Remove/Install Air Conditioner Housing - AR83.30-P-5200GW

Model 463.202/234/237/239/272/273/274/275/342/346/348 

as of model year 2013 up to model year 2019 

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA

	Risk of fire  due to ignition of R1234yf refrigerant on hot components. Risk of poisoning  caused by inhaling overheated refrigerant vapors. Risk of injury  to skin and eyes caused by contact with escaped R1234yf refrigerant and when working on pressurized parts. Risk of explosion  due to formation of ignitable refrigerant/air mixtures	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 rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated.	AS83.00-Z-0007-01A
	Risk of poisoning  caused by inhaling overheated refrigerant vapors from an air conditioning system containing R134a. Risk of injury  to skin and eyes caused by contact with liquid R134a refrigerant and when working on pressurized parts	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 rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated.	AS83.00-Z-0006-01A
	Risk of injury  to skin and eyes suffering scalding from contact with hot coolantspray. 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
	Protect air conditioning circuit and components from moisture when carrying out repair work		AH83.30-N-0005-01A
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Notes on coolant		AH20.00-N-2080-01A
	Procedure for a damaged or leaky air conditioning system		AH83.30-N-0004-01A
	Notes on removing and installing the air conditioner housing		AH83.30-P-0006-01GM
	Notes on handling refrigerant R134a		AH83.30-N-0003-01A
	Notes on handling refrigerant R1234yf		AH83.30-P-0003-02A
	Remove/install
1	Drain coolant and collect in a suitable container.
			AP20.00-P-2082F
2	Remove refrigerant reservoir.		AR83.30-P-6520GW
		Replace fluid reservoir each time refrigerant circuit is opened.
3	Remove nut (1).	Nut on expansion valve	*BA83.30-P-1001-01C
4	Disconnect pressure lines with retaining plate (2) and seal using suitable stop plugs.
	Compressor oils (specification 362.1)	Replace sealing rings and moisten with compressor oil.	BB00.40-P-0362-01A
		Record plug	Fig 1
5	Release clamp of hot water feed hose (4) and detach hot water feed hose (4) from fitting.
6	Release clamp of heater return hose (5) and detach heater water return hose (5) from fitting.
7	Seal exposed hoses and connections using suitable stop plugs.	Record plug	Fig 1
8	Move driver and front passenger seat as far back as possible.
9	Remove instrument panel.		AR68.10-P-1000GW
10	Remove bolt (12).
11	Unclip electric lines and side air ducts from air conditioner housing (3).
12	Remove air duct toward rear under center console.		AR83.10-P-0020GW
13	Remove bolts at side on mounting bracket (6) and air ducts.
14	Expose electrical wiring harness along mounting support (6).
15	Release and disconnect electric lines from mounting support (6) and release securing strap on air conditioner housing (3).	Replace red retainer of electrical connector each time it is opened. The retainer is damaged when the connection is opened.
16	Remove bolts (9) and remove mounting support (6).	Ensure that the air duct is correctly seated.
17	Release and disconnect electric lines (7) from electrical connectors.
18	Unclip electric lines (7) from air conditioner housing (3).
19	Release and disconnect electrical connector from blower regulator (A32n1).
20	Detach drain hoses from connection fitting (8).
21	Unscrew bolts (11) and place holder (10) with attached lines onto floor in front passenger footwell.
22	Remove holder from air conditioner housing (3).		AR83.30-P-5200-01GW
23	Remove securing strap from air conditioner housing (3).
24	Pull out air conditioner housing (3) together with blower motor (A32m1).	Carefully remove air conditioner housing (3). Otherwise components in the vehicle interior may be damaged. Aid of helper required.
25	Install in the reverse order
	Normalizing
26	Normalize actuator motors using vehicle diagnosis system.
			AD00.00-P-2000-04A

Fig 1: Identifying Record Plug (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA