The metal aerial bit is only used for FM and MW radio. The DAB gubbins is usually a wide metal strip integrated into the front or rear screen and the GPS receiver is usually in a pod on the roof. Easy check, unscrew the aerial and see if everything still works. I'm guessing it all will, you'll just get less good signal on regular radio.
2005 Focus C-Max 1.8 Petrol Ghia + Sony 6 disc, 2007 tail lights, Led bulbs all over and HID front fogs.