I will drive or push my car in for my mechanic. He does the best he can with the garbage they give him.No. Not at all. Breakdowns are frowned upon, but as long as it does not keep happening for the same reason, nothing is likely to be said or done. Just follow procedure as directled dilligently and don't take chances if you don't have to. Only if you are dishonest or a total screw-up will they be looking for a reason to fire you. Competent mechanics who are willing to work these hours are a rare commodity.