I have traveled in France many times in the last 12yrs in my 4 litre S Type,I bought a pair of official Jag part beam deflectors,cant remember how much they were now,probably not cheap,they comprised two full lense plastic covers that clipped over the dipped beams each had a very small black oblong printed on them to supposedly correct the beam, I have never really believed that they can possibly work and I do get a lot of flashing at me when travelling at night so I think they probably don't work very well, I try to keep my night driving to a minimum, I have considered buying a pair of eu spec main beams and installing them for my trips abroad but have never looked in to the cost ,probably considerable I would think, and have also wondered myself if there was adjustment to do this as after all it is a single headlight dipped beam that you would think was merely tilted in the right direction get the right effect .....good luck ....John