Refrigerant Lines At Quick-Release Couplings, Installing

Refrigerant Lines At Quick-Release Couplings, Installing

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






Risk of leaks

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

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






- 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 -. Refer to the Electronic Parts Catalog.

• Follow the instructions for installing the O-rings. Refer to => [ Refrigerant Circuit O-rings ] Refrigerant Circuit O-rings.

- Coat the O-rings with refrigerant oil before installing. Refer to => [ Refrigerant Circuit O-rings ] Refrigerant Circuit O-rings.

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

- Thoroughly clean refrigerant lines - C - and - D - around the connection area and check for damage.






- Press refrigerant lines - C - and - D - all the way into quick-release couplings - A - and - B - so that they are free of tension.

• The procedure for connecting the refrigerant lines installed in the area under the left headlamp is described here. The same procedure applies for connecting the refrigerant lines installed in the area of the A-pillar under the left fender.

Check for correct installation of the refrigerant lines.

• Try to disconnect refrigerant lines - C - and - D -; 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.






• In the case of quick-release coupling - D - (gradual introduction), ring - E - must come out of quick-release coupling - D -, when locked refrigerant line - C - is pulled in the direction of the arrow after assembly. Then the ring - E - can be removed from the refrigerant line - C -.

• Install refrigerant pipes 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).

- Install the remaining components.

- Evacuate and fill the refrigerant circuit.

- Check the event memory of the Climatronic control module (J255) , and erase any displayed malfunctions 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 Operating After Filling Refrigerant Circuit ] A/C System Operating After Filling Refrigerant Circuit.

• Note the information regarding operating the A/C system after filling.