give us a different address, we have sent units to Germany many times without problems, but of course there is always a chance where custom do not believe this is just a engineering sample.
I see your ticket, just reply with new address and we'll try again.
These are
not engineering samples, but self-contained, electronic products. It's a commercial product you are selling. Don't act stupid. This is no way to do business.
When dealing with the idiots (customs), sometimes it is the only viable route.