Don’t you like the music, that comes from the radio? You wished, you could add your favourite songs?
You can! And it’s very simple.
Go to your Steam folder and follow this path:
Steam\steamapps\common\Car Mechanic Simulator 2021\Car Mechanic Simulator 2021_Data\StreamingAssets\Music\User
and add your songs there.
In “Car Mechanic Simulator 2018” you had to put .ogg data in the game folder. But not with the 2021 Version! I mean, you still can, but why using .ogg data if you can use .mp3, right?!
For maximum fun, I advice to use only Rock and Metal! Have fun fixing cars, while headbanging!