Grandit,
While there is quite a lot going on with the mechanism of your roadster's top operation, they are not the smoothest or the most quiet when cycling.
It is quite common for the storage compartment lid to strike the 5th bow loudly (the bow that is below the rear glass) during opening of the top. The bungee cords that keep that 5th bow vertical stretch with age and don't always pull that 5th bow out of the way of the opening storage lid.
But what you are describing is not the same.
You may have a hinge point that needs some lubrication (most all of them can be found and lubricated by stopping the roof opening or closing at several points during the tops full cycle. A light application of silicone grease applied with a small water colour brush at each joint may solve your issue. DON'T put too much grease on or you stand the chance of staining the top cloth or headliner. After all your car is11 years old and may never have been done.
If the problem still hasn't gone away, post a short video so we can hear and see where and when the pop occurs.
Good Luck, welcome to the club, and enjoy your new ride!
Gene
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