The retractable hardtop on the BMW M3 Convertible.
Enjoy the freedom of open-top driving in an instant. The retractable hardtop disappears in just 22 seconds, leaving you free to feel the sun on your skin along each sporting curve and open straight. Even a cloudy sky can't spoil your driving pleasure. The roof simply closes again as swiftly as it opened, quickly emphasising the vehicle's unmistakably athletic aura. After all, the BMW M3 Convertible just demands to be set in motion - whatever the weather.