So I went out to my car to get something, hours after last driving it, and it's making an odd squeal... constantly! It happens about every 30 seconds or so and I am dumbfounded.

Noise is once right at the beginning and again at about 28 seconds...

Any ideas? Video attached!

 

There are allot including myself who hear the same thing.

https://mbworld.org/forums/c63-amg-w...out-noise.html

I've heard it many times but have not been too concerned.

 

I got this same noise when i first brought home my C63, but never heard it again

 

Interesting... I've never heard it before today. Oh well, chalk it up to another "normal" MB quirk I suppose!

 

sounds like the noise the throttle valves make. never noticed this or heard of anyone complaining before.

 

Mine makes that sound all the time. Perfectly normal.

 

AFAIK a lot of the cars make it, although some are higher-pitched than others and almost out of hearing range. From what I've been told, it's a normal noise created by some of the electronic "housekeeping" systems in the car that stay alive after you shut it off. Yours just happens to be lower-pitched and thus more audible.

 

My CLS63 doesn't squeal, but it does breathe after I turn it off. I go out and I hear sounds from it like it is taking a breath.

 

Either coolant system depressurizing (air being drawn in the coolant expansion tank as the coolant level drops), or alterantively the heater & A/C fan motor turning on at low speeds to dry out the A/C evaporator so you don't get mold build-up due to residual mositure in the system and the resulting musty cabin smell.

 

I think you're getting a fax. AMG means business!!!

Sorry not helpful at all, haha.

 

ROTFL You're right, it does sound like a fax in the video.

 

haha! I was thinking more along the lines of dial-up AOL... "You've Got Mail!"