guynamedsean

So my 507 is past 1200 miles and I'm easing into hard driving. Now that I've put it in sport+ ,automatic, and floored it and let it shift on its own, at redline, I'm noticing a loud "squeak" or "chirp" sound.
It will happen if the throttle is floored and the car shifts at redline. I cannot figure out what the noise is though or determine if it's normal.

It seems to happen most when the car shifts hard or jerks so I was thinking maybe suspension squeak of motor moving. That didn't seem plausible though. Then I thought maybe it's a second and third gear split second peel out, tires chirping, causing the jerk etc.

Does anyone know what I'm hearing???

My car drives awesome, so I'm hoping it's a normal sound.

CarHopper

My guess would be tires. Just keep an eye on it but as long as you have no CELs you're going to be set.

boosting1bar

I get that exact same sound on upshift in my 507, definitely not the tires but I have no idea wtf it is.

the_indian_kid

Yeap..had that happen to me as well....have not noticed it much now at 20 000 km. 507 coupe.

guynamedsean

Thanks for the replies guys. Sounds like it's nothing to worry about.

m a x i m u s

Just have it checked by the dealership. Take the shop foreman for a test drive and let him hear it.

ms_

+1 I thought I was going crazy! 507 with 3800km.. Anyone actually asked the dealer?

JRHolt

Hmmm... have never noticed it. Guess I will check it out on my way home from work today

Magno507

this happens to me also sometimes.. I spoke to MB mechanic he said its normal It's the wet clutch in the trans converter.

solekeeper

on every shift? is engine warmed up properly?

JRHolt

Forgot to check back with you guys after my drive home. If you turn down the radio, make sure the air conditioner isn't blasting and really pay attention you can actually hear it on every up-shift at wide open throttle. Not really that noticeable unless you are really listening for it.

Good to know that it is normal, I figured it had something to do with the wet clutch system

Emkovich

i have this problem too! I believe that this is not normal! Here's my post...
https://mbworld.org/forums/c63-amg-w...ml#post6509030

PeterUbers

I don't have this noise ... Mct transmission here

Magno507

so everyone who this doesnt happen to it cracks on every upshift? (redline)

Joel Salinas

I am having the same issue to When I put my car in manual mode it sounds like a squill is coming from the engine I don't know if it's the idler pulley or the gear Box my car only has 56k miles 🤷‍♂️

shane060

Did anyone figure out what the sound was or if its normal or an issue? my 2018 C63s is doing this in 3rd as well a buddies 2016 c63s. different platform I know but same sound so very interesting to stumble upon this with W204 owners.