55. 2003 Citroën C3 Pluriel
The Citroën C3 Pluriel is a variant of the C3 supermini built by Citroën. While the regular version of the C3 is an efficient little car, the Pluriel variant was a disaster. The roof was removable to turn the vehicle into a convertible, but there was no room inside the car to store the roof pillars. In the event of a sudden rainstorm, the occupants were getting wet. There was a retracting fabric top that ran along the middle of the vehicle’s top, but it was prone to leaking and offered little shelter from the rain. If the roof design was built better, the Pluriel wouldn’t be on the list, but making a convertible that you can’t put the roof back on mid-trip is unforgivable.