Remove and install refrigerant pressure and temperature sensor - AR83.30-P-5431V

MODEL 171.4 with CODE (580) Automatic air conditioning with CODE (581) Comfort automatic air conditioning 

Fig 1: Identifying Refrigerant Pressure And Temperature Sensor Components

Courtesy of MERCEDES-BENZ USA

Illustrated on model 171.473 

Fig 2: Identifying Refrigerant Pressure And Temperature Sensor Components - Illustrated On Model 171.473

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of explosion  from welding or soldering work on closed air conditioning system. Risk of poisoning  from inhaling overheated refrigerant vapors. Risk of injury  to skin and eyes caused by contact with liquid refrigerant.	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 discharged.	-
	Conduct if air conditioning system is damaged or leaking	All models	AH83.30-N-0004-01A
	Protect air conditioning circuit and components from moisture when carrying out repair work	All models fitted with air conditioning	-
	Notes on handling refrigerant R134a	Air conditioning system with refrigerant R134a	AH83.30-N-0003-01A
	Risk of death  cased by vehicle slipping or toppling off of the lifting platform.	Align vehicle between the columns of the hydraulic hoist and position the four support plates below the hoist support points specified by the vehicle manufacturer.	-
1	Raise vehicle.		AR00.60-P-1000V
	Risk of injury  caused by fingers being jammed or pinched  when removing, installing or aligning hoods, doors, trunk lid/ rear-end door or sliding roof.	When moving components, ensure that no body parts or limbs are within the operating range of moving parts.	-
2	Open engine hood and raise to vertical position		AR88.40-P-1000V
3	Evacuate AC system	Installation:  Evacuate, refill air conditioning system and check for proper operation and tightness.	AR83.30-P-1760V
4	Remove bottom engine compartment paneling at front		AR61.20-P-1105V
5	Disconnect electrical connector (1).
6	Counterhold pipeline connection (2), unscrew refrigerant pressure sensor (B12) and remove	All except model 171.473 In model 171.473 there is a hexagon for counterholding in front of the refrigerant pressure sensor (B12). Installation:  Replace sealing ring (3). Use compressor oil to wet thread on refrigerant pressure sensor (B12) and sealing ring (3).
			*BA83.30-P-1009-01D
7	Seal opening on pipeline connection (2) using suitable sealing plug	The opening of the pipeline connection (2) must be sealed, as otherwise penetrating dirt and moisture can damage the components connected to the refrigerant circuit.
		Set of sealing plugs for air conditioning system	*WH58.30-Z-1002-27A
8	Install in the reverse order