Being German myself, I've noticed that the German license plates in Hanna have quite a strange format, it's something like
whereas the common format is
Where the first part (up to three letters) stands for the city or district that issued the license, and the second (two letters) and third (one to four digits) identifies the actual license.
While there are some special formats for license plates, the one used in Hanna did never occur to me.
Are there any in- or out-of-universe explanations for the format? I thought about legal issues when using real license plates, but there are other productions using real license plates, too, therefor this does not seem to be a general issue. I did not care about it all the time, but whenever I did, all cars seemed to have those license plates, hence I tend to rule out the format being reserved for "officials", too (Hellers team had one of those license plates, too, after all).
(Googling the issue yielded no results, too, but it may have been the wrong search terms)