If you have completed the tour in Bjornholm right ahead of you is a shopping basket icon that is the Vehicle Shop. Simply walk into it and tap RB to open the Vehicle Shop Menu.
The menu is divided by Category and Brands - hit RB or LB to see the Brands Menu.
The game has the following Brands:
The following manufacturer is basally the Farming Simulator 15 version of the Acme Industries found in the Roadrunner cartoons from from the Looney Tunes and Merrie Melodies series of cartoons.
So yeah, they made it up because the bottom line is that there had to be a catch-all manufacturer slash company to allow for adding in the not-so-sexy stuff that falls into the utility category...
The following manufacturers are added to the game by DLC addons...
FarmTech - United States
These brands offer hardware that is divided by Category and includes:
In addition to the above there are also specials that the shop runs that can be viewed under the Sales Marker - if there are any active. Note that for now you do not need to buy anything - you already own a significant amount of hardware - so go find out what you own!