Drain, Evacuate And Recharge Air Conditioning, Check For Proper Operation And Check For Leaks - AR83.30-S-1760E

Model 447 With Code HH4 (THERMOTRONIC automatic climate control) Except Code HX1 (Refrigerant R-1234yf) 

Model 447 With Code HH9 (Air conditioner, automatic heater control) Except Code HX1 (Refrigerant R-1234yf) 

Model 447 With Code HZ7 (TEMPMATIC semi-automatic air conditioning in rear) Except Code HX1 (Refrigerant R-1234yf) 

Model 448 

Shown On Model 447 With Engine 651 

Courtesy of MERCEDES-BENZ USA

Shown On Model 447 with 780.701 engine 

Courtesy of MERCEDES-BENZ USA

	Risk of death  when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)	Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines. Model 447 with engine 780	AS00.00-Z-0035-01A
	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.	AS83.00-Z-0006-01A
Notice	General information on vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment	Model 447 with engine 780	AH00.00-Z-0300-01A
Notice	Procedure for a damaged or leaky air conditioning system		AH83.30-P-0004-01KOA
Notice	Protect air conditioning circuit and components from moisture when carrying out repair work		AH83.30-P-0005-01KOA
	Notes on handling refrigerant R134a		AH83.30-P-0003-01KOA
	Check
1	Read out Vehicle Documentation (VeDoc) and check code entries.	Model 447 with engine 780 The vehicle interior shutoff valve can be installed in the "NO" version or in the "NC" version. If code OB0 (NO SHUTOFF VALVE) is present in VeDoc, ↓ remove code OB0 (NO SHUTOFF VALVE). Codes can only be removed in VeDoc by a user with write permission.
	Draining
2	Disassemble cover caps from service connections and connect low-pressure connection (1) and high-pressure connection (2) of air conditioning service unit.	Drain, evacuate and refill air conditioning and check for proper operation and leak tightness
	000 588 15 82 00 Air conditioning service unit R134a	When connecting and when operating the air conditioning service unit, conduct the complete work procedure in accordance with the operator's manual of the manufacturer.	WS83.00-P-0064B
3	Mount charger.	Model 447 with engine 780	AR54.10-S-1127E
4	Open vehicle interior shutoff valve using diagnostic system.	Model 447 with engine 780	AD00.00-S-2000-04E
		Do not yet remove vehicle diagnosis system. If vehicle interior shutoff valve cannot be opened using diagnostic system, ↓ actuate vehicle interior shutoff valve separately with 12 V. To do so, disconnect electrical connector and use suitable adapter cables for MQS contacts. Electrical connection kit	Fig 1
5	Extract refrigerant using air conditioning service unit.
6	Note down quantity of extracted refrigerant as well as compressor oil.
	Check
7	Check receiver drier for re-usability.	If receiver drier cannot be reused, ↓ Replace drier cartridge. Model 447 with engine 274, 651, model 448 with engine 274	AR83.30-S-6521E
		MODEL 447 with engine 622	AR83.30-S-6521EF
		Model 447, 448 with engine 254, model 447 with engine 654	AR83.30-S-6521EA
		Model 447 with engine 780.701/705	AR08.50-S-8022F
	Replace
8	Replace vehicle interior shutoff valve.	If code OB0 (NO SHUTOFF VALVE) was present in VeDoc. Model 447 with engine 780.701/705 Replace vehicle interior shutoff valve in "NO" version with a vehicle interior shutoff valve in "NC" version.	AR83.30-S-5481F
	Evacuate
9	Open vehicle interior shutoff valve using diagnostic system.	Model 447 with engine 780.701/705 If vehicle interior shutoff valve was replaced.	AD00.00-S-2000-04E
		Do not yet remove vehicle diagnosis system. If vehicle interior shutoff valve cannot be opened using diagnostic system, ↓ actuate vehicle interior shutoff valve separately with 12 V. To do so, disconnect electrical connector and use suitable adapter cables for MQS contacts. Electrical connection kit	Fig 1
10	Clean refrigerant with air conditioning service unit and evacuate refrigerant circuit.
11	Conduct vacuum test using air conditioning service unit.	A fault message in the air conditioning service unit is an indication of a leak in the refrigerant circuit. If the air conditioning service unit shows a fault message, ↓ check air conditioning system for leakage.	AR83.30-S-1761E
	Filling
12	Add new compressor oil to the refrigerant circuit according to the oil filling capacity noted during extraction.
	Add new compressor oil to the refrigerant circuit according to the oil filling capacity noted during extraction. Compressor oils (specification 362.1)	Only use the approved compressor oil. If it is proven that a different compressor oil has been used, we will refuse to reimburse costs within the warranty and goodwill period. Mercedes Benz AG reserves the right to carry out re-examinations. Correct oil filling quantity in refrigerant circuit. An incorrectly measured oil filling capacity leads to damage to the refrigerant compressor.	BB00.40-P-0362-01A
		If the refrigerant compressor is to be replaced, no additional oil may be added. Otherwise the air conditioning system may experience malfunctions or become damaged. The replacement refrigerant compressor is supplied filled with compressor oil. Depending on the repair case, correct oil filling capacity accordingly. Model 447 with engine 780.701/705 Additional oil filling capacity after replacing system	*BF08.50-Z-1002-02KOF
		Model 447 with engine 254, 274, 622, 651, 654, model 448 Additional oil filling capacity after replacing system	*BF83.00-Z-1004-01KOC
		Model 447 with engine 780.701/705 Additional quantity of oil to be added when system suddenly looses fluid (e.g. line ruptured)	*BF08.50-Z-1003-02KOF
		Model 447 with engine 254, 274, 622, 651, 654, model 448 Additional oil filling quantity after sudden emptying of system (e.g. line ruptured)	*BF83.00-Z-1005-01KOC
		Model 447 with engine 780.701/705 Additional oil filling quantity after replacement of evaporator (front end)	*BF08.50-Z-1004-02KOF
		Model 447 with engine 254, 274, 622, 651, 654, model 448 Additional oil filling quantity after replacement of condenser	*BF83.00-Z-1006-01KOC
		Model 447 with engine 254, 274, 622, 651, 654, model 448 Additional oil filling quantity after replacement of evaporator (front end)	*BF83.00-Z-1007-01KOC
		Model 447 with engine 254, 274, 622, 651, 654, model 448 Additional oil filling quantity after replacement of evaporator (rear end)	*BF83.00-Z-1008-01KOC
		Model 447 with engine 780.701/705 Additional oil filling quantity after replacement of refrigerant line (front end)	*BF08.50-Z-1005-02KOF
		Model 447 with engine 254, 274, 622, 651, 654, model 448 Additional oil filling quantity after replacement of refrigerant line (front end)	*BF83.00-Z-1009-01KOC
		Model 447 with engine 254, 274, 622, 651, 654, model 448 Additional oil filling quantity after replacement of refrigerant line (rear end)	*BF83.00-Z-1010-01KOC
		Model 447 with engine 780.701/705 Additional oil filling quantity after replacement of desiccant cartridge	*BF08.50-Z-1007-02KOF
		Model 447 with engine 254, 274, 622, 651, 654, model 448 Additional oil filling quantity after replacement of desiccant cartridge	*BF83.00-Z-1011-01KOC
		Model 447 with engine 780.701/705 Additional oil filling quantity with detectable leakage	*BF08.50-Z-1006-02KOF
		Model 447 with engine 254, 274, 622, 651, 654, model 448 Additional oil filling quantity with detectable leakage	*BF83.00-Z-1013-01KOC
13	Fill refrigerant circuit using air conditioning service unit.
	Refrigerant (specification 361.0)		BB00.40-P-0361-00A
		Model 447 with engine 780.701/705 Total filling capacity of refrigerant circuit	*BF08.50-Z-1001-02KOF
		Model 447 with engine 254, 274, 622, 651, 654 except code HZ7 (TEMPMATIC semi-automatically controlled air conditioning system in rear passenger compartment), model 448 except code HZ7 (TEMPMATIC semi-automatically controlled air conditioning system in rear passenger compartment) Total filling capacity of refrigerant in front air conditioning system	*BF83.00-Z-1001-01KOC
		Model 447 with engine 254, 274, 622, 651, 654 with code HZ7 (TEMPMATIC semi-automatically controlled air conditioning system in rear passenger compartment), model 448 with code HZ7 (TEMPMATIC semi-automatically controlled air conditioning system in rear passenger compartment) Total filling capacity of refrigerant in front and rear air conditioning systems	*BF83.00-Z-1002-01KOC
	Check
14	Conduct pressure test using air conditioning service unit.	If there is a pressure drop during pressure test, ↓ check air conditioning system for leakage.	AR83.30-S-1761E
	Disconnect
15.1	Close vehicle interior shutoff valve using diagnostic system.	Model 447 with engine 780.701/705 If vehicle interior shutoff valve was opened using diagnostic system. Do not yet remove vehicle diagnosis system.
15.2	Remove adapter cables from vehicle interior shutoff valve and connect electrical connector.	Model 447 with engine 780.701/705 If vehicle interior shutoff valve was actuated separately with 12 V. Electrical connection kit	Fig 1
16	Disconnect low-pressure connection (1) and high-pressure connection (2) and attach cover caps to service connections.
	Check
	Risk of burn injuries  , suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning  caused by skin contact with solid components of the exhaust.	Wear protective clothing and safety glasses. Use the extraction system. Move people out of the danger zone.	AS49.00-Z-0001-01A
	Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
17.1	Run engine for approx. 4 min at idle speed and check all systems relevant for the proper operation of the air conditioning system.	Model 447 with engine 254, 274, 622, 651, 654, model 448
17.2	Check function of air conditioning system or cooling system for high-voltage on-board electrical system using diagnostic device.	Model 447 with engine 780.701/705
			AD00.00-S-2000-04E
18	Disconnect charger.	Model 447 with engine 780.701/705	AR54.10-S-1127E

Fig 1: Identifying Electrical Connection Kit (220 589 07 99 00)

Courtesy of MERCEDES-BENZ USA