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Strange noise from 60-75km/h

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Old Nov 23, 2024 | 05:09 PM
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W205 220d bluetech
Strange noise from 60-75km/h

hello friends,I have a w205 220d bluetech 2015. Automatic. In the last few days, as the temperatures have dropped, I notice a buzzing sound while driving, when the engine is cold. The sound is heard between 60-75 km/h, as soon as the temperature rises and the car drives a little, the sound disappears. Does anyone know what this is about, is it normal? Please help ! I have video sound of this but i am not able to upload it.
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Old Nov 23, 2024 | 07:14 PM
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Originally Posted by IvanMBDuv
hello friends,I have a w205 220d bluetech 2015. Automatic. In the last few days, as the temperatures have dropped, I notice a buzzing sound while driving, when the engine is cold. The sound is heard between 60-75 km/h, as soon as the temperature rises and the car drives a little, the sound disappears. Does anyone know what this is about, is it normal? Please help ! I have video sound of this but i am not able to upload it.
Hmmm when I hear the word buzzing, I think of speakers, could the speakers be buzzing when the vehicle is cold due to the vibrations from the engine? Sort of like a rattle but not really.

As for uploading a video, can be done through youtube and then linking it.
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Old Nov 24, 2024 | 02:24 AM
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W205 220d bluetech
Originally Posted by W205C43PFL
Hmmm when I hear the word buzzing, I think of speakers, could the speakers be buzzing when the vehicle is cold due to the vibrations from the engine? Sort of like a rattle but not really.

As for uploading a video, can be done through youtube and then linking it.
I upload video you can hear it here.
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Old Nov 24, 2024 | 08:18 AM
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Originally Posted by IvanMBDuv
I upload video you can hear it here.
https://youtube.com/shorts/aRI9X_I_X...8O22pJV8MQNxOz
It sounded like a bad speaker at first but it also sounded like a differential issue, differentials on these vehicles needs to be serviced from time to time. Does the vehicle have 4MATIC? You mentioned automatic but not sure if you meant 4MATIC. If the vehicle has rear differential, you need to change the fluid in it.
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Old Nov 24, 2024 | 03:45 PM
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W205 220d bluetech
Originally Posted by W205C43PFL
It sounded like a bad speaker at first but it also sounded like a differential issue, differentials on these vehicles needs to be serviced from time to time. Does the vehicle have 4MATIC? You mentioned automatic but not sure if you meant 4MATIC. If the vehicle has rear differential, you need to change the fluid in it.
i dont have 4 matic just rear differential. So that can be problem i let you know when i check that differential fluid!
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Old Nov 24, 2024 | 05:04 PM
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Originally Posted by IvanMBDuv
i dont have 4 matic just rear differential. So that can be problem i let you know when i check that differential fluid!
Sounds good, hopefully it is just old fluid causing issues.
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