Good luck on the lights I don't have any wisdom to add there but wanted to mention that you might want to check into transferring the warranty from North America to Europe. Maybe it's a non-issue but it would be terrible if you assumed it was transferrable when it wasn't.
If you haven't purchased yet, speak to your advisor and see what you can do. Also, look into if you will have to pay taxes in Germany, just make sure you know your total cost before you act.
Follow this thread
(regarding tail lights), seems as though one of the members has done something similar.