Our corporation reimburses dealers at $70-$75/hr in North America when we pay mechanic's hours (very rare). [this is very confidential information]
Local auto dealerships quoted $100/hr to me for retail automotive work... I conclude that the local dealerships also account for about $85/hr for the mechanic hours and charges the customer a margin of $15.
The take home pay of a mechanic is not going to equal the above, because companies pay for taxes, benefits, downtime, and overhead. But I bet those numbers scare you enough to change your level of expectations/appreciation.