I have this problem as well - but the spoiler does actually raise and lower (you'll have to have someone follow you - or be really bendy - to see). With mine, once the spoiler activates the light turns on. That light says one of two things, either it didn't raise or it didn't raise fully.
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'06 Cayenne Turbo S, Beige Metallic/Tan
Ex - '99 Arctic Silver, Red Interior, Silver Top
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