June 20, 2006 Mazda will use the 2006 British International Motor Show (July 18-30) to publicly debut a new version of its top-selling Mazda MX-5 Miata equipped with a powered retractable hard top roof. Now in its 17th year of production and third generation of design, the MX-5 is already the top selling sports car of all time and can be expected to get a significant lease of life with the newfound convenience of an electrical hardtop.