11. 1992 Citroën XM
The 1992 Citroën XM was renowned for its hydropneumatic suspension system, featuring grapefruit-sized metal spheres containing nitrogen that acted as both springs and shock absorbers. This system, enhanced by the Hydractive electronic control, adjusted the ride quality based on driving conditions, offering exceptional comfort. However, the complexity of its electronics often posed challenges for mechanics, leading to maintenance difficulties. (en.wikipedia.org)