

Fig 5: Identifying Heater Housing Remove/Install Components - Model 170 (5 Of 6)

Fig 6: Identifying Heater Housing Remove/Install Components - Model 170 (6 Of 6)

	Removal, installation
	Risk of injury  to skin and eyes from scalding with hot coolant which splashes 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
1	Relieve pressure in cooling system	For this purpose turn cap on supply reservoir to catch "1" and reclose.
2	Drain coolant	Installation:  Pour in coolant.	AR20.00-P-1142HG
	Notes on coolant	All engines	AH20.00-N-2080-01A
3	Remove hose clamp for hot water hose (1)
4	Pull off hot water hose (1)	Plug openings (parts kit)
5	Remove hose clamps from hot water hoses (2+3)	Installation:  Do not mix up hot water hoses.
6	Pull off hot water hoses (2+3)	If necessary remove heat shield and press to side. Plug openings (parts kit).
N	Remove instrument panel	Installation:  Before installing the instrument panel, check for proper functioning.	AR68.10-P-1000G
8	Remove insulating mats
9	Unscrew nuts (4) for instrument cluster holder (5)
10	Remove instrument cluster holder (5)
11	Remove infrared DAS control module (N54/1)	Except with US version (code 491) except with Japanese version (code 498)	AR80.30-P-4500G
12	Separate all cable straps on transverse pipe
13	Remove screw connection (6) for electric leads on body tunnel	This is necessary to remove the cross pipe from the vehicle.
14	Unscrew mounting screws (7) and mounting nuts (8) on jacket tube	Pivot jacket tube out of working area.
15	Pull off electrical connector on passenger airbag squib (R12/8)
16	Remove heater ducts on left and right
17	Unscrew mounting nuts (9) (3x) on heater housing
18	Unscrew mounting screw (10) from body tunnel
19	Unscrew mounting screws (11) (2x) via jacket tube
20	Unscrew mounting screws (12) on A-pillars (3 each)
21	Disconnect connectors from vacuum reservoir (13)
22	Remove transverse pipe	To avoid damage helper is required.
23	Pull off electrical connector on heater core temperature sensor (B10/1)
24	Disconnect electrical connector from fresh air/ recirculating air flap switchover valve (Y13)
25	Remove all cable straps on heater housing
26	Remove heater housing
27	Install in opposite order