New MINI Convertible Coming To Detroit Auto Show The next-generation MINI Convertible is set to bow at the 2009 Detroit Auto Show , with models arriving in dealer showrooms just in time for warm weather cruising next spring. The most noticeable revision on the new drop-top is the lack of intrusive roll bars found on the current model. Instead, the new MINI 'vert gets a single pop-up bar that deploys automatically in the event of a rollover. A multi-stage convertible top also is said to allow a sunroof mode as well as full-open motoring, although it still stacks on the rear deck in so-called "pram" fashion, neatly eliminating pesky rear visibility. [Autoexpress ]