vsnlweb

Hey Guys,

So, I've only had my car for about 2 weeks, and now I noticed that there is a knocking sound when I go over bumps, and the engine restarts on the Stop/Start. Have't had the time to notify the dealer as I've been pretty busy. But just wondering if you guys have experienced this problem. Oh... And I can usually hear when turning left, but not