Hello, thanks for the mod, works perfectly and I also fixed the problem of the VDV screen. Gears 5 and 6 now work for me...
You need to go the scripts, Dashboard.osc for the 12m and Dashboard_18.osc for 18m.
Head to "' VDV Pictogramm Getriebe:" and remove the "' Auskommentiert da Voith - wer ein ZF einbauen möchte muss hier nur noch die betroffenen Gänge entsperren!" part, then all the ' on the left hand side so it now looks like this. Works perfectly!
Before:
After:
This will work for both 12m and 18m.
Hope this helps