In Belgium every car is required to carry at least one fire extinguisher. In Germany you need to have an environment sticker to drive into a city. In France you might need alcohol testers. Coming from mainland Europe to the UK you are required to apply lamp stickers. You need to have fluo vests in some countries. Sometime only the driver, some times all passengers. Today I learned that in Spain you are required to carry spare glasses. If you are wearing sun glasses, while driving you also need to have spare sun glasses. I could ofcourse ask a question on each country which I intend to visit, but can I make my car fully EU compliant. Meaning I have everything required in if it is required in at least one EU member state.
What inventory should I have in my car? What tests, governmental stickers, or other regulation should I adhere too?