Hi Perotinus,
I recently saw you added the automatic variant and decided to try it, but I have a problem: there seems to be something wrong with the transmission as I cannot start uphill.
I am using Grundorf's ramp to Nordspitze Bauernhof for my tests.
If I stop on the ramp, then I cannot get moving again, however, if the bus is moving at 0,1 km/h, it can easily pick up speed,
The very strange part here is that it has no problem at all in starting uphill with the Reverse gear.
The manual transmission works great, I've been using that since you released this bus a long time ago 
I looked into antrieb_constfile_auto and tried to modify the wandler lambda and my curves, but gained nothing. The file is almost identical to that of the O407 and that bus works great!
Could you please look into it? The fact that it works in reverse and in Drive from 0,1 km/h makes me think there's an issue in some scripts and it's not the engine that isn't powerful enough.
Regards,
Fabrizio