Connections of refrigerant lines to the components (different versions)

WARNING: This page does not describe the selected car, but rather 17 other vehicles, including the 2009 Audi S4, 2009 Audi A4, 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

In January 2003, the connections between the refrigerant lines and the various components (condenser, evaporator etc.) were converted from radial/axial sealing to radial sealing (gradual introduction). A further few thousand vehicles were still installed with the old type of connection in April/May 2003.
It is only permissible to combine components with the same type of seal and the corresponding O-rings (different versions) .
Reliable sealing of the joints cannot be ensured if components with different forms of sealing are installed.
Joints with radial/axial seal (installed up to January 2003, gradually discontinued)

Fig 1: Identifying O-Ring, Component & Refrigerant Line

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Component - A - (e.g. condenser) with connection for radial/axial seal
O-ring - B - for connection with radial/axial seal
Refrigerant line - C - with connection with radial/axial seal
Joints with radial seal (as of January 2003, gradual introduction)

Fig 2: Identifying Component, O-Ring, Refrigerant Line & Sleeve

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Component - A - (e.g. condenser) with connection for radial seal
O-ring - B - for connection with radial seal
Refrigerant line - C - with connection with radial seal
Guide sleeve - D - (plastic) at connection with radial seal