Morning Dave
Welcome to the Forum
In my long car owning history I have never been a convertible fan in fact both my X5's don't even have sun roofs 😅Air Con rules for this old bloke.
Having said that I just did a quick general search on ISTA parts section and from what I can see you may need the complete release mechanism ?? When you brought the parts did you use www.realoem.com and your Vin number ?
Dave
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Greydog ·