Hint :
car-charm
(don't want to outright give away the answer and spoil anyone's the fun...of pulling out one's hair and screaming to the screen in a rageful, desperation filled frustration...however. if the answer remains shrouded in mystery, I can provide more hints, so let me know)
...no idea, based on what logic, one is suppose to derive the conclusion...but there you have it...
...is someone figures out the logic behind it, I would love to hear it...