Headlight noise
Thread Starter
Junior Member
Joined: May 2021
Posts: 28
Likes: 20
From: Sweden
2011 G55 AMG
Headlight noise
Hello!
EDIT: It turned out to be the tweeter speaker inside the rear passenger door. Only this one speaker outputting the high pitch sound, and only while headlights are on.
I have a little gremlin in the G55 and thought I'd reach out to see if anyone has experienced something similar, or can provide a decent suggestion of where I should start...
To keep it short; whenever I turn on the headlights I get a high pitch whining noise from somewhere inside the car. Sound is consistent and is always present while headlights are on. It goes away the second your turn the lights off. Positioning lights or low/high beam make no difference. With DRL only (LED strip below headlights) there is no noise, so "fortunately" it's only bothering me while driving in the dark.
Due to some issues with my hearing I have a hard time locating the source of the sound, but I suspect it's coming somewhere from the passenger side, low down towards the floor.
Any suggestions on what could be the cause of this, or where I should start looking?
Thanks,
CrashworkZ
EDIT: It turned out to be the tweeter speaker inside the rear passenger door. Only this one speaker outputting the high pitch sound, and only while headlights are on.
I have a little gremlin in the G55 and thought I'd reach out to see if anyone has experienced something similar, or can provide a decent suggestion of where I should start...
To keep it short; whenever I turn on the headlights I get a high pitch whining noise from somewhere inside the car. Sound is consistent and is always present while headlights are on. It goes away the second your turn the lights off. Positioning lights or low/high beam make no difference. With DRL only (LED strip below headlights) there is no noise, so "fortunately" it's only bothering me while driving in the dark.
Due to some issues with my hearing I have a hard time locating the source of the sound, but I suspect it's coming somewhere from the passenger side, low down towards the floor.
Any suggestions on what could be the cause of this, or where I should start looking?
Thanks,
CrashworkZ
Last edited by crashworkz; Sep 29, 2021 at 07:21 AM.
MBWorld Fanatic!
Joined: Oct 2019
Posts: 5,161
Likes: 1,772
From: Colorado
G550
Hello!
I have a little gremlin in the G55 and thought I'd reach out to see if anyone has experienced something similar, or can provide a decent suggestion of where I should start...
To keep it short; whenever I turn on the headlights I get a high pitch whining noise from somewhere inside the car. Sound is consistent and is always present while headlights are on. It goes away the second your turn the lights off. Positioning lights or low/high beam make no difference. With DRL only (LED strip below headlights) there is no noise, so "fortunately" it's only bothering me while driving in the dark.
Due to some issues with my hearing I have a hard time locating the source of the sound, but I suspect it's coming somewhere from the passenger side, low down towards the floor.
Any suggestions on what could be the cause of this, or where I should start looking?
Thanks,
CrashworkZ
I have a little gremlin in the G55 and thought I'd reach out to see if anyone has experienced something similar, or can provide a decent suggestion of where I should start...
To keep it short; whenever I turn on the headlights I get a high pitch whining noise from somewhere inside the car. Sound is consistent and is always present while headlights are on. It goes away the second your turn the lights off. Positioning lights or low/high beam make no difference. With DRL only (LED strip below headlights) there is no noise, so "fortunately" it's only bothering me while driving in the dark.
Due to some issues with my hearing I have a hard time locating the source of the sound, but I suspect it's coming somewhere from the passenger side, low down towards the floor.
Any suggestions on what could be the cause of this, or where I should start looking?
Thanks,
CrashworkZ
MBWorld Fanatic!
Joined: Oct 2019
Posts: 5,161
Likes: 1,772
From: Colorado
G550
The HIDs are controlled through a relay or most likely an electronic switch that could be making the noise. Do the lights flicker at all when the noise is present?
Member
Joined: Jul 2019
Posts: 138
Likes: 45
From: Rhode Island
2013 SL550, 2017 GLE350, 2018 Audi Q3
HID headlights use a high voltage power supply that converts the 12 volts to around 25,000 volts to start the lights. Once lit, the only need 80-90 volts to keep running. It sounds like one of the inductors in your lights is "singing". Because these supplies are typically potted, your only option would be to replace the noisy unit.
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Thread Starter
Junior Member
Joined: May 2021
Posts: 28
Likes: 20
From: Sweden
2011 G55 AMG
HID headlights use a high voltage power supply that converts the 12 volts to around 25,000 volts to start the lights. Once lit, the only need 80-90 volts to keep running. It sounds like one of the inductors in your lights is "singing". Because these supplies are typically potted, your only option would be to replace the noisy unit.
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Thread Starter
Junior Member
Joined: May 2021
Posts: 28
Likes: 20
From: Sweden
2011 G55 AMG
So I have an update on this topic and thought I would share. A bit embarrassed for not locating the source of the sound earlier, but it turned out to be the tweeter speaker inside the rear passenger door. Only this one speaker outputting the high pitch sound, and only while headlights are on.
Might have to take it in to the dealer, at least now I know where to point them.
Might have to take it in to the dealer, at least now I know where to point them.
MBWorld Fanatic!
Joined: Oct 2019
Posts: 5,161
Likes: 1,772
From: Colorado
G550
So I have an update on this topic and thought I would share. A bit embarrassed for not locating the source of the sound earlier, but it turned out to be the tweeter speaker inside the rear passenger door. Only this one speaker outputting the high pitch sound, and only while headlights are on.
Might have to take it in to the dealer, at least now I know where to point them.
Might have to take it in to the dealer, at least now I know where to point them.
Thread Starter
Junior Member
Joined: May 2021
Posts: 28
Likes: 20
From: Sweden
2011 G55 AMG
Haha sure, probably won't be a lot more than the mandatory "diagnostics fee" (listening to the sound?). 
No the car is under warranty from MB, and if stereo related it should be covered, otherwise I'd never consider letting the stealership try to deal with it.
No the car is under warranty from MB, and if stereo related it should be covered, otherwise I'd never consider letting the stealership try to deal with it.
