Remove/Install Refrigerant Compressor - AR83.55-P-5300W

Engine 271, 274, 276 in model 172.4 

with code 580 (Air-conditioning system) 

Engine 271, 274, 276 in model 172.4 

with code 581 (Automatic air conditioning) 

Engine 276 in model 207 

with code 580 (Air-conditioning system) 

Engine 276 in model 207 

with code 581 (Automatic air conditioning) 

Fig 1: Refrigerant Compressor Components Location - Engine 276 In Model 172.4 With Codes 580, 581 (Shown on Model 172 with Engine 271.861)

Courtesy of MERCEDES-BENZ USA

Shown on Model 172 with Engine 271.861 

	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.   Engine 271, 274, 276 in model 172.4 with code 580 (Air-conditioning system) except code 2U8 (Alternative refrigerant)   Engine 271, 274, 276 in model 172.4 with code 581 (Automatic air conditioning) except code 2U8 (Alternative refrigerant)   Engine 276 in model 207with code 580 (Air-conditioning system)   Engine 276 in model 207 with code 581 (Automatic air conditioning)	AS83.00-Z-0006-01A
	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.   Engine 271, 274, 276 in model 172.4 with code 2U8 (Alternative refrigerant) with code 580 (Air-conditioning system)   Engine 271, 274, 276 in model 172.4 with code 2U8 (Alternative refrigerant) with code 581 (Automatic air conditioning)	AS83.00-Z-0007-01A
	Protect air conditioning circuit and components from moisture when carrying out repair work		AH83.30-N-0005-01A
	Procedure for a damaged or leaky air conditioning system		AH83.30-N-0004-01A
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Notes on handling refrigerant R1234yf	Engine 271, 274, 276 in model 172.4 with code 2U8 (Alternative refrigerant) with code 580 (Air-conditioning system)   Engine 271, 274, 276 in model 172.4 with code 2U8 (Alternative refrigerant) with code 581 (Automatic air conditioning)	AH83.30-P-0003-02A
	Notes on handling refrigerant R134a	Engine 271, 274, 276 in model 172.4 with code 580 (Air-conditioning system) except code 2U8 (Alternative refrigerant)   Engine 271, 274, 276 in model 172.4 with code 581 (Automatic air conditioning) except code 2U8 (Alternative refrigerant)   Engine 276 in model 207with code 580 (Air-conditioning system)   Engine 276 in model 207 with code 581 (Automatic air conditioning)	AH83.30-N-0003-01A
	Remove/install
1	Perform initial startup of refrigerant compressor (A9)	When installing new refrigerant compressor (A9).
			AD00.00-P-2000-04A
2	Drain air conditioning system	Engine 271, 274, 276 in model 172.4 with code 580 (Air-conditioning system)	AR83.30-P-1760V
		Engine 271, 274, 276 in model 172.4 with code 581 (Automatic air conditioning)
		Engine 276 in model 207 with code 580 (Air-conditioning system)   Engine 276 in model 207 with code 581 (Automatic air conditioning)	AR83.30-P-1760CW
3	Slacken the poly-V-belt and remove from belt pulley of the refrigerant compressor (A9)	Engine 276 in model 172.4 with code 580 (Air-conditioning system)	AR13.22-P-1202W
		Engine 276 in model 172.4with code 581 (Automatic air conditioning)
		Engine 276.9 in model 207 with code 580 (Air-conditioning system)	AR13.20-P-0001FH
		Engine 276.9 in model 207 with code 581 (Automatic air conditioning)
		Engine 276.8 in model 207 with code 580 (Air-conditioning system)   Engine 276.8 in model 207 with code 581 (Automatic air conditioning)	AR13.20-P-0001ELS
		Engine 271 in model 172 with code 580 (Air-conditioning system)	AR13.20-P-0001CW
		Engine 271 in model 172 with code 581 (Automatic air conditioning)
		Engine 274 in model 172 with code 580 (Air-conditioning system) Engine 274 in model 172 with code 581 (Automatic air conditioning)	AR13.20-P-0001MR
4	Remove bottom engine compartment paneling at front	Engine 271, 274, 276 in model 172.4 with code 580 (Air-conditioning system)	AR61.20-P-1105W
		Engine 271, 274, 276 in model 172.4 with code 581 (Automatic air conditioning)
		Engine 276 in model 207 with code 580 (Air-conditioning system)   Engine 276 in model 207 with code 581 (Automatic air conditioning)	AR61.20-P-1105EW
