Saw NSFW_Car for ZIT https://civarchive.com/models/2389310?modelVersionId=2686596 and decided to make a same thing for Illustrious.

Useful prompts:

view from inside car, female upper body in car window, car door in front of female, female is outside car, looking at viewer, seductive smile, presenting breasts, breasts out, breasts in window

For images with male use:

human male, male sitting behind wheel, clothed male

though it is pretty much unstable and tends to also generate a female INSIDE a car, so it better works without him I think.