Silencer issue....
Some German airfields require visiting aircraft to have a noise certificate. This assures a maximum decibel leve at test conditions.
Some UK aircraft have a noise cert (mine does) some dont. If you dont have one...dont worry. They may charge you a slightly higher landing fee, if so, this is usually published somewhere, on the other hand they may not ask to see the certificate. Silencers are only usually fitted to D reg aircraft, they are not generally certified in the UK.
I'm doing a trip along a similar route ending up in the Austrian Alps within the next three weeks, so if I learn anything that may be useful, I will tell you about it later.
Fly......