A method performed by a vehicle feature evaluation system (1) for enabling evaluation of a simulated vehicle functionality feature. The vehicle feature evaluation system determines (1001) in relation to a road-driven vehicle (2), with support from a tracking system (5), an orientation of a head-mounted display (4), HMD, adapted to be worn by an occupant (3) on-board the road-driven vehicle. The vehicle feature evaluation system further determines (1002) a simulated vehicle functionality feature to be evaluated in the road-driven vehicle. Moreover, the vehicle feature evaluation system provides (1004) in real-time to a HMD display (42) of the HMD, taking into consideration the HMD orientation, a virtual representation (7) of the simulated vehicle functionality feature superimposed on a real-time real-world video stream (6) derived from real-world image data captured with support from one or more forward-facing cameras (41) provided on the HMD in eye-position of the occupant.