DRL turned yellow
MBWorld God!
Joined: Dec 2019
Posts: 32,217
Likes: 6,275
MBWorld God!
Joined: Dec 2019
Posts: 32,217
Likes: 6,275
Here is where the module is located, though that thread is a sedan, it might still be in the same location : https://mbworld.org/forums/c-class-w...light-mod.html
Out Of Control!!
Joined: Nov 2018
Posts: 11,397
Likes: 5,322
From: San Francisco Bay Area
2019 C63CS
Unfortunately you'll have to replace the headlight. White LEDs turning yellow happens when the phosphor coating degrades and changes color. It's non-reversable. It happens naturally or due to too much heat exposure. UV radiation can also cause it. White LEDs naturally start to turn yellow over time due to natural degradation, but this is a major degradation that you have. Your headlight might be faulty and things got too hot causing the phosphor coating to rapidly degrade.
Last edited by superswiss; Apr 12, 2025 at 03:19 PM.
MBWorld God!
Joined: Dec 2019
Posts: 32,217
Likes: 6,275
Unfortunately you'll have to replace the headlight. White LEDs turning yellow happens when the phosphor coating degrades and changes color. It's non-reversable. It happens naturally or due to too much heat exposure. UV radiation can also cause it. White LEDs naturally start to turn yellow over time due to natural degradation, but this is a major degradation that you have. Your headlight might be faulty and things got too hot causing the phosphor coating to rapidly degrade.
