Okay, all you 'sticky beaks'. Some translated information. It took two years and a million (!) German marks to design the system back in 1984. The operation of the roof is operated by the touch of a button, and the 'C' pillars are stored inside the boot - however, boot space is only reduced by 20%.
Anyone ordering the conversion would have been up money wise for an additional sixty thousand 'D' marks, taking the sticker price of the car to about 300k. , with a waiting period of about six weeks. The Company proudly points out that they have ten firm orders - 3 from German sources, 2 from the States and another three going to the Middle East. That would leave 2 unaccounted for, but there are no details available (my edit). Regards Styria
Do I like the conversion ? Don't know.