Tache and Flame, I understand where both of you are coming from. Because about 2 years ago I was in the same situation as Tache and yes I did work for free, and if you asked me last year and about working for free, I would totally agree with you both. However things has change, and I do understand where MATMAX and SC are coming from.
As I see it 'working for free' has two definitions:
A) Doing work experience, where mainly you are only taking an 'active interest' and performing only the basic tasks, most likely with supervision and providing the extra hand if needed.
B) Performing the jobs a mechanic with do.
If B) or both, is what both Tache and Flame define it as, and than yes you are downgrading the industry, both in terms of wages and jobs.
Tache, finish you course and than start looking for a UNLICENCE MECHANIC (NOT 'A' LICENCE) job and after a while, if no luck and go join an different industry.
If you still want to go to university next year, may I suggest to do a degree in mechanical or electronic engineering.