> I've seen many Mercedes's and BMWs that have Xenons that went out. The gas > will > wear out in the end, but the lifespan is much longer than for Halogen bulbs. > You can read a lot about Xenon here: http://www.hella.de/shop/xenon/indexe.htm It's not the Gas it's the ballast and the electrodes in the envelope. Eric Fletcher '00 S4tt