Headset Panel
WARNING: This page is about a different car, the 2010 Volvo V70, 2009 Volvo V70, and 2008 Volvo V70. However, it is still accessible from the selected car via links, so may be relevant.
The Audio module (AUD) has outputs for connections to the left and right headset panel. The headset panels are located by the rear section of the center console. Each headset panel has a control for volume, next track, previous track and source.