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Old 11-03-2020, 09:15 AM
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Strange noise
Any idea? Many thanks!
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Old 11-03-2020, 10:29 AM
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Originally Posted by japamg
Any idea? Many thanks!
ummmm. crickets ??

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Old 11-03-2020, 10:52 AM
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Originally Posted by japamg
Any idea? Many thanks!
Any idea of what?
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Old 11-03-2020, 10:54 AM
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Hahahah

Sorry! I´ve attached the video now I think
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Old 11-03-2020, 10:56 AM
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Is the video of a cold start?
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Old 11-03-2020, 10:59 AM
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Originally Posted by 214c63
Is the video of a cold start?
Correct

Sorry I didn´t give any background.

So noise is just at cold start, then when engine is warmed, it completely goes away
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Old 11-03-2020, 11:04 AM
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It's either the belt and pulley or secondary guide rails (was the latter for me). Take it in and see what the dealer has to say about it.
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Old 11-03-2020, 11:37 AM
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Originally Posted by 214c63
It's either the belt and pulley or secondary guide rails (was the latter for me). Take it in and see what the dealer has to say about it.
Yep, was told the same, it could be the belt.

Something should I be worried about? Was it an easy fix for you?

Thanks a lot
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Old 11-03-2020, 12:18 PM
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isnt this the ticking sound that all the w205s make?
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Old 11-03-2020, 12:33 PM
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Another vid for reference

Thanks
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Old 11-03-2020, 12:43 PM
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Originally Posted by untamedd
isnt this the ticking sound that all the w205s make?
Not sure, didn´t hear it in three years till now
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Old 11-03-2020, 02:02 PM
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Originally Posted by japamg
Not sure, didn´t hear it in three years till now
recently ive started hearing a similar sound since its colder now. there should be a few topics on 'ticking noise' but if I remember correct then people said it was normal apparently.
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Old 11-03-2020, 04:31 PM
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Originally Posted by untamedd
recently ive started hearing a similar sound since its colder now. there should be a few topics on 'ticking noise' but if I remember correct then people said it was normal apparently.
Hope so...
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Old 11-03-2020, 04:35 PM
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Originally Posted by japamg
Any idea? Many thanks!
Sounds like a belt or pulley noise. Not a big deal but just very annoying if you care. I have the same sound also since it has gotten colder, I hear it only on cold starts (chirping/squealing). I had this sound a year ago and I brought it to the dealer twice to get it resolved. All in all they replaced my ac belt, idler pulley, and belt tensioner but then the weather got warm and the sound went away. Just recently when it got cold it happened again but not on every cold start (7 out of 10 cold starts it occurs).
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Old 11-03-2020, 05:08 PM
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I have the same noise. I will be taking it in to get it resolved. Sub'd for a resolution
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Old 11-03-2020, 05:33 PM
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Thank you guys

Let’s see what the final resolution is

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Old 11-03-2020, 05:44 PM
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I've had my belt and ilders/tensioners changed last year as i had squal on cold starts. Now it kind of got colder and it came back ?🤷‍♂️ Not as bad but i can hear it for a couple seconds
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Old 11-03-2020, 05:46 PM
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Originally Posted by Ksun_w205
Sounds like a belt or pulley noise. Not a big deal but just very annoying if you care. I have the same sound also since it has gotten colder, I hear it only on cold starts (chirping/squealing). I had this sound a year ago and I brought it to the dealer twice to get it resolved. All in all they replaced my ac belt, idler pulley, and belt tensioner but then the weather got warm and the sound went away. Just recently when it got cold it happened again but not on every cold start (7 out of 10 cold starts it occurs).
Originally Posted by PaulC63s
I've had my belt and ilders/tensioners changed last year as i had squal on cold starts. Now it kind of got colder and it came back ?🤷‍♂️ Not as bad but i can hear it for a couple seconds
So you guys not planning another visit to dealer?
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Old 11-03-2020, 05:49 PM
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Originally Posted by japamg
So you guys not planning another visit to dealer?
Mine is not that bad it doesn't bother me yet
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Old 11-03-2020, 10:42 PM
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Originally Posted by japamg
Any idea? Many thanks!
That's your pulley and aircon belt. Same thing happened to mine.
Once you change it, it'll be gone 👍
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Old 11-04-2020, 02:40 AM
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Originally Posted by Jimmy_c63s
That's your pulley and aircon belt. Same thing happened to mine.
Once you change it, it'll be gone 👍
Thanks. Will visit the dealer on Friday

Is this an easy work?
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Old 11-04-2020, 02:45 AM
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Originally Posted by japamg
Thanks. Will visit the dealer on Friday

Is this an easy work?
Yep, just undertray off and replace pulley and belt.
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Old 11-04-2020, 03:04 AM
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Originally Posted by Jimmy_c63s
Yep, just undertray off and replace pulley and belt.
Thanks Jimmy
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Old 11-04-2020, 12:45 PM
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Hmmm...I have not noticed this on my C63S coupe...but then again I have catless DP's so my cold starts are kind of dominated by my exhaust...LMAO

But I am need to do a start with the hood opened and jump out and listen???
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Old 11-04-2020, 02:05 PM
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Originally Posted by W205-S
Hmmm...I have not noticed this on my C63S coupe...but then again I have catless DP's so my cold starts are kind of dominated by my exhaust...LMAO

But I am need to do a start with the hood opened and jump out and listen???
Just do a cold start in the morning and listen with the window down, you should be able to hear it
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