No you’re not 
gimme a moment…
To your original method, add this little tweak
Because, you can tag components
And that means you can check which car collision box you’re overlapping with.
All @Ligazetom was saying, is that it’s usually done the other way around. The car tells the player interaction is possible. Why bother looking at all the actors in the vicinity, when the actors can alert the player to the possibility of interaction. That’s all.