Thanks for the reply. I hoped that is a less intrusive way than tempering with the adjusting potentiometer. Like some manual adjustment on the optical head lamp.
I observed that the filter in front of the xenon lamp its not clear/white like it was and got a little brownish/yellow. Is there a way cu clean that glass(plastic) filter in front of xenon bulb?
Also the colour it's not the same on left and right xenon headlight. One of them is more yellow, the other bluer.
PS:the left headlamp has one of the two parking lights burnt. I don't think this should influence the xenon colour, even if short or some resistor appear on the electric wiring.