How are Bi-Xenon Supposed to work?
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E200 CDI w211 and ML320 CDI w164
How are Bi-Xenon Supposed to work?
I have a 2003 E200 CDI with option code 614 (Bi-Xenon headlights). From my understanding, Bi-Xenon means the same bulb is used for both low and high beams, with the Xenon moving to adjust for the high beam. However, in my car, when I activate the high beams (or just flash them), the Xenon doesn’t move up like it does during the car’s startup sequence. Instead, only the H7 bulb in the smaller circle above the daytime running lights turns on, just like in a regular HID setup.
So, what’s the point of the Bi-Xenon if the Xenon doesn’t adjust for the high beams? Is this how it’s supposed to work, or is something wrong? Thanks!
P.S I also hear a noise from the headlights when I "flash" is this normal?
So, what’s the point of the Bi-Xenon if the Xenon doesn’t adjust for the high beams? Is this how it’s supposed to work, or is something wrong? Thanks!
P.S I also hear a noise from the headlights when I "flash" is this normal?
Last edited by kristiyan; Jan 26, 2025 at 01:51 PM.
Out Of Control!!
Joined: Nov 2018
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From: San Francisco Bay Area
2019 C63CS
As said there's a cutoff shield that covers part of the lens and it moves out of the way when the high beams are activated. The lens itself doesn't move. The lens only moves to level the beam. However, flashing is usually done with a separate halogen bulb to differentiate it from the high beams and to not be blindingly bright for the person you are flashing at.
Last edited by superswiss; Jan 26, 2025 at 05:25 PM.
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Joined: Jul 2021
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2006 E280
From my understanding, Bi-Xenon means the same bulb is used for both low and high beams, with the Xenon moving to adjust for the high beam. However, in my car, when I activate the high beams (or just flash them), the Xenon doesn’t move up like it does during the car’s startup sequence. Instead, only the H7 bulb in the smaller circle above the daytime running lights turns on, just like in a regular HID setup.
So, what’s the point of the Bi-Xenon if the Xenon doesn’t adjust for the high beams? Is this how it’s supposed to work, or is something wrong? Thanks!
So, what’s the point of the Bi-Xenon if the Xenon doesn’t adjust for the high beams? Is this how it’s supposed to work, or is something wrong? Thanks!
Thread Starter
Junior Member
Joined: Dec 2024
Posts: 29
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E200 CDI w211 and ML320 CDI w164
thank you all for the help, i covered the halogens and yeah the xenon gets brighter and is higher, here is a video WITH halogens that got me worried the xenons not working first is flash then pushing away the lever, i suppose the halogen is just orange and confuses me to not see the xenon - video also no error codes in das whatsoever, i. think it's just in my mind, does it look fine to you?
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Joined: Feb 2014
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From: MA
2008 E350 4Matic, 2011 E350 4matic
thank you all for the help, i covered the halogens and yeah the xenon gets brighter and is higher, here is a video WITH halogens that got me worried the xenons not working first is flash then pushing away the lever, i suppose the halogen is just orange and confuses me to not see the xenon - video also no error codes in das whatsoever, i. think it's just in my mind, does it look fine to you?
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From: 714/949, SoCal
2008 S211 4MATIC
i checked my build sheet and it does say 615 - bi-xenon with active curve - so maybe i just missed the low/high difference as my halogens overtook the overall high beam pattern. i think i need to block the halogen high beams and try again!
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