Convert your driver's license
Non-EU licenses are valid for 6 months after you register. After that you must convert (umschreiben) — depending on your country this may require theory/practical tests.
Official source1Check the rules for your country
Annex 11 countries (e.g. Japan, South Korea, some US states) convert without tests; others need theory and/or practical exams. Check before your 6 months of validity run out.
Foreign driver's license
Official source2Apply at the Fahrerlaubnisbehörde
Book an appointment, bring your license with a certified translation (ADAC offers this), passport, biometric photo and Meldebescheinigung. Fee ~€36–45 plus any required tests.
Foreign license + certified translation · Passport · Biometric photo · Meldebescheinigung
Official source
Procedures vary by city and office and can change. This is general information, not legal advice — always check the official source.