TV, Radio and sat nav all work fine, however, the antenna cover is loose and I fear water ingress will start to give me problems. The unit is securely fastened to the roof, just the cover is loose.

Does anyone know how the cover is fitted, can they be prised off in situ, do they just pop on?

Any help would be appreciated, thanks

I think they are all part of one unit . The dealers fitted new one to mine. fitted from outside with sealing grommet and tightened from inside of car under rear roof lining.