Remove/install refrigerant line between refrigerant compressor and evaporator - AR83.30-P-7811MCU

MODEL 451.3##/4## (except 451.39/49) 1# with CODE (I01) Air conditioning Plus

Shown on model 451.4 up to production date 2.6.08

Fig 1: Identifying Refrigerant Line Between Refrigerant Compressor And Evaporator Remove/Install Components (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Refrigerant Line Between Refrigerant Compressor And Evaporator Remove/Install Components (2 Of 2)

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 refrigerant line (16) between evaporator and condenser		AR83.30-P-7812MCU
	Risk of death caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer.	AS00.00-Z-0010-01A
2	Raise vehicle with vehicle lift
3	Remove underfloor panels	Rechargeable drill/screwdriver
4	Remove front bulkhead (17)	The front bulkhead is bolted with two nuts.
5	Drain coolant		AR20.00-P-1142MCU
6	Remove diagonal struts	In model 451.4	AR61.10-P-5138MCU
7	Remove screws/bolts (10) and remove carrier (9)	In model 451.4
			*BA61.25-P-1003-01B
8	Remove bulkhead wall	In model 451.4	AR61.25-P-6600MCU
9	Unclip refrigerant lines (1, 2) from bracket (5)	Make sure that refrigerant lines (1, 2) are a minimum distance of 5 mm from fuel tank or other components. Otherwise noises and damage due to impacts or chafing may occur.
10	Unclip refrigerant lines (1, 2) from bracket (18) and remove bracket (18)	On vehicles in which the bracket (18) is still installed. The bracket (18) may no longer be installed.
11	Open quick-release coupling (11) of refrigerant line (1) and remove seal ring of refrigerant line (1)	Seal refrigerant line (1) and refrigerant line of refrigerant compressor with suitable stop plugs. Otherwise penetrating dirt and moisture damage components that are connected to the refrigerant circuit. Replace the sealing ring at the refrigerant line (1) 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
		Cutting tool set	Figure
12	Support fuel tank (8) using transmission jack (15) and removal fixture	Removal fixture Transmission jack	Fig 3
13	Remove bolts (7)		*BA47.10-P-1001-01F
14	Carefully lower fuel tank (8) as far as possible	When lowering the fuel tank (8), ensure that filler neck of fuel tank (8) is not damaged. Otherwise fuel tank (8) must be replaced.
15	Unclip brake line (6) from brackets (3, 4)
16	Unclip wiring harness bracket (12) on refrigerant line (1)
17	Pull refrigerant line (1) out of expansion valve
18	Remove supports and swivel radiator unit (14) forward and to one side	Aid of helper required.
		Mount	Fig 4
19	Place coolant hose (13) to one side and lead out refrigerant line (1) towards front	Aid of helper required.
20	Secure radiator unit (14) with supports	Mount	Fig 4
21	Remove filter dryer	Always replace the filter drier after opening the refrigerant circuit.	AR83.30-P-6525MCC
22	Install in the reverse order