Refrigerant Lines, Disconnecting From Quick-Release Couplings And Connecting: Installing

Installation is done is reverse order, observe the following:

Fig 1: Installation Is Done Is Reverse Order, Observe Following

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CAUTION:

Danger of leakage.

The couplings -B- and -C- on the refrigerant line -D- with inner heat exchanger must be replaced each time the refrigerant line is opened.

-- Pry the couplings -B- and -C- using a screwdriver -A- out of the refrigerant line -D- with inner heat exchanger -arrow-.

-- Thoroughly clean all parts of the refrigerant line connections (for example, using Cleaning SolutionD 009 401 04).

Fig 2: Identifying Parts Of Refrigerant Line Connections

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-- Check the connector -A- for the refrigerant line with inner heat exchanger for damage.

-- Replace the O-rings -B and G-, the support rings -C and F- and the couplings -D and E-.

NOTE:

Follow the instructions for installing the O-rings. Refer to REFRIGERANT CIRCUIT SEALS .

-- Coat the O-ring seals with refrigerant oil prior to installation. Refer to REFRIGERANT CIRCUIT SEALS .

-- Press on the couplings -D- and -E- until this audibly latch into the refrigerant line with inner heat exchanger connector piece -A-.

-- Thoroughly clean the refrigerant lines -A- and -B- around the connection area and check for damage.

Fig 3: Identifying Refrigerant Lines -A- And -B-

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-- Install the refrigerant lines -A- and -B- all the way so that they are free of tension.

Check for correct installation of the refrigerant lines.

Try to disconnect the refrigerant lines -A- and -B- ; the stop must be felt.
The pins -B- on the retaining ring must be visible on the quick-release coupling, version -A- (installed at SOP) when the locked refrigerant line -C- is pulled in direction of -arrow-.

Fig 4: Identifying Quick-Release Coupling Versions
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On the quick-release coupling -D- (running change from MY 2010), the ring -E- must come out of the quick-release coupling -D-, when, after assembling, the locked refrigerant line -C- is pulled in direction of -arrow-. Then the ring -E- can be removed from the refrigerant line -C-.

NOTE:

Install the refrigerant lines such that they are not strained.

Check installation position of refrigerant lines to the quick-release couplings (they should not come in contact with other components).

-- Evacuate the refrigerant circuit and fill it. Refer to USING SERVICE STATION . For additional information, refer to OVERVIEW - REFRIGERANT CIRCUIT, NOT OPENING THE REFRIGERANT CIRCUIT, VEHICLES WITHOUT HIGH VOLTAGE SYSTEM and OVERVIEW - REFRIGERANT CIRCUIT, OPENING THE REFRIGERANT CIRCUIT, VEHICLES WITHOUT HIGH VOLTAGE SYSTEM (Refrigerant R134a, Servicing; Refrigerant Circuit, Using Service Station).

-- Turn on the ignition.

-- Install the remaining removed components.

-- Turn on the ignition.

-- Check the DTC memory for the Climatronic Control Module -- display and control head and erase any displayed malfunctions, if necessary using the Vehicle Diagnostic Tester in the "Guided Fault Finding " function.

-- Operate the A/C system after filling the refrigerant circuit. Refer to A/C SYSTEM, STARTING OPERATION AFTER FILLING REFRIGERANT CIRCUIT .

NOTE:

Observe the information regarding operating the A/C system after filling. Refer to A/C SYSTEM, OPERATING AFTER CHARGING , (Refrigerant R134a, Servicing; A/C System, General Information). After charging the A/C system before activating the A/C system.