What aerial should I have

[graynada]

I have a 1996 A8Q which came with the Bose Stereo and in car phone but has an after market manual telescope aerial fitted. From wiring diagrams I have seen it shows the car having a motorised aerial, however all the other A8s of the same era I have seen have had fixed black aerials with what looks like some kind of wire spiralled around. Does anyone know what aerial I should have?