Some info i found online
.the Eole was designed entirely by computer, bypassing the normal stages of such a car’s creation. Geoffrey Matthews who came to Citroën from PSA-owned Chrysler UK did the original drawings from which the computer worked. Eole was based on a CX platform and achieved a CD factor of 0,17 – approximately half that of the CX thanks to fully enclosed wheels. The car was fitted with no roll, active suspension that automatically lowered the ride height at speed. Following these trials, the decision was taken to equip the CX successor with an active system.
Characterized by covered wheels and large headlights, the Eole was designed as an aerodynamic estate car capable of seating four people in comfort. Hydraulics linked to the steering system allowed the wheel covers to open outward when the front wheels were turning. At high speeds when steering was minimal and short, the covers remained closed…