(Import) We highly recommend making an appointment with the LBV (German state authorities for road construction and traffic) before visiting the car registration office.
Without an appointment expect several hours of waiting time.
https://www.lbv-termine.de/LBV/
Registration of import vehicle (used vehicle), for which you will need the following documents:
Motor vehicle tax SEPA direct debit mandate / Download link:
http://www.hamburg.de/contentblob/4273860/data/formular-sepa-mandat-kfz-steuer-ab-010314.pdf
In order to levy motor vehicle tax, a SEPA mandate completed by the keeper is required when the vehicle is registered.
Identity card / passport: Passport with current registration confirmation or an identity cardCertificate of insurance – Electronic insurance confirmation number (eVB number). The car insurance provides this number with the insurance proposal before registering the car.