I moved this mod from FS22 to FS25 and completely redesigned it.
The side doors now open (requires Interactive Control mod) and are loaded with tools and other things. There are also working headlights on the body.
There is a laptop in the toolbox above the rear wheel on the driver's side. Press M to open the laptop and activate the maintenance function. Here you can repair and customize your cars.
There are many options for wheels, tools in the body, logos on mudguards, fuel tank, air compressor, welding machine, etc.
It is possible to install a Weatherguard fuel tank in the body. You can refuel it on the left side, and refuel cars on the right.