Okay. Nothing more.
Having sunk a few hours into this I left feeling pretty dissapointed. It striked me as a solid concept and the sale price of $10 made me purchase outright without doing much resarch into the game. Something which I rarely ever do !! In hindsight I wish i'd watched a let's play or a WTF is.
It's essentially a very basic simulation, stripped down the the bare minimum of mechanical engineering. A true mechanic will see this game as laughable as it feels very much like a simulator for young teens. After a few hours gameplay things got rather tedious, clunky controls and repetitive gameplay left me with nothing more than a feeling of … meh. The game however is very asthetically pleasing, even on low settings it has a very nice look to it.
To conclude, if you're looking for a basic game to take up a couple of hours, why not go for it, but if you're looking for a fluent game to hold your interest each time you open up steam, I doubt Car Mechanic Simulator will be the one you choose.