Remove/install expansion valve - AR83.30-P-5520MCU

MODEL 451.3/4 (except 451.39/49) with CODE (I01) Air conditioning Plus 

Fig 1: Identifying Expansion Valve Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of explosion  caused by welding or soldering work on closed air conditioning system. Risk of poisoning  caused by inhaling overheated refrigerant vapors. Risk of injury  to skin and eyes caused by contact with liquid refrigerants.	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 areas. Carry out repair work on the air conditioning system circuit only after the system has been emptied.	AS83.00-Z-0001-01A
	Procedure for a damaged or leaky air conditioning system		AH83.30-N-0004-01A
	Protect air conditioning circuit and components from moisture when carrying out repair work		AH83.30-N-0005-01A
	Notes on handling R134a refrigerant	Air conditioning with refrigerant R134a	AH83.30-N-0003-01A
1	Remove front CBS		AR88.00-P-1010MCC
2	Drain air conditioning system	Evacuate air conditioning and then fill.	AR83.30-P-1760MCC
3	Remove front module		AR62.30-P-1575MCU
4	Unscrew nut (2)		*BA83.30-P-1004-01L
5	Pull out refrigerant lines (3) at expansion valve (1) and remove seal rings of refrigerant lines (3)	Close off refrigerant lines (3) and expansion valve (1) with suitable stop plugs. Otherwise penetrating dirt and moisture damage components that are connected to the refrigerant circuit. Replace sealing rings at refrigerant lines (3) and coat with compressor fluid when inserting.
	Compressor oils (specification 362.0)	Sheet 362.0	MB 362.0 compressor oil A 001 989 08 03
6	Remove screws/bolts (4)		*BA83.30-P-1003-01L
7	Remove expansion valve (1)	Close off openings of evaporator connection lines with suitable stop plugs. Otherwise penetrating dirt and moisture damage components that are connected to the refrigerant circuit. Replace seal rings at evaporator connecting lines and coat with compressor fluid when inserting.
	Compressor oils (specification 362.0)	Sheet 362.0	MB 362.0 compressor oil A 001 989 08 03
8	Remove filter dryer	Always replace the filter drier after opening the refrigerant circuit	AR83.30-P-6525MCC
9	Install in the reverse order