GLS Class (X167) Produced 2020 to present

2020 GLS450 headlight led strip inop.

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Old May 31, 2025 | 10:44 AM
  #26  
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Originally Posted by UltraSpeed
Coding Mercedes vehicles with these tools is just an illusion, but you'll find out sooner or later. I've tested them all, from yours to Autel and they all messed up at one point
You've tested?
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Old Jun 1, 2025 | 11:25 AM
  #27  
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Well I still haven't had time to tear off the front bumper. Work and life keeping me busy. Mostly work pissing me off recently. Got a free riding mower I had to tune up. Lol hopefully this Monday or Tuesday will get it done.
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Old Jun 1, 2025 | 11:49 AM
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Originally Posted by Savannah_GLS450
Well I still haven't had time to tear off the front bumper. Work and life keeping me busy. Mostly work pissing me off recently. Got a free riding mower I had to tune up. Lol hopefully this Monday or Tuesday will get it done.
All the best OP.
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Old Jun 8, 2025 | 08:32 PM
  #29  
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Funny, my wife's GLS 550 just started doing the same. Also read with my scanner tools and no code either. Hope you find the issue!!!
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Old Jun 18, 2025 | 09:29 AM
  #30  
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Hopefully this Saturday I can work on it
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Old Jun 23, 2025 | 11:25 AM
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I got the headlight unit out and I find there's two modules One was on the bottom I didn't know about so I don't know which one controls the daytime running lights. And to make matters worse the replacement module I got didn't fit either of them.
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Old Jun 23, 2025 | 11:26 AM
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These are the two modules on the headlight assembly
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Old Jul 14, 2025 | 12:47 PM
  #33  
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Originally Posted by trigital
You've tested?
I had to buy the VD70 scanner, it codes
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Old Jul 14, 2025 | 12:49 PM
  #34  
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Well I replaced the Pixel 2 module today and coded it and it did not fix my problem the daytime running light still glows a dim amber when it should be white. Ugh. Now what to do?
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Old Jul 14, 2025 | 01:09 PM
  #35  
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So you can wiggle the headlight to the side by just undoing the bumper on the driver side. And of course taking the fender liner out.
So you can wiggle the headlight to the side by just undoing the bumper on the driver side. And of course taking the fender liner out.
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Old Jul 15, 2025 | 10:18 AM
  #36  
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I have a new module for the DLR en route. I dont have the time to switch the left and right modules at this time, (which would be a good trick to try) fingers crossed its not the led strip itsself.
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Old Jul 20, 2025 | 05:49 PM
  #37  
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Well both modules have been replaced and I still have the dim amber glow from my daytime running light. I guess this is a sign the headlight housing is bad. Any opinions?



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Old Jul 22, 2025 | 08:53 AM
  #38  
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It's most likely this, the PCB in the lamp assembly and not the modules.
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Old Jul 22, 2025 | 02:24 PM
  #39  
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How does one get this chip? I have to get a used headlight assembly? Is it something that easily plugs in?
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Old Jul 22, 2025 | 04:09 PM
  #40  
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Originally Posted by Savannah_GLS450
How does one get this chip? I have to get a used headlight assembly? Is it something that easily plugs in?
You’re gonna need a whole headlight assembly. You can get them off ebay fairly inexpensively.
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Old Aug 3, 2025 | 03:46 PM
  #41  
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I found a company in China that makes these. I ordered one and it should be here this week.




Originally Posted by mike75

13;9191491

It's most likely this, the PCB in the lamp assembly and not the modules.
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Old Aug 3, 2025 | 04:22 PM
  #42  
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I hope you are as handy as you are brave and resourceful LOL.

The thought of opening the lamp was just too overwhelming for me to attempt based on what I already knew about the damage the smallest amount of moisture inside these lamps will cause. For me, the safest play was to just get a used lamp assembly given the fact that if by chance it wasn't the PCB, the front end would need to come off a third time. I wasn't willing to take that risk given how fed up I was already. So, I just ate the expense rather than trying to open it up and replace it myself.

I wish you all the best though and hope this gets you fixed up! I'm also sorry this happened to you. This issue has really been my only negative experience with the car but it was a really big issue so, I know how frustrated you must be by now.
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Old Oct 5, 2025 | 12:29 PM
  #43  
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Originally Posted by mike7513
I hope you are as handy as you are brave and resourceful LOL.

The thought of opening the lamp was just too overwhelming for me to attempt based on what I already knew about the damage the smallest amount of moisture inside these lamps will cause. For me, the safest play was to just get a used lamp assembly given the fact that if by chance it wasn't the PCB, the front end would need to come off a third time. I wasn't willing to take that risk given how fed up I was already. So, I just ate the expense rather than trying to open it up and replace it myself.

I wish you all the best though and hope this gets you fixed up! I'm also sorry this happened to you. This issue has really been my only negative experience with the car but it was a really big issue so, I know how frustrated you must be by now.
---

Well trying to get the lens off by baking the housing is a waste of time. I had it in at 270* for 20 minutes and it didnt budge the sealant. IMO these headlamps are completly un-servicable. With all the tech in these things its a ticking time bomb. I really dont appreciate the $1700+tax for the headlight alone and I am guessing one in 10 vehicles will need at least one replaced. Miine needs both!
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Old Oct 5, 2025 | 12:33 PM
  #44  
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Well I got a used headlamp on ebay, installed it, and there was faulty led in it. )one in front) so time for round 2, got a second one and all its leds work! but there is a light stain on the inside of the lens and the cooling fan is very noisy. (possibly a sign of it dying). But I guess I will keep it. I might do a bulk order for new housings, if my assumptions are correct and many, MANY people will need to replace a unit. I could probably make a lot of money.
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