Check all of your paperwork for disclaimers. If it's parts they're waiting for, they have no control over that. You just need to be patient. Now, if they're just holding your car hostage, that's a different story.
Try to get a refund, then tow your car to a more trusted garage. If they won't bend, talk to a few lawyers, get their opinion & go from there.
Master mechanic are guaranteed for 3 months.
18 to 36 months depending on your speciality.
After 9 months time of pregnance has been finished in the shape of child
you need at least six months of hands on traning!
An aviation mechanic must get 18 months of practical experience with either power plants or airframes, or 30 months of experience working on both at the same time. Or graduate from an FAA approved school. http://www.faa.gov/mechanics/become/basic/
2 months 8 days
Your mechanic has the starters in his hand. How can a website know more than he?
Depends on your genes and how long... I would say 50-55 years
a few months
The strongest DPS at this time is the Mechanic. However this will soon change, in the Chaos patch they will be nerfed and their damage reduced. The Chaos patch isn't coming out for a few months though, so no worries if you want to make a Mechanic now.
6 months
11 - 12 months