models also include a special climate

In Convertible models, the top can be raised and lowered when moving up to 25 mph, and can go from up to fully down in just 22 seconds. The arrangement doesn't inhibit trunk space as some retractable hard-top systems do. In either model, there's also an opening with expandable bag that allows long items like a snowboard or golf bag to fit through. The silhouette of the 1-Series convertible is much like that of the coupe when it's up. A slightly different trunklid design in convertibles helps accent the design and improve visibility. Convertible models also include a special climate-control mode that reacts to the level of sunlight, and optional Boston leather has a sun-reflective treatment that helps reduce temperatures on hot days. An available wind deflector helps bring a quieter, less turbulent interior at highway speeds. Whether in the coupe or convertible, there's plenty of space to sprawl in the front seats, though the back seat is quite tight.