E-Class (W211) 2003-2009

Dumb bi-xenon headlight question. When the low beams (m)

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Old 06-12-2005, 09:39 PM
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2004 E500
Dumb bi-xenon headlight question. When the low beams (m)

are on, all that is engaged are the xenons. When the hi beams are engaged, however, the inner lights, which appear to be halogen and used for "Flash to pass" also turn on. Why? One would think that with bi-xenons such wouldn't be needed. Any ideas?
thanks-

Jim
Old 06-13-2005, 03:53 AM
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Our cars bi Xeons are not what most people think it is, it still use the inner headlights for high beam - using halogen bulbs.
Old 06-13-2005, 10:54 AM
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BiXenon only means that there is a diaphragm in your headlight, and when you turn on the hi beams, the diaphragm switches into a different configuration, thereby projecting more of the HID lights to the upper portion of the light pattern. The halogens are considered as AUXILLARY hi beams. It is explained clearly in your owner's manual.
Old 06-13-2005, 01:13 PM
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I never fully understood that, thanks for the clarification. In the BMW's, the "diaphragm" provides the full high beam therefore no need for any "auxillary" halogens.
Old 06-13-2005, 07:38 PM
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Interesting. After 4 BMWs I was used to a

Originally Posted by Samoan_Ridah
I never fully understood that, thanks for the clarification. In the BMW's, the "diaphragm" provides the full high beam therefore no need for any "auxillary" halogens.
different concept of bi-xenons. With BMW, the halogens were only used for flash to pass.
Old 06-13-2005, 07:47 PM
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The only reason for the inner halogen lights is for flashing to pass when the low beams aren't on. You will still hear the solenoids moving when you flash the high beams when the low beams are off.

The reason for that is xenons aren't instant on and off like halogens can be.
Old 06-13-2005, 08:51 PM
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Um, where exactly in the rather voluminous

Originally Posted by Kev04C320
BiXenon only means that there is a diaphragm in your headlight, and when you turn on the hi beams, the diaphragm switches into a different configuration, thereby projecting more of the HID lights to the upper portion of the light pattern. The halogens are considered as AUXILLARY hi beams. It is explained clearly in your owner's manual.
manual did you find this? I'm still stuck at Vol XI, chapter 23 of the manual....
Old 06-13-2005, 09:06 PM
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Point is, MB Xenon/halogen headlights on the E are just about the best factory lighting you get on any car. Enjoy it.
Old 06-13-2005, 09:10 PM
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Build date 2-04 E500
Originally Posted by HotWheels500
Point is, MB Xenon/halogen headlights on the E are just about the best factory lighting you get on any car. Enjoy it.
And add the active feature, then they are the best by far....
Old 06-13-2005, 09:55 PM
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Originally Posted by HELL ONA HARLEY
And add the active feature, then they are the best by far....
Couldn't agree more. The actives really work. Amazing!

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