24. 1993 Isdera Commendatore 112i

Notable Features: Active rear airbrake, automatically adjustable ride height, only one prototype was ever made

Complex Says: Isdera had production plans for this Mercedes-engined car, but unfortunately went into bankruptcy before it could be produced. Designed by former Porsche designer Eberhard Schulz and his sons, the styling was at once futuristic and comforting -- not an easy feat to achieve.