Adding DAB+ support to Australian Volkswagen Golf Mark V and VI, Jetta, Passat and other similar models is reasonably straightforward with the introduction of new (albeit hard and expensive to source) headunits.
The version tested to work here in Australia is the 1T0035686C (1T0 035 686 C) with a Hardware Level of HW:09 and running software level 5238. This unit is a stock RNS 510 with LED screen, 40GB hard drive and is the latest available model from Volkswagen.
There is another version which is the 1T0035686D (1T0 035 686 D) and the difference between them is that the C version has Western European maps installed and the D version has Eastern European maps. Be aware that the version of the firmware prior to 5238 is buggy.