Retrieve restored vehicle abroad (EU) without TÜV and registered for two years

Hello, I have transferred a BMW 525i, year 1993 from Germany to Romania and completely restored the whole coach there. Now it is finished and should return, but for two years registered and without German TÜV. Of course I can let the Romanian (called here RAR) do. My question: how can I get the beautiful car back to Germany now. Does anyone have a similar experience? Experience is meant, or legal security, no speculations! For proper answers I’m really grateful!