OK; so i found the solution to test one per one.
It's long, but now, i can detect what car is right.
I downloaded 18 cars
But, even if i have the Trafic Load, some cars are really anywhere.
I have search for my new car for 10 minutes, after that i surrender, i never found it x)
Do you know a program who can Add front of you a car, like the glitch with phone ?
I searched to this but i don't find anything who seem good...
And by the way, thanks for the help, because now the problems are finish !
héhéhé you are the best