Discussions with police e.g. at half an hour past midnight in one of our wine-growing regions in the +4 normally ended in long discussions about how old the car is and how it drives, how it compares to new cars etc., nothing else.
But last time the two policemen were really fit, they seemed to know quite a lot about vehicles registered as motorcycles and everything that seems mandatory. I was very surprised they had a noise-meter on board (what is the real name of these things?) and knew that the result of the measurement is very much dependent on the way the measurement is done (e.g. absorbing/reflecting walls in the vicinity).
Karl Life is hard in the mountains
2009 silver +4, 2013 red C4P, 2014 yellow M3W gone to a new owner
