Whistling Noise when foot on pedal
Thread Starter
Junior Member
Joined: Aug 2024
Posts: 16
Likes: 0
2017 C43 AMG Sedan
Whistling Noise when foot on pedal
Hello everyone,
I have a 2017 c43 sedan (110k km)
When i am going around 70-90km/h and have my foot slightly on the gas pedal just to maintain constant speed. I get this high pitched whistle /humming noise. Once i remove my foot off of the pedal it stops, but once i press gas again just slightly the whistle starts again.
It’s not easy to hear on video but it sure is prominent when driving you can faintly hear it with radio on. (i think i saw a thread on a forum where this was happening but when not pressing the gas pedal, opposite to my issue, it was related to their rear diff) I am wondering if this could be the same thing.https://drive.google.com/file/d/1ic2...w?usp=drivesdk
https://drive.google.com/file/d/18HT...w?usp=drivesdk
https://drive.google.com/file/d/1Qzr...w?usp=drivesdk
I dont have warranty, what would be the best course of action.
Also any ideas what it could be if its not front diff.
Ps. I recently put on a new set of tires in the front, dont think there is a relation, but if you needed to know.
I have a 2017 c43 sedan (110k km)
When i am going around 70-90km/h and have my foot slightly on the gas pedal just to maintain constant speed. I get this high pitched whistle /humming noise. Once i remove my foot off of the pedal it stops, but once i press gas again just slightly the whistle starts again.
It’s not easy to hear on video but it sure is prominent when driving you can faintly hear it with radio on. (i think i saw a thread on a forum where this was happening but when not pressing the gas pedal, opposite to my issue, it was related to their rear diff) I am wondering if this could be the same thing.https://drive.google.com/file/d/1ic2...w?usp=drivesdk
https://drive.google.com/file/d/18HT...w?usp=drivesdk
https://drive.google.com/file/d/1Qzr...w?usp=drivesdk
I dont have warranty, what would be the best course of action.
Also any ideas what it could be if its not front diff.
Ps. I recently put on a new set of tires in the front, dont think there is a relation, but if you needed to know.
MBWorld God!
Joined: Dec 2019
Posts: 32,217
Likes: 6,275
Hello everyone,
I have a 2017 c43 sedan (110k km)
When i am going around 70-90km/h and have my foot slightly on the gas pedal just to maintain constant speed. I get this high pitched whistle /humming noise. Once i remove my foot off of the pedal it stops, but once i press gas again just slightly the whistle starts again.
It’s not easy to hear on video but it sure is prominent when driving you can faintly hear it with radio on. (i think i saw a thread on a forum where this was happening but when not pressing the gas pedal, opposite to my issue, it was related to their rear diff) I am wondering if this could be the same thing.https://drive.google.com/file/d/1ic2...w?usp=drivesdk
https://drive.google.com/file/d/18HT...w?usp=drivesdk
https://drive.google.com/file/d/1Qzr...w?usp=drivesdk
I dont have warranty, what would be the best course of action.
Also any ideas what it could be if its not front diff.
Ps. I recently put on a new set of tires in the front, dont think there is a relation, but if you needed to know.
I have a 2017 c43 sedan (110k km)
When i am going around 70-90km/h and have my foot slightly on the gas pedal just to maintain constant speed. I get this high pitched whistle /humming noise. Once i remove my foot off of the pedal it stops, but once i press gas again just slightly the whistle starts again.
It’s not easy to hear on video but it sure is prominent when driving you can faintly hear it with radio on. (i think i saw a thread on a forum where this was happening but when not pressing the gas pedal, opposite to my issue, it was related to their rear diff) I am wondering if this could be the same thing.https://drive.google.com/file/d/1ic2...w?usp=drivesdk
https://drive.google.com/file/d/18HT...w?usp=drivesdk
https://drive.google.com/file/d/1Qzr...w?usp=drivesdk
I dont have warranty, what would be the best course of action.
Also any ideas what it could be if its not front diff.
Ps. I recently put on a new set of tires in the front, dont think there is a relation, but if you needed to know.
https://mbworld.org/forums/c450-c43-...-thoughts.html
Although it could be tires, had the exact same issue and replaced rear diff it happens for me when both coasting and on light throttle at those speeds.
