C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

Headlight LED conversion

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Mar 29, 2018 | 08:02 PM
  #1  
Rusty G's Avatar
Thread Starter
Newbie
 
Joined: Mar 2018
Posts: 3
Likes: 0
C300M
Headlight LED conversion

Is it wise to convert to an LED headlight bulb from the standard H7? Thanks.
Reply
Old Mar 30, 2018 | 12:24 AM
  #2  
JohnnyC's Avatar
MBWorld Fanatic!
10 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: Sep 2014
Posts: 1,051
Likes: 217
From: LaLaLand
2015 GLK350 & 2020 C300
nope
Reply
Old Mar 30, 2018 | 01:41 AM
  #3  
AZN Optics's Avatar
SPONSOR/MBworld Guru
 
Joined: Jul 2010
Posts: 6,936
Likes: 215
From: California
MB W204/W212, BMW E66, Porsche 958, VW MK6 TDI, Maserati Ghibli SQ4
You're better off with an HID conversion kit
Reply
Old Mar 30, 2018 | 08:12 AM
  #4  
gamma300C's Avatar
Super Member
5 Year Member
Liked
 
Joined: Jun 2017
Posts: 608
Likes: 107
From: Western NC
2009 MB C300 Sport 4matic
Been there, done that.. LED's .look bright but they don't throw the light far (Google Search and you will see this is the consensus) and only sorta work in the projector low beam. Even the LED backup lights I got for my Jeep were a disappointment .My '09 Halogen C300 headlights were pretty weak but improved considerably with a set of the Vosla bulbs in all 4 ( see link). Short of a Xenon upgrade this worked the best for me. The HID's work pretty well in the projector low beam also but are a hot mess in the high's. You have to mount the ballasts and mess with the cover caps and make sure you get the resistor add ons to prevent Error , Light Out messages. My Op7 HID kit was forever blowing HID bulbs also. Overall i personally was happy with the upgraded halogen bulbs, inexpensive, ease of install, and good lumens.



https://store.candlepower.com/h7headlamps.html
Reply
Old Mar 31, 2018 | 03:40 PM
  #5  
Shimee's Avatar
Senior Member
10 Year Member
Photogenic
Photoriffic
 
Joined: Apr 2014
Posts: 321
Likes: 34
From: Massachusetts
2010 C350 Sport
Originally Posted by gamma300C
Been there, done that.. LED's .look bright but they don't throw the light far
To elaborate, this is the difference between lumen and lux: lumen is the measure of total light output per second from a source; lux is equal to one lumen measured per square meter. Usually LED bulbs generate huge amounts of lumen but are not able to maintain the lux output further away from the light source. The lux rating of an LED bulb will be huge close to the bulb, but further away it will drop off significantly. Meaning an LED bulb needs huge amounts of total lumen output to match the total lux measured compared to an equivalent incandescent bulb. This is why LED bulbs appear bright but are not actually bright. This is also why the lumen rating is worthless compared to a lux rating, if the product you're looking at even has a lux rating.

Basically lumen is how much light a bulb is capable of producing while lux is how bright the bulb is actually.

With that said, there have been significant improvements with LED bulbs over the years. Early on the diodes used in LED bulbs were incompatible with incandescent reflector housings because they were not designed for LED light sources. The diodes were not able to focus light the same way that a filament was capable of doing. The headlight would appear bright but would be useless down the road. Now LED bulbs use diodes which focus the light in a much tighter tolerance, mimicking an incandescent filament much better than they used to be able. They're still not a direct replacement but are very close. This all depends on what you buy. Cheap alternatives from eBay will not be designed well, have crooked diodes, and even use no-name or knock-off diodes. Name brand options from brands like OSRAM or Philips are designed to be as closely compatible with incandescent reflector housings as possible since, well, they have the resources.

Despite improvements to LED bulbs or options from reputable brands, they are still not a good choice to use in projectors because projectors harness the light produced by a bulb differently. In a projector all of the light produced by a bulb is utilized whereas in a reflector typically only the sides of the bulb are utilized. Since LED bulbs are two sided, they perform poorly in a projector but fairly well in a reflector.
Reply

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 07:57 AM.

story-0
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know

Slideshow: Mercedes-AMG's new electric GT 4-Door Coupe trades combustion for software, synthetic noise, and more than 1,100 horsepower.

By Verdad Gallardo | 2026-05-20 20:08:15


VIEW MORE
story-1
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-2
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-3
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-4
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-5
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-6
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-7
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-8
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-9
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE