Hi Danielsam,
We as Dutch Vodafone users/mods, admins are not able to tell you what's causing the problems with the German Network connection. The Customer Service of Vodafone Germany will be able to help you.
Just one thing I noticed, you are using two different APNs; web.vodafone.de and event.vodafone.de
I think the combination of these two APNs is causing your connection problem!
Kind regards!