Thread Starter
Junior Member
Joined: Aug 2024
Posts: 16
Likes: 0
2017 C43 AMG Sedan
Thats what i was thinking, Do you know what a job like this would cost me without warranty.
Should i get it fixed asap due to it potentially causing other issues/damages or its not that serious except for a annoying *** noise.
Should i get it fixed asap due to it potentially causing other issues/damages or its not that serious except for a annoying *** noise.
MBWorld God!
Joined: Dec 2019
Posts: 32,217
Likes: 6,275
There are other causes such as transmission mount (although it is premature I think at your mileage).
Thankfully the transmission mount is super easy to change on our cars.
Member
Joined: Sep 2017
Posts: 136
Likes: 28
From: Toronto
C43 2017
I used to have the same sound..almost like a slight whirring whining sound that would coincide with being on the pedal gently and or actually coasting from 50km to 80km an hour. I found after changing out oe rims and runflat tires it has all but vanished or at least is better.
I never worried about it as it was there from new. Lets be honest the 4 matic system is good but quiet it is not. My c300..c400..all had similiar noises.
It reminds me of the noise my old motorcyle a 84 honda nighthawk..which had drivetrain whine and lash like no tommorow due to it being a shaft drive which was new technology then. Unrepairable just poor design.
My 2018 still going strong at 120000 km good as new a virgin untouched by the stealership.
Its like having a small click in your knee with no pain and going for a knee replacement. Last thing I would do is rip my car apart like many have done with this same issue and ended not resolving the issue after much money time and headaches.
My advice put it in sports+ turn up the tunes and enjoy.
My 2c
I never worried about it as it was there from new. Lets be honest the 4 matic system is good but quiet it is not. My c300..c400..all had similiar noises.
It reminds me of the noise my old motorcyle a 84 honda nighthawk..which had drivetrain whine and lash like no tommorow due to it being a shaft drive which was new technology then. Unrepairable just poor design.
My 2018 still going strong at 120000 km good as new a virgin untouched by the stealership.
Its like having a small click in your knee with no pain and going for a knee replacement. Last thing I would do is rip my car apart like many have done with this same issue and ended not resolving the issue after much money time and headaches.
My advice put it in sports+ turn up the tunes and enjoy.
My 2c
Thread Starter
Junior Member
Joined: Aug 2024
Posts: 16
Likes: 0
2017 C43 AMG Sedan
I used to have the same sound..almost like a slight whirring whining sound that would coincide with being on the pedal gently and or actually coasting from 50km to 80km an hour. I found after changing out oe rims and runflat tires it has all but vanished or at least is better.
I never worried about it as it was there from new. Lets be honest the 4 matic system is good but quiet it is not. My c300..c400..all had similiar noises.
It reminds me of the noise my old motorcyle a 84 honda nighthawk..which had drivetrain whine and lash like no tommorow due to it being a shaft drive which was new technology then. Unrepairable just poor design.
My 2018 still going strong at 120000 km good as new a virgin untouched by the stealership.
Its like having a small click in your knee with no pain and going for a knee replacement. Last thing I would do is rip my car apart like many have done with this same issue and ended not resolving the issue after much money time and headaches.
My advice put it in sports+ turn up the tunes and enjoy.
My 2c
I never worried about it as it was there from new. Lets be honest the 4 matic system is good but quiet it is not. My c300..c400..all had similiar noises.
It reminds me of the noise my old motorcyle a 84 honda nighthawk..which had drivetrain whine and lash like no tommorow due to it being a shaft drive which was new technology then. Unrepairable just poor design.
My 2018 still going strong at 120000 km good as new a virgin untouched by the stealership.
Its like having a small click in your knee with no pain and going for a knee replacement. Last thing I would do is rip my car apart like many have done with this same issue and ended not resolving the issue after much money time and headaches.
My advice put it in sports+ turn up the tunes and enjoy.
My 2c
MBWorld God!
Joined: Dec 2019
Posts: 32,217
Likes: 6,275
Thanks for the reply, I only started noticing this noise ever since I changed my front tires. I originally had 225/45/18 but they were finished so i wanted to find a set that matched the back two tires. I found some 235/45/18’s i made sure they would fit online and they fit the rims, so i put them on. Maybe since they are a bit bigger it’s putting some extra tension on the rear diff/drive shaft.