5	Remove charge air hoses (4, 5)	Engine 271 in model 172.4 with code 580 (Air-conditioning system)   Engine 271 in model 172.4 with code 581 (Automatic air conditioning)
6	Release and detach electrical connector (9) from refrigerant compressor (A9)
7	Remove screws/bolts (6, 7, 8) from A/C compressor (A9)	A/C compressor (A9) must be secured against falling down.
		Engine 271 in model 172.4 with code 580 (Air-conditioning system)   Engine 271 in model 172.4 with code 581 (Automatic air conditioning) Bolt, refrigerant compressor to timing case/crankcase/engine support	*BA83.55-P-1003-01G
		Engine 274 in model 172 with code 580 (Air-conditioning system) with code 581 (Automatic air conditioning)   Engine 274 in model 172   Engine 276 in model 172.4, 207 with code 580 (Air-conditioning system)   Engine 276 in model 172.4, 207 with code 581 (Automatic air conditioning) Screw/bolt, refrigerant compressor to timing case/crankcase/engine support	*BA83.55-P-1001-01M
8	Remove screw (12)	Engine 271 in model 172.4 with code 580 (Air-conditioning system)   Engine 271 in model 172.4 with code 581 (Automatic air conditioning) Bolt, refrigerant lines to refrigerant compressor	*BA83.55-P-1002-01G
		Engine 274 in model 172 with code 580 (Air-conditioning system)   Engine 274 in model 172 with code 581 (Automatic air conditioning)   Engine 276 in model 172.4, 207 with code 580 (Air-conditioning system)   Engine 276 in model 172.4, 207 with code 581 (Automatic air conditioning) Bolt, refrigerant line to refrigerant compressor	*BA83.55-P-1003-01M
9	Remove low-pressure line (13) from A/C compressor (A9)
	Compressor oils (specification 362.1)	Sealing ring of low-pressure line (13) must be replaced and moistened with compressor oil.	BB00.40-P-0362-01A
10	Seal openings of low-pressure line (13) and A/C compressor (A9) using suitable stop plugs	The openings of the low-pressure line (13) and refrigerant compressor (A9) must be sealed. Otherwise, penetrating dirt and moisture will damage the air conditioning system.
		Record plug	Fig 2
11	Remove screw/bolt (10)	Engine 271 in model 172.4 with code 580 (Air-conditioning system)   Engine 271 in model 172.4 with code 581 (Automatic air conditioning) Bolt, refrigerant lines to refrigerant compressor	*BA83.55-P-1002-01G
		Engine 274 in model 172 with code 580 (Air-conditioning system)   Engine 274 in model 172 with code 581 (Automatic air conditioning)   Engine 276 in model 172.4, 207 with code 580 (Air-conditioning system)   Engine 276 in model 172.4, 207 with code 581 (Automatic air conditioning) Bolt, refrigerant line to refrigerant compressor	*BA83.55-P-1003-01M
12	Remove high-pressure line (11) from A/C compressor (A9)
	Compressor oils (specification 362.1)	The sealing ring of the high-pressure line (11) must be replaced and moistened with compressor oil.	BB00.40-P-0362-01A
13	Seal openings of high-pressure line (11) and A/C compressor (A9) using suitable stop plugs	The openings of the high-pressure line (11) and of the refrigerant compressor (A9) must be sealed. Otherwise, penetrating dirt and moisture will damage the air conditioning system.
		Record plug	Fig 2
14	Lift radiator (14), pull towards the front and fasten in place	Engine 271, 276 in model 172.4 with code 580 (Air-conditioning system)   Engine 271, 276 in model 172.4 with code 581 (Automatic air conditioning)   Engine 276 in model 207 with code 580 (Air-conditioning system)   Engine 276 in model 207 with code 581 (Automatic air conditioning)
15	Remove refrigerant compressor (A9) upwards out of the engine compartment
16	Install in the reverse order
	Check
17	Evacuate air conditioning system, refill it, and then check the system to make sure that it functions correctly and does not leak	Engine 271, 274, 276 in model 172.4with code 580 (Air-conditioning system)   Engine 271, 274, 276 in model 172.4 with code 581 (Automatic air conditioning)	AR83.30-P-1760V
		Engine 276 in model 207 with code 580 (Air-conditioning system)   Engine 276 in model 207 with code 581 (Automatic air conditioning)	AR83.30-P-1760CW

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

Courtesy of MERCEDES-BENZ USA