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M-Class (W166) Produced 2012-2015

is high beam adjustable in w166

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Old Mar 22, 2018 | 10:32 AM
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is high beam adjustable in w166
I recently changed high beam bulbs to Philips Crystalvision ultra to achieve a bit whiter color compared to stock H7s.
After installation i noticed than my passenger side high beam is not properly aimed, it projects lower than my low beams like a search light spot about 30 feet in front of the car..
I thought i did not install it properly, or did not lock the clip correctly. Long story short, after fighting with it for hours, i could not change the aim.
I reinstalled the original bulb, i used a small endoscopic camera to look inside of the headlight to ensure that clip is locked properly,
Nothing works, it works as a spot light, not as a headlight....
I do not want to re-aim the entire headlight because low beam is fine, is there a way to aim the high beam separably form the low beam?
What could i possibly be doing wrong? Am i missing anything?
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Old Mar 22, 2018 | 01:36 PM
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If there is no high beam adjustment (and I'd be shocked if there is), I'd return the bulb for a replacement. Unless you always had this issue but never really noticed it, I can't see the problem being with anything but the housing.
Driver's side is ok, why?
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Old Mar 22, 2018 | 04:09 PM
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The driver side is fine, but returning back the original bulb does not help either. That puzzle me thinking that i shifted the lense or bent the retaining clip, this is why i am questioning if its ajustable and HOW.
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Old Mar 22, 2018 | 05:05 PM
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Gotcha!!!

Post back with the cure
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Old Mar 24, 2018 | 10:09 PM
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The passenger side is intentionally pointed that way so drivers have a better night time view of the curb or side of the road.
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Old Mar 27, 2018 | 08:55 AM
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Originally Posted by Rainers
The passenger side is intentionally pointed that way so drivers have a better night time view of the curb or side of the road.
Like i stated before, the passenger side was aimed differently before i switched the bulb. Now both bulbs reflect the same way illuminating a small patch in front of the bumper, i am positive it needs adjustment. the question is can the high beam reflector be adjusted independently from the low beam lens? if yes, then HOW?
Last edited by genanyc; Mar 27, 2018 at 09:00 AM.
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Old Mar 27, 2018 | 10:31 AM
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I don't believe there is a mechanism available to adjust high beam lens independently.
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Old Mar 27, 2018 | 04:19 PM
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Just thinking 'stupidly' here... Might there have been an Oring seal(or part of one) that is still in the housing, and somehow 'angling' the bulb?
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Old Mar 27, 2018 | 04:30 PM
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If it was my car, I'd remove the entire light housing, remove all the bulbs and check inside the housing with a good flash light.
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Old May 3, 2018 | 08:57 PM
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Originally Posted by genanyc
The driver side is fine, but returning back the original bulb does not help either. That puzzle me thinking that i shifted the lense or bent the retaining clip, this is why i am questioning if its ajustable and HOW.
Hi, can you do me a huge favor and post a video of how to change the high beams for the w166?Looked online for videos but couldn’t find any on the w166.
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Old May 3, 2018 | 11:26 PM
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Originally Posted by genanyc
I do not want to re-aim the entire headlight because low beam is fine, is there a way to aim the high beam separably form the low beam?
Adjustment for high beam is here. .
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Old May 4, 2018 | 04:47 AM
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Originally Posted by jrsmith_68
Adjustment for high beam is here. .
Sunuva......

Poor genanyc. So there is an adjustment for the high beams. Thx for posting jrsmith
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