The discussion:

Recently in the news it was that the girl was stolen and she called from the trunk. How did the signal pass through the metal?
WOW: The wrong question. Would she be found if the kidnapper was not an idiot and searched for the kidnapped woman?
CCZ: If the car was not quite old, then it could get out of the trunk itself.
RR: And if it’s new, I could connect to canbus's and come home.