SL/R230: R230 headlights
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Newbie
Joined: Aug 2017
Posts: 11
Likes: 1
08 sl55 amg
R230 headlights
Does anyone know where I can get a replacement harness for inside the Bi- xenon headlights, the wire insulators are cracking and disintegrating and I don't want to buy a whole new headlight with igniters and ballasts for just a bad harness
Super Member
Joined: Feb 2007
Posts: 809
Likes: 74
From: Dallas, TX
2008 E63 wagon (1 of 62)
heat cycling is the biggest cause combined with probably cheap wiring/insulation.. Mercedes used to have engine harness insulation issues pre-1995 or so, but they changed the processes since then and they no longer have those issues. The insulation on the wiring in the headlamps probably isn't as durable when compared to the newer engine wiring harnesses.
Also, if you dont think your headlamps get hot, turn on your lights (xenon/halogen) and hold your hand infront of the car on the lens and you will feel it get warm pretty quickly.
Also, if you dont think your headlamps get hot, turn on your lights (xenon/halogen) and hold your hand infront of the car on the lens and you will feel it get warm pretty quickly.
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MBWorld Fanatic!
Joined: Mar 2018
Posts: 1,442
Likes: 260
From: Netherlands
2005 R 230 SL350 (M112 3.7). Sold the 1966 W113 230SL recently
My headlights are crystal clear, like new. Should I do something about keeping them as clear in the (long)er run? I use anti freeze that explicitly states it is safe for plastic head lights. How about applying car wax?
(bi-xenons - can wax cause an irritating flare for head on traffic?)
(bi-xenons - can wax cause an irritating flare for head on traffic?)
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Senior Member
Joined: Aug 2010
Posts: 359
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From: Rockport, TX
2007 S65 AMG-Sold, 2007 SL55 P030 - 2016 GL450 - - 2017 AMG GTS - Sold - 2015 AMG S65
Senior Member
Joined: Jan 2015
Posts: 390
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From: Seattle, WA
SL500 & GL450
This ceramic coating works great. https://www.mckees37.com/headlight-coating.html#
MBworld Guru
Joined: Dec 2009
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NO LONGER ACTIVE
Not sure about pre-cut , bu you can buy sheets of 3M clear-bra. Just so it on a nice, hot day. Let the clear bra and the car sit out in the sun for about 30 minutes, start at the center and stretch to the edges.
Senior Member
Joined: Nov 2016
Posts: 271
Likes: 23
From: Kirkland, WA
2003 SL500
I understand that headlights are actually covered with clear coat. This guy shows how to restore the clear coat on the headlight. Look though videos on his channel for one with headlights.
https://www.youtube.com/channel/UCT5...uy041dbWPB6skg
https://www.youtube.com/channel/UCT5...uy041dbWPB6skg
Newbie
Joined: Sep 2024
Posts: 2
Likes: 1
Were you able to solve the problem with a replacement harness? If yes, do you have a contact?
Thanks a lot, chris
Super Member
Joined: Sep 2021
Posts: 541
Likes: 117
From: Ann Arbor, MI
2004 SL600
There are two "Mercedes R230 headlight harness" on Ebay right now, although they say they are for 2003-2006; don't know if it would fit a 2007.
I changed the search to "2007 mercedes r230 headlight harness" and got very different results, including pigtails that might do what you need.
I changed the search to "2007 mercedes r230 headlight harness" and got very different results, including pigtails that might do what you need.
Last edited by mrvedit; Jan 24, 2026 at 08:59 PM.
