Has anyone upgraded their S60/V60/XC60 audio system to Digital Radio (DAB)? It is an option from 2010(?) onward I believe for these models. I have just been quoted $900 AUD (Australian Dollars) for the upgrade (on a 2011 V60) which seems incredibly expensive for a pretty basic non-labour intensive install. Has anyone had it done or know where to buy the necessary parts? Thanks for your help in advance.