Issue with Xenon Headlights Brightness
Thread Starter
Junior Member
Joined: Dec 2018
Posts: 69
Likes: 8
From: Texas, USA
M-Class (W164) 2007: ML350 4Matic Gas
Issue with Xenon Headlights Brightness
Hello,
I noticed recently that the brightness of my xenon headlights is very low. It is even lower than the brightness of halogen headlights (compared with another W164 with halogens).
To tackle this issue, I replaced the HID bulbs (Philips D2SC1 Xenon HID Headlight Bulb)[size=5px], [/size]but I didn't see a significant difference in brightness. Also, I cleaned the lenses, and again no difference in the brightness.
Other than that, there are no issues/errors reported on my OBD scanner. The only issue I can report is that the wire harness of the headlights is not in great condition (the plastic isolation is kind of pealing and I had to re-insulate it).
Any ideas on what else I should check or what else could be the issue?
Thanks!
I noticed recently that the brightness of my xenon headlights is very low. It is even lower than the brightness of halogen headlights (compared with another W164 with halogens).
To tackle this issue, I replaced the HID bulbs (Philips D2SC1 Xenon HID Headlight Bulb)[size=5px], [/size]but I didn't see a significant difference in brightness. Also, I cleaned the lenses, and again no difference in the brightness.
Other than that, there are no issues/errors reported on my OBD scanner. The only issue I can report is that the wire harness of the headlights is not in great condition (the plastic isolation is kind of pealing and I had to re-insulate it).
Any ideas on what else I should check or what else could be the issue?
Thanks!
Super Member
Joined: Jan 2007
Posts: 622
Likes: 202
From: CA
11 ML550, 95 Supra TT, 14 Audi S4
Hello,
I noticed recently that the brightness of my xenon headlights is very low. It is even lower than the brightness of halogen headlights (compared with another W164 with halogens).
To tackle this issue, I replaced the HID bulbs (Philips D2SC1 Xenon HID Headlight Bulb)[size=5px], [/size]but I didn't see a significant difference in brightness. Also, I cleaned the lenses, and again no difference in the brightness.
Other than that, there are no issues/errors reported on my OBD scanner. The only issue I can report is that the wire harness of the headlights is not in great condition (the plastic isolation is kind of pealing and I had to re-insulate it).
Any ideas on what else I should check or what else could be the issue?
Thanks!
I noticed recently that the brightness of my xenon headlights is very low. It is even lower than the brightness of halogen headlights (compared with another W164 with halogens).
To tackle this issue, I replaced the HID bulbs (Philips D2SC1 Xenon HID Headlight Bulb)[size=5px], [/size]but I didn't see a significant difference in brightness. Also, I cleaned the lenses, and again no difference in the brightness.
Other than that, there are no issues/errors reported on my OBD scanner. The only issue I can report is that the wire harness of the headlights is not in great condition (the plastic isolation is kind of pealing and I had to re-insulate it).
Any ideas on what else I should check or what else could be the issue?
Thanks!
Thread Starter
Junior Member
Joined: Dec 2018
Posts: 69
Likes: 8
From: Texas, USA
M-Class (W164) 2007: ML350 4Matic Gas
Your projector bowls have probably gotten dull with age. It is pretty common on 164 GL/MLs. The ones on my ML were ok, and the ones on my GL were terrible. You can see my stock ML projector compared to a new aftermarket projector in the second picture: https://mbworld.org/forums/m-class-w...-retrofit.html The only fix is the replace the projectors unfortunately but it is a pretty easy job as projector retrofits go.
Super Member
Joined: Jan 2007
Posts: 622
Likes: 202
From: CA
11 ML550, 95 Supra TT, 14 Audi S4
Thread Starter
Junior Member
Joined: Dec 2018
Posts: 69
Likes: 8
From: Texas, USA
M-Class (W164) 2007: ML350 4Matic Gas
Super Member
Joined: Nov 2017
Posts: 558
Likes: 114
From: San Francisco Bay Area
2006 R500
Here is my guide on replacing with the Morimoto D2S 5.0 projectors: https://mbworld.org/forums/r-class-w...-retrofit.html
Yes, it is W251 but the internals are the same.
Yes, it is W251 but the internals are the same.
Thread Starter
Junior Member
Joined: Dec 2018
Posts: 69
Likes: 8
From: Texas, USA
M-Class (W164) 2007: ML350 4Matic Gas
Here is my guide on replacing with the Morimoto D2S 5.0 projectors: https://mbworld.org/forums/r-class-w...-retrofit.html
Yes, it is W251 but the internals are the same.
Yes, it is W251 but the internals are the same.
Trending Topics
Super Member
Joined: Jan 2007
Posts: 622
Likes: 202
From: CA
11 ML550, 95 Supra TT, 14 Audi S4
MB World Stories
The Best of Mercedes & AMG
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
