shawnwang33

I'm getting this humming sound very often at speeds about 60+.. Does anyone have any similar experience or have any idea what it might be?

colallucg

Did you resolve your humming noise? We have a 2018 CLA250 that just started this noise - 50,900 miles. Once we hit 60mph, the noise starts and stays a constant humming sound/pitch regardless of rpm, gear, acceleration. Noise starts to go away when we slow down lower than 40mph, but picks back up once we accelerate again above 60. Any help is appreciated.

shawnwang33

Yes, it turned out to be a bad windshield weather seal work that was causing the humming noise.

colallucg

Thank you, I’ll communicate that to the dealer and see if it cures the problem!

FarrahJoon

Hi There! I registered for this forum to problem solve a humming noise I am experiencing similar to what you have described. I use a Mac and am not able to view the humming clip by the OP. Was your humming noise anything like this?

The dealership so far is blaming it on the tires and suggesting I replace all 4 tires at my expense. The car has 20,000 miles and I have only put 6k on it since purchase last December.

suzz1150

Thanks for the thread
I just bought a used 2019 C43 making the same sound. I bought the part and great it fixed the problem

shankar

It’s the exact same noise I heard on the attached movie clip. Only mine is very precise between 48-52 mph while coasting. The foot must be off the accelerator at this speed. Dealer claims all cars suffer in this regard. Not true. I have a 2018 GLC 300 which runs great. No noise

W205C43PFL

https://mbworld.org/forums/c450-c43-...-thoughts.html