Expiry of type-approval

Hi, what happens if my vehicle’s type approval expires (at the same time 3 points in Flensburg andund). As an example, I would like to mention the underfloor lighting: You are caught by the police, your type approval expires. How does it expire exactly? Immediately on the spot? If so, you can still drive home/to the TÜV? What do I have to do to get a new type approval? How much does it cost? Would it be enough in my case if I were to drive the vehicle Have bottomlightkit removed and apply for new Tüv? Would be cool if one of my “little” questions could answer me in advance. MfG Sonny