How do I get a Dt. vehicle letter?

Hey guys! I’m still quite fresh here, but I have a problem and hope that someone can help me!? so…. my Suzi RF600R has chewed from Austria (with papers of course), only how can I allow them with us in Dt-land? To the TÜV or Dekra push, let the coat carrier approve (great acceptance? How expensive?) and then to the StV-Amt, get signs, ready!? How does this work normally? Well, that wouldn’t be bad… if there was an e-number on the end pot (neither ABE nor G and the rear tire would not be 180er (let Ösi letter only 160er allowed)! does anyone have experiences with it? Who knows? I am grateful for every help!