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

08 C350 Running Light Issue - Help Please

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old May 29, 2016 | 09:58 AM
  #1  
SG 08's Avatar
Thread Starter
Junior Member
 
Joined: Mar 2013
Posts: 22
Likes: 0
From: NC & MI
2008 SG C350
08 C350 Running Light Issue - Help Please

I have an issue with my running lights, sorry kind of long but want to clearly outline my issue as I need help. I had one of the DS eye brow bulbs go out a couple months ago so I figured I would take the opportunity to change them all out for LED's to match my headlights. PS went fine - unplug, change, check, reinstall. I started on the DS and I changed the eye brow bulb that was working, no issue. Changed the next one that was out and nothing, no light. I changed the side marker light that was working and it is now out. I found the fuse layout online and given the descriptions are not very good I checked every fuse under the hood and in the trunk to ensure there were no issues. Broke out my test light and it seems to be a power issue to both sockets, ground seems fine. I pulled all of the relays out to check for corrosion but they all looked good. After I did that I flipped the light switch and now both eye brow lights are working and the side marker light with the old bulb. Swapped the old marker light out for the LED bulb and it is out again... I pulled the DS inner fender and headlight to see if I could see a wire issue but everything is well wrapped and I don't see any issues. My next focus is on the relays but I cannot find a layout or description of them any where. If someone has another idea or has the relay descriptions please let me know.

Thank you for your help!

Chris
Reply
Old May 29, 2016 | 10:06 AM
  #2  
LILBENZ230's Avatar
MBWorld Fanatic!
 
Joined: Jul 2008
Posts: 8,384
Likes: 800
2019 G70 6MT & 2022 Ford Maverick XL
Are you sure the car isn't just cutting power to those sockets thinking the bulbs are out since you're sticking in LEDs?
Reply
Old May 29, 2016 | 10:35 AM
  #3  
SG 08's Avatar
Thread Starter
Junior Member
 
Joined: Mar 2013
Posts: 22
Likes: 0
From: NC & MI
2008 SG C350
I am not sure, there are no dash messages. How would I reset or address this? I have the physical bulbs in the sockets. I also checked the LED bulb on my multimeter and the circuit seems to be fine.

I have been a Ford and GM guy so working on my wife's car is somewhat new to me.
Reply
Old May 29, 2016 | 10:45 AM
  #4  
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
Have to reset the SAM by power cycling the vehicle. Lights off, turn engine on, then off, then turn lights back on.
Reply
Old May 29, 2016 | 12:38 PM
  #5  
SG 08's Avatar
Thread Starter
Junior Member
 
Joined: Mar 2013
Posts: 22
Likes: 0
From: NC & MI
2008 SG C350
Followed your process and (3) LED bulbs later everything is working!

Thank you very much!
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 09:09 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