As an amusing addition to the comment DW made about legislation falling behind technology, as many will know in France drivers are required to carry a spare set of bulbs. The 2 Mercedes C Class we have have all has LED bulbs, there isn't a single filament or halogen bulb anywhere. Models sold in other European markets have traditional bulbs: my dealer advised me to carry a set of bulbs for the C Class from one of the markets that doesn't have all LEDS, just to keep the Policeman/woman happy.
I was faced with a similar problem last year. My car has led headlights that are sealed units, Not practical carrying a spare so just took a standard bulb and crossed my fingers.
