The vacuum locks haven't worked on my car in some time, but since it's a coupe it's not a big deal. But now the key won't turn in the trunk at all. I don't think it's a vacuum issue because the key just flat won't turn in the lock. I even ordered a new one as the old one was very worn, but the new one works great in the ignition and doors, just still won't turn in the trunk lock. Any ideas? Can the dealer open it for me or are they dependent on a locksmith too? If I DO get a locksmith to open it, what should I look for and avoid doing to repeat this?