locksmith? or car dealership? or something else?

So, I am having a mechanical problem with the lock on the mini. (I'm not sure if someone tried to fuck with the lock or if this is some kind of general leftover metal/plastic fatigue or what.)

Is this something I should see a locksmith for? Or the mini dealership? I wouldn't expect a regular mechanic or body shop to deal with it. (It's got a remote unlocking key thing.)

Of course, I may end up taking it to the dealership anyways - the airbag light was on today. If it stays on, I'll probably want them to figure out what's up.