ModemManager will not start on raspberry pi jessie lite

[marcel]

Hey, I got like the a very similar error as in:
https://lists.freedesktop.org/archives/modemmanager-devel/2015-April/001885.html

but I got no /usr/share/dbus-1/system-services, as those files are in 
/etc/dbus-1/ on my system

just with ModemManager I get

ModemManager[760]: <info> ModemManager (version 1.4.0) starting in 
system bus...
ModemManager[760]: <warn> Could not acquire the 
'org.freedesktop.ModemManager1' service name
ModemManager[760]: <info> ModemManager is shut down

whereis ModemManager gives:
ModemManager: /usr/sbin/ModemManager /usr/share/man/man8/ModemManager.8.gz

I got my org.freedesktop.ModemManager1.service in 
/usr/share/dbus-1/system-services/

service modemmanager start gives:
Failed to start modemmanager.service: Unit modemmanager.service failed 
to load: No such file or directory

I just can't figure out what may be wrong, is there anyone who could 
help me?

Thanks