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Discussion Starter · #1 ·
Just dropping this here since if I recall, our models used the same bi-xenon system.
Forgive my ignorance. This is my first vehicle with Xenon lights. I received a "headlight malfunction" message on the info display around dusk last night.
Indeed, one of the bi-xenon's was out. In my mind I was ready to order two new bulbs for $100 but when I got back in the drivers seat, I accidentally brushed the flash to pass stalk. To my surprise the headlight that was out, turned on(?). When I put the stalk in highbeam it also lit and stayed on.

My understanding of the bi-xenon system is that the highbeams are actually always on. In non-highbeam mode, there's a shutter behind the lens that cuts part of the beam. When the high-beams are activated, an actuator opens the shutter and lets all output through the lens.

Am I wrong? What do you think the problem may be? Something funky with the ballast? I'll add that I noticed condensation built up inside the headlight housing.
I guess I have a crack or bad seal, and that invariable means unless I can find the penetration point and seal it, I'll be on the hook for a new headlight -- and of course it's an adaptive which means $$$$ :mad:
 

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They also have actual high beam bulbs that are separate. That's just a Halogen bulb turning on.
 

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Yes the bi-xenon uses the same bulb for low and high beam then a mechanism redirects the light beam. Might just been a slow ballast activation.
 

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Discussion Starter · #4 · (Edited)
Ignore this thread. The message read bulb failure low beam. The maintenance required message was regarding my ABL failure
After further review, the passenger side high beam is dead too. Appears the reflection off an angled white wall hit at just the right location to make it seem like both lights were on.

I’m guessing the condensation killed it because it can’t be coincidence.
 
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