The C's rear
aerofoil extends or retracts electronically.
The neat
aerofoil extends at 45mph and retracts at low speed, although there's also a button next to the steering column so you can extend it to achieve the full peacock effect at will.
Not exact matches
There is a rear
aerofoil, that can be
extended in several stages, as an important element of the active aerodynamics.