Perform air conditioning system leak test - AR83.30-P-1011MCU

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

Shown on model 451.4 

Fig 1: Identifying Condensation Drain Hose

Courtesy of MERCEDES-BENZ USA

	Removing
	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
	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 maintenance flap
2	Remove front CBS		AR88.00-P-1010MCC
3	Remove rear CBS		AR88.20-P-1900MCC
4	Raise vehicle using the vehicle lift and remove underfloor paneling	Rechargeable drill/screwdriver
5	Lower rear drive module		AR01.00-P-3050MCU
6	Pour contrast medium into air conditioning system	Follow manufacturer's instructions for air conditioning leak detector and for leak detector agent. Air conditioner leak detector
	Checking
7	Inspect condenser filling valve with air conditioning leak detector	If leaks are found, the condenser filling valve must be replaced. See: ↓ Remove/install condenser filling valve	AR83.30-P-5536MCC
8	Inspect intake manifold filling valve with air conditioning leak detector	If leaks are found, the intake manifold filling valve must be replaced. See: ↓ Remove/install intake manifold filling valve	AR83.30-P-5535MCC
9	Inspect condenser with air conditioning leak detector	If leaks are found, the condenser must be replaced. See: ↓ Remove/install condenser	AR83.30-P-6540MCU
10	Inspect expansion valve with air conditioning leak detector	If leaks are found, the expansion valve must be replaced. See: ↓ Remove/install expansion valve	AR83.30-P-5520MCU
11	Inspect refrigerant compressor with air conditioning leak detector	If leaks are found, the refrigerant compressor must be replaced. See: ↓ Remove/install refrigerant compressor	AR83.55-P-5300MCU
12	Inspect condensation water drain hose (1) with air conditioning leak detector	If leaks are found, the evaporator must be replaced. See: ↓ Remove/install air conditioner housing	AR83.30-P-5200MCU
13	Inspect refrigerant lines with air conditioning leak detector	If leaks are found, the refrigerant lines affected must be replaced. See: ↓ Remove/install refrigerant lines at refrigerant compressor	AR83.30-P-7810MCU
		Remove/install refrigerant line between refrigerant compressor and evaporator	AR83.30-P-7811MCU
		Remove/install refrigerant line between evaporator and condenser	AR83.30-P-7812MCU
		Remove/install refrigerant line between condenser and refrigerant compressor	AR83.30-P-7813MCU
	Install
14	Position rear drive module		AR01.00-P-3050MCU
15	Lift vehicle using the vehicle lift and install underfloor paneling	Rechargeable drill/screwdriver
16	Install CBS rear		AR88.20-P-1900MCC
17	Install front CBS		AR88.00-P-1010MCC
18	Install maintenance flap