Okay, a two-for-one here. Both stories aren’t mine but are from my driving instructor who shared them with me when I was studying to get my license.
In Europe, you learn driving in private driving schools, which can take upwards of a year or more depending on how good you are. All such schools that I know of have huge decals on their cars and often a sign on the roofs clearly marking them as vehicles driven by potential newbies who have never done something like that before, so people should be a bit more patient around them and expect mistakes to be made.
One day during a lesson, a cop pulled [Instructor]’s car over for something. (I don’t remember if he told me what for.) The cop actually walked to the driver’s side of the clearly-marked driving school car and asked the student for their licence and registration! The scared-to-h*** student basically yelled at him that they didn’t have a license. [Instructor] had to get out and talk to the cop.
In the second one, [Instructor] was driving with another student when it started raining heavily. They turned on the front fog lights to see better. (This was allowed. Only the back one would have been forbidden.)
On their way, though, there was some sort of police exercise being held, and a baby-faced newbie cop pulled them over because, according to him, the fog light was forbidden. He argued with [Instructor] to the point that [Instructor] got out, opened the trunk, and pulled out the German law book about traffic laws, telling the cop to please show him where it said that the front fog light was forbidden to be used in the rain. They argued for a while until the cop’s superior noticed.
After hearing what was going on, the superior ripped the cop a new one and let [Instructor] and the student go.