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 difficult and expensive to source) headunits. DAB and DAB+ are available on all models of the DAB RNS 510 headunits and will work in any country with DAB and DAB+.
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 at the time of fitting in late 2013.
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 versions of firmware prior to 5238 are buggy.
You will need to fit a suitable DAB/DAB+ aerial to your car to pick up DAB/DAB+ signals, there is a new FAKRA connector on the rear for this signal and the existing aerials are used for FM and AM.