Quick-Release Connections On Refrigerant Lines
The quick-release coupling connectors may be unlocked and opened only if the refrigerant circuit is empty.
This illustration shows the quick-coupling connection with a refrigerant line with an inner heat exchanger that is installed in the Audi A4 from MY 2008 and on the Audi A5 Coupe from MY 2008. Refer to Refrigerant Circuit (vehicle-specific Service Information). (vehicle-specific Service Information).
The retaining ring -A- must be opened using, for example, the Air Conditioner Couplings Release Tool :T40149 in order to remove the refrigerant line -D-. Refer to Refrigerant Circuit (vehicle-specific Service Information). (vehicle-specific Service Information).
The quick-release coupling connectors -B and G- are to be replaced after removing the refrigerant line with the respective support ring -E- or -H- and O-ring -F or J-. Refer to Refrigerant Circuit (vehicle-specific Service Information). (vehicle-specific Service Information) and the Parts Information).
A - Retaining ring (inside the quick-release coupling connector, high pressure side)
B - Quick-release coupling connector with retaining ring "high pressure side"
C - Refrigerant line with an inner heat exchanger
D - Refrigerant line "high pressure side"
E - Support ring "high pressure side"
F - O-ring "high pressure side"
G - Quick-release coupling connector with retaining ring "low pressure side"
H - Support ring "low pressure side"
J - O-ring "low pressure side"
There are different quick-release coupling versions -A and D-. The refrigerant lines -C-, for example, can unlocked and removed using the Air Conditioner Couplings Release Tool :T40149/1 in the same manner for both versions of the quick-release couplings.
The check pins on the -B- quick-release couplings -A- installed at SOP are visible -C-, when the locked refrigerant line -C- is pulled in the direction of arrow.
Beginning with MY 2010, as a running change, the quick-release coupling -D- and the refrigerant line -C- are being installed in the same manner as the quick-release coupling -A-. If the refrigerant line -C- is pulled in the direction of arrow after assembling, the ring -E- will come out of the quick-release coupling -D- installed and will show that the retaining ring -F- is completely latched to the refrigerant line -C-. Then the ring -E- can be removed from the refrigerant line -C-.