Remove/install refrigerant compressor - AR83.55-P-5300MEX

ENGINE 780.993 in MODEL 451.390/392/490/492 

Fig 1: Identifying Refrigerant Compressor Remove/Install Components

Courtesy of MERCEDES-BENZ USA

Shown with the rear drive module removed 

Fig 2: Identifying Refrigerant Compressor Remove/Install Components - Shown With Rear Drive Module Removed

Courtesy of MERCEDES-BENZ USA

	Risk of death  when touching components on vehicles with high-voltage on-board electrical system	Do not touch components and open lines of the high-voltage on-board electrical system. Persons who wear electronic implants (e.g. cardiac pacemakers), must not carry out any work on high-voltage on-board electrical systems.	AS54.00-Z-0001-01A
	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
	Note on high-voltage on-board electrical system		AH54.00-P-0010-01A
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Evaluation of high-voltage components		AH54.00-P-6500-01SXH
	Notes on handling refrigerant R134a		AH83.30-N-0003-01A
	Remove/install
1	Drain air conditioning system	Evacuate air conditioning and then fill it.	AR83.30-P-1760MCC
2	Disconnect air conditioning service unit
	000 588 04 82 00 Air conditioning service unit		WS83.00-P-0031B
3	Remove transmitter key and mains plug
4	Connect Star Diagnosis and enable high voltage on-board electrical system
		Print out power disable event log and add to the vehicle file. Activate high-voltage system.	AD00.00-P-2000-04MCC
5	Remove interior flap above engine		AR88.40-P-1100-03MCC
6	Separate cable tie (5)	Replace cable tie (5).
7	Release and disconnect refrigerant compressor control unit connector (EAC) (N116/1x1)
8	Release and disconnect refrigerant compressor HV connector (EAC) (N116/1x2)
9	Fit protective covers on refrigerant compressor HV connector (EAC) (N116/1x2) on line side and component side.	Protect the refrigerant compressor HV connector (EAC) (N116/1x2) against dirt and moisture. Otherwise, consequential damage may occur on the high voltage on-board electrical system
		Set of protective caps	Fig 3
10	Remove screw/bolt (7) at bracket (8)
11	Remove screw/bolt (1) at refrigerant intake line (2)	Bolt, refrigerant line to refrigerant compressor	*BA83.55-P-1003-01V
12	Remove screw/bolt (3) at refrigerant pressure line (4)	Bolt, refrigerant line to refrigerant compressor	*BA83.55-P-1003-01V
13	Remove refrigerant intake line (2) and refrigerant pressure line (4), place to one side and remove sealing rings of refrigerant intake line (2) and refrigerant pressure line (4)
	Compressor oils (specification 362.1)	Close off refrigerant intake line (2), refrigerant pressure line (4) and electric refrigerant compressor (A9/6) with suitable stop plugs. Otherwise penetrating dirt and moisture will damage components that are connected to the refrigerant circuit. Replace sealing rings at refrigerant lines (2, 4) and moisten with compressor oil when inserting.	MB 362.1 refrigerant compressor oil (Specification 362.1). See https://bevo.mercedes-benz.com/index.php?language_id=1
14	Unscrew bolt (9)
	Risk of death caused by vehicle slipping or toppling off of the lifting platform. Raise vehicle with vehicle lift	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
16	Remove screw/bolt (10) and remove bracket (11)
17	Remove screws/bolts (12, 13)	Bolt, refrigerant compressor to transmission carrier	*BA83.55-P-1010-01V
18	Lower vehicle with vehicle lift
19	Unscrew screw/bolt (6) and remove electric refrigerant compressor (A9/6) from above	Bolt, refrigerant compressor to transmission carrier	*BA83.55-P-1010-01V
20	Replace dehydrator		AR83.30-P-6525MCC
21	Install in the reverse order

Fig 3: Identifying Set Of Protective Caps (001 589 02 91 00)

Courtesy of MERCEDES-BENZ USA