I wondered if anyone can point me in the right direction; I noticed a few weeks ago that the volume of my bluetooth calls in my car (57 Plate A3 Sportback) comes out very low and I am now struggling to have a conversation at high speeds / on the motorway. I can't fathom what button I might have touched to activate a reduction in the output volume, but having gone through the manual and even turning up the volume of the call while I'm on it doesn's seem to have worked. The radio/CD functions still have normal sound volume. Thanks.