My 2010 RS250 drivers side headlight unit has fogged up and now the xenon bulb is not working (sidelight is). I was under the impression that xenon bulbs last a lifetime? What could be the issue? If the bulb needs replacing where is best to look on the high street as need one tomorrow as I'm doing some long journeys this weekend. From having a quick look online it appears a D1S bulb is the way to go but not sure what colour temp it would be??
They can change colour/intensity over time, so best to replace both if you want them to look the same.
