Hello Have a question: I have a 89 Pontiac Trans Am at the moment unsubscribed. without Tüv and AU. Can I just leave the Ponti still 5 years, without doing Tüv and AU, then the car letter falls down. Then the Ponti gets a 07 number in 5years without a good car letter. Or I have to log in once a year and after 2, 3 days again unsubscribe so that the letter does not forfeit. They told me what if the car is longer than a year not registered, is the KFZ letter ni cht more valid and you have to make the registered a full acceptance. But the Ponti should not be registered anymore, est again with 07 number, in 5 years