Having done the Circuit Days drive to Monaco before the GTR, I was warned about Europe and the use of the GPS Radar/Laser scanners, however I used it no problem maybe because I wasn't going too stupid with so many cars around. Usually we encountered on the spot fines, however in Switzerland Ferrari driver was taken to Police Stn and then summoned to returned to court for I believe 2,000 Euros fine. Apart from that yes, Hi Vis, Triangle Breakdown and will check if extinguisher inside car was required. I had the C63 AMG sport exhaust, noise and emission was not a problem, it seems you are more likely to encounter issues if you reside with vehicle. Just make sure you have ALL necessary documents for you and your vehicle.