Hey there! It's me again after some time. I got a reply on some issues in November and tried out a few things (including a firmware update). In the end things got worse...

Now the gimbal movement is sometimes totally out of control. It moves around like crazy and even locks itself up.

I read on some posts that there where hardware issues on some osmo  cameras manufactured in october. Since I got this one on my birthday in  early november it could be that this one is a bit broken too.

Could you please instruct me how to send it to you to fix the problem?
Thanks!

Sorry you are experiencing difficulties, here is the link to get started with the RMA process.
Also here's the phone number for Germany.
http://www.dji.com/support
GERMANY
+49 (0) 9771-177 3000
Mon-Fri 9:00AM - 3:00PM (GMT+1)