An update to the situation: I returned from the holiday break to hopefully find my car working. The head hasn't come off, and the mechanic is trying to spin it free. Unfortunately for me, I don't have time to wait for it to come out, and the shop doesn't want to take the head off due to a lack of knowledge on the subject. It looks like it is off to the dealership for me, at least Mercedes tows it there for free :/.