The first Mercedes-Benz Unimog U 1200 was built in 1976 and the last U 1600 from the heavy series rolled off the production line in 2002. The Unimogs U 1200, U 1400 and U 1600 had a 6-cylinder engine.

The FS-Unimog has the following features:
- Available as U1200, U1400 and U1600
- Price: from $23,000 to $54,610
- 6 engine versions from 125 - 241 hp
- Top speed: 80 kph
- 7 platform configurations
- Capacity: 1500 L - 3800 L
- Front and rear hydraulics configurable
- 18 real Unimog colors
- 28 tire-rim combinations
- Passenger option in multiplayer

Further configuration options:
- Air conditioning from Behr on the roof
- Forestry cage
- Corn grill
- Front bull bar
- Bull bar with dual headlights
- Bull bar on the roof
- None, one or two beacon lights
- With or without Unimog side stickers
- Three exhaust variants
- 4 additional roof lights
- Sun visor
- Monitor
- Precision Farming ready
- Horn
- Front lamp protection grid
- Horseshoe on the radiator grille
- Color configuration of the cover
- Different colors and materials for the flatbed floor

The Unimog has additional working dashboard warning lights compared to other FS vehicles:
- Separate indicator warning light for trailers
- Tipping
- PTO shaft switched on
- Rotating beacon
- Fuel reserve light
- Gear shift indicator (the 4 lights in the center of the dashboard)
The indicator lights in a plug-bulb design were custom-made for the Unimog.

A separate truck bed concrete weight is available for purchase in the shop category "Weights":
- Price: $1,000
- Weight: 1,400 kg

The doors, the rear window and the roof hatch can be opened by moving the mouse while holding down the mouse button (mouse control).

The cover of the Unimog can be opened with the "N" key, the cover of the trailers with the "Y" key.