I have a 2016 model C200 Sport Premium saloon. It is fitted with LED high performance headlights. Will these comply with EU (particularly French) dipped beam requirements without modification? If not, can anyone advise on the modifications that are required for compliance?

 

According to the manual you don't need to take any actions to be allowed to drive in a country where you drive on the opposite side of the road.
The car should fit the legal requirements.
If your car has the Intelligent Led Lighting system, you can make the dim lights symmetrical with a function in the Settings menu if you want. Some features like Highway and Fog lights are disabled when you activate this setting.