There are two different types of electic antennas for VY/VZ models. The antenna used in models equipped with the "premium" sound system have distinct up/down control inputs, which can be interrupted in mid-travel - the lower end models do not - it's strictly "up" or "down".
(and fitting the antenna out of a Calais or something might still not work - I haven't tried it, but I'll almost bet the wiring harness is different. I know that in other areas there are significant differences...)
Hope that helps. Cheerz!
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