I think the issue for car companies is that their designs are often quite distinctive. Also their logo’s are quite prominently displayed on the front.
Also remember in shows and movies where ‘suits’ are quite prominent. Armani, or other tailored garment manufacturers are credit-listed.
Even to the point as to which actor was wearing them sometimes.
So check that point again.
Basically what it all comes down to this.
Any manufacturer -of anything- can try to enforce their copyright no matter what it is. Any artist can choose to ignore it. So its who has the money to win if it goes to court.
Also you can factor in which country you live in as well. Some countries just can’t or don’t enforce this stuff for anybody.
To sum up. It doesn’t matter how ‘right’ you are.
Its how far are you willing to go to defend yourself -artist or copyright owner- as it all comes down to money in the end and who is willing to spend it to be
in the ‘right’…