A6 Quattro Wagon V6-3.0L (AVK) (2002)
Service Port HVAC: Description and Operation
NOTES:
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Use only the specified quick coupling connectors resistant to R-134a and respective refrigerant oils.
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Connections for the high and low pressure sides have different outside diameters.
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Before removing the valve or valve stems, discharge refrigerant system.
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Always reinstall cap over service valve (with seal).
Connection with Schrader valve (example)
A -
Service connection (lubricated)
B -
Schrader valve stem
C -
O-ring seal
D -
Cap with seal