We have a 2014 XF S Sportbrake with the later navigation/entertainment system and DAB radio. The navigation system does operate but it displays the scored-out GPS icon, indicating there is no satellite reception. The (non-Jaguar) dealer we bought it from diagnosed the aerial as faulty and ordered one from the local Jaguar dealer but they're having trouble getting hold of one. I spoke to them and they said it was an in-dash part, P/N C2C25795. Everything else I've read suggests that the GPS aerial is actually integrated into the shark-fin aerial on the roof, part number C2D26865LML. Can anyone confirm which is correct? Also out of interest, if the part that goes in the dash isn't the GPS aerial then what is it?