I briefed through the 2006 manual on the top, and from what I read there doesn't appear to be any mechanical adjustments to the latch. When I visually inspected the bow latch assemblies pretty much confirms that as it seems to just bolt in place.

With further reading of the manual seems like it may be one of the sensors, or the Power Top Control Module. But it looks like in order to determine which, one has to start out having to use the tester that the dealer has.

I found this TBS here on the forum, but no info on what it entails.
TBS: 18-Oct-05 - 23-042-05 - Body - Convertible Top Deck Lid Malfunctions I guess I could call the dealer and ask if it's related?