You need to have a valid driver’s license and an ID or passport to drive a SIXT rental. If your license is in non-Roman characters like Chinese or Greek, you will also need an international driving permit.
It is generally possible to rent a car one-way between SIXT stations in Berlin and in Germany. An additional fee may apply.
The minimum age for car rental in Germany is generally 18, although some car categories have a higher rental age. An underage driver fee applies to those under 23.