Do you need an International Driving Permit for Germany?

The US Embassy in Germany states that visitors holding a valid US driver's license may drive in Germany for up to six months without obtaining a German license. There is no legal requirement for a short tourist stay to carry an IDP.

An IDP remains worth carrying for practical reasons. It is a standardized translation, which removes any ambiguity during a roadside stop with an officer who does not read English, and some rental agencies ask for one as a matter of company policy regardless of German law.

If you stay beyond six months the picture changes: at that point you are expected to hold a German license, and an IDP does not extend the period.

An International Driving Permit is a translation of your licence into a standard multilingual booklet, issued under the 1949 and 1968 road traffic conventions. It is not a licence, and it is never valid on its own: you carry it with your own licence, and police expect to see both.

It is issued against the vehicle classes already on your home licence, and it never adds one. If your licence does not cover motorcycles, an IDP does not let you ride a scooter in Germany; if it does not cover a heavier vehicle, the permit will not cover a camper or a minibus either. The permit restates what you already hold, in a form the local authorities can read.