Remove/Install CO2 Expansion Valve - AR83.30-P-5520LFA

Model 217, 222 

With Code 1U6 (R744 refrigerant) 

Fig 1: CO2 Expansion Valve Components Location - Model 222 With Code 1U6 (Shown On Model 217)

Courtesy of MERCEDES-BENZ USA

Shown On Model 217 

Courtesy of MERCEDES-BENZ USA

	Risk of injury  when working on air conditioning systems due to R744 refrigerant escaping under pressure. Risk of suffocation from inhaling R744 refrigerant in high concentrations. Health hazard caused by inhalation of R744 refrigerant	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 evacuated.	AS83.00-Z-0008-01A
Notice	Protect air conditioning circuit and components from moisture when carrying out repair work		AH83.30-P-0005-01KOA
	Notes on handling refrigerant R744		AH83.30-P-0003-03A
	Remove/install
1	Drain air conditioning system		AR83.30-P-1760LF
2	Remove left front wheel		AR40.10-P-1102A
3	Remove left fender liner (1)		AR88.10-P-1300LF
4	Disconnect electrical connection (2)
5	Remove refrigerant line (3)	:  Do not use any tools to sever the connections and avoid damage (scratches, notches) to the sealing surfaces. Otherwise, the integrity of the refrigerant circuit can no longer be ensured. :  Gaskets must be replaced.
		Bolt/nut, refrigerant lines to expansion valve	*BA83.30-P-1002-01P
		Bolt, connecting point for lines If damage (scratches, notches) occurs to the sealing surfaces ↓ Replace corresponding component.	*BA83.30-P-1009-01P
6	Use suitable stop plugs to seal openings	Record plug	Fig 2
7	Remove the refrigerant line (4) from expansion valve CO2 (Y148)	:  Do not use any tools to sever the connections and avoid damage (scratches, notches) to the sealing surfaces. Otherwise, the integrity of the refrigerant circuit can no longer be ensured. :  Gaskets must be replaced.
		Bolt/nut, refrigerant lines to expansion valve If damage (scratches, notches) occurs to the sealing surfaces ↓ Replace corresponding component.	*BA83.30-P-1002-01P
8	Use suitable stop plugs to seal openings	Record plug	Fig 2
9	Detach expansion valve CO2 (Y148) with bracket (5) and damper (6) in direction of arrow from refrigerant accumulator bracket (7)	The new expansion valve CO2 (Y148) is delivered together with bracket (5) and damper (6).
10	Install in the reverse order

Fig 2: Identifying Record Plug (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA