9. Citroën SM
The Citroën SM dazzled with its sleek, aerodynamic profile and luxurious, Maserati-sourced powerplant. It promised an enticing blend of style and sophistication. However, its complex hydraulic systems and high-maintenance engine proved daunting for mechanics—especially outside its native France. As a result, many owners found more frustration than pleasure in keeping these beautiful cars running smoothly. Read at Hemmings