If the bus appears but a warning says "Fehler bei Bereichsprüfung" (range check error), you likely missed the font files. The C2's IBIS (integrated information system) relies on specific fonts. Copy all folders from the mod's Fonts directory into the main OMSI 2 Fonts directory.
Most C2 repaints go into Vehicles/[C2_Folder]/Texture/Repaints.
The C2's matrix is controller via the IBM (not IBIS) unit. To make it work: omsi 2 mercedes c2 work
You have installed the mod, but the bus isn't showing in the bus selection menu. Here is the fix.
Let’s diagnose the most frequent technical issues. If the bus appears but a warning says
| Problem | Likely Cause | Solution |
| :--- | :--- | :--- |
| Bus crashes OMSI upon loading | Conflicting script files | Delete the global.cfg in the bus folder and let it regenerate. |
| No engine sound | Missing sound folder or bad path | Ensure the Sound folder is in the main C2 directory and that the .cfg file points to Sound/engine.ogg (not Sound/Citaro/Sound/). |
| Brakes are locked / won't release | Low air pressure | The C2 models pneumatic brakes. Press the . key (period) to build air. Wait for the needle to rise above 8 bar. |
| Dashboard displays "888.888" | Fonts not installed | Re-copy the Fonts folder from the mod. |
| Wipers don't clean glass | Missing particle effects | Download the "C2 Wipers Fix" script from popular OMSI forums. |
Making the C2 work means understanding its unique systems. Unlike the default MAN NL202, the C2 has a push-button start and automated manual transmission (AMT). Install any provided
The C2 is a low-floor bus. "Working" the bus means passenger service.
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