Warning triangle and first aid kit
In France, Italy, Croatia, Austria, Slovenia, Spain and Switzerland you must carry a warning triangle. In case of a problem with the car, when the car becomes an obstacle or danger to approaching cars, other road users have to be given warning. Place the warning triangle in a very visible spot on the road at a distance of 30 meters from your car.
First aid kit
In more and more countries a first aid kit is required but of course it is always wise to have one in your car. Make sure it is has everything you might need.