General advices Car Mechanic Simulator 2015 Guide
Last update: 11 May 2016
Points gained at the beginning of the game should be exchanged for diagnostic tools, only after that you should focus on upgrading your repairing abilities. Making unscrewing and disassembling parts faster seems much less important, but it is a quite nagging action so less patient players should start with that.
You shouldn't grind your experience points by, for example, repeatedly unscrewing and mounting a single part. After you reach 3000 points you gain much less points for such action and you won't get any money for that which can be used for unlocking new diagnostic path or garage.
At the beginning you should pick as uncomplicated tasks as possible - they will allow you to quickly gain experience points (100 for each completed repair) with not much work.
Remember to use financial aid wisely - you get it only once!