I imagine this to be a fleet of a public rental car service system and you’re moving towards an interesting design territory.
I like how you create many interruptions in the surfaces with a lot of tension but it is a bit overdone, also in real life the body will look quite bulky.
The sketches are great. Of course the idea of an electric car continuously making sound is great. Do we have to attune the entire body to the whistling or can we gain much more freedom in design and, say, have whistling mirrors. I would want to be able to attune the pitch and volume with a dashboard control.