openHABian hassle-free openHAB Setup

Hi all,
With this new openhabian version i decided to try openhabian again. With a clean installation, no upgrade from an older openhab install. (did an backup as described in the docs)
Unfortunately i have a problem with Z-Wave. My Z-Wave Serial Controller remains offline.
Looking for the cause, i found that the /dev/ttyAMA0 does not have the right access rights.

[18:37:25] openhabian@openHABianPi:~$ ll /dev/ttyAMA0
crw--w---- 1 root tty 204, 64 Jul  5 13:50 /dev/ttyAMA0

Performing the command:

[18:41:13] openhabian@openHABianPi:~$ sudo chmod 666 /dev/ttyACM0
[18:41:31] openhabian@openHABianPi:~$

does not change anything?!
With the normal hand installation of openhab 2.2.x this does work well.
Does anyone has an idee what causes this behaviour of a sudo command?
I thougt the user openhabian was default added to de sudoers…

Mayby i am overlooking something…