2014 GL350 DRL Flickering Need Help!!
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Joined: Jul 2025
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GL350 and GLK 250
2014 GL350 DRL Flickering Need Help!!
Hi everyone, thankyou for your input on my Flickering DRLs
How I think they are suppose to work, Switch in Auto, Super Bright in the Daytime, when Headlights and Park Lights come on at night, they dim to a lower intensity
What mine do, Switch in Auto, flicker and pulse erratically like a police car, looks super cool, but not cool... haha
When head lights and park lights come on at night, everything looks as it should, with DRLs at lower intensity
I have removed the Light from the bumper, i get the Check DRL Code on dash, that goes away once installed again after cycling ignition
i can hook the light directly to the battery and it is super bright with no flickering,
i have pierced the wires to the light when connected in its natural habitat, when i connect my meter its getting 13.5VDC with no interruptions but light still flickers
with light unplugged i have 0 Vdc at the connector, im assuming it has something to do with error on dash, when i plug it back in it stays out until i cycle the ignition, then back on and flickering again
I really dont know where to go from here…
Any help when you have time would be great!
How I think they are suppose to work, Switch in Auto, Super Bright in the Daytime, when Headlights and Park Lights come on at night, they dim to a lower intensity
What mine do, Switch in Auto, flicker and pulse erratically like a police car, looks super cool, but not cool... haha
When head lights and park lights come on at night, everything looks as it should, with DRLs at lower intensity
I have removed the Light from the bumper, i get the Check DRL Code on dash, that goes away once installed again after cycling ignition
i can hook the light directly to the battery and it is super bright with no flickering,
i have pierced the wires to the light when connected in its natural habitat, when i connect my meter its getting 13.5VDC with no interruptions but light still flickers
with light unplugged i have 0 Vdc at the connector, im assuming it has something to do with error on dash, when i plug it back in it stays out until i cycle the ignition, then back on and flickering again
I really dont know where to go from here…
Any help when you have time would be great!
Out Of Control!!
Joined: Apr 2019
Posts: 12,003
Likes: 6,827
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
What bulb type is it ?
How many miles ?
The (+) side of voltage is showing stable...
Where did you source your GND side for measure??
How many miles ?
The (+) side of voltage is showing stable...
Where did you source your GND side for measure??
Last edited by CaliBenzDriver; Jul 11, 2025 at 01:08 AM.
Thread Starter
Newbie
Joined: Jul 2025
Posts: 5
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GL350 and GLK 250
Hello, Its a stock LED Running light part
vehicle has 220,000km or 136,000mi
A2049065501
I pierced both wires going to the light to take my reading, so essentially my meter was in parallel with the lightvehicle has 220,000km or 136,000mi
Last edited by S Richards; Jul 11, 2025 at 09:06 PM.
Out Of Control!!
Joined: Apr 2019
Posts: 12,003
Likes: 6,827
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
Based on your inputs, the poor connection is inside the light itself then.
It's either gonna need a "5mn solder job" or a new/used replacement unit.
Can you open up this light fixture ???
Power supply voltage may be pulsed rather than a flat DC voltage.... in which case the ballast may be causing this as well.
Thread Starter
Newbie
Joined: Jul 2025
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GL350 and GLK 250
When light is connected directly to battery it works fine. And it only flickers on the high intensity daytime setting, so i dont think the problem is in the light
do you know where the ballast or driver is located for these?
do you know where the ballast or driver is located for these?
Out Of Control!!
Joined: Apr 2019
Posts: 12,003
Likes: 6,827
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
Last edited by CaliBenzDriver; Jul 12, 2025 at 04:43 PM.
Thread Starter
Newbie
Joined: Jul 2025
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GL350 and GLK 250
Hello, i have removed the Headlight Module located on the side of the headlight housing, it is not related to the DRL in the bumper
they continue to flicker with the module removed on both left and right sides
i have also called Mercedes Parts Dept and asked for a DRL module or controller, and they advised me that there isnt one for the gl35does anyone have the wiring diagram or schematic?
they continue to flicker with the module removed on both left and right sides
i have also called Mercedes Parts Dept and asked for a DRL module or controller, and they advised me that there isnt one for the gl35does anyone have the wiring diagram or schematic?
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