I thought the DAB aerials were embedded in the windows like the ST? I asked the dealer about after market aerials and whether the aerial on the roof did the DAB or whether it was just AM/FM and for the GPS. Dealer said I was right and the DAB aerials were still in the windows like the ST.
I’ll have to have a close look at my RS in the daylight at the rear side windows.
I do still quite fancy a shark-fin aerial but I could be tempted into trying one of these if the price is right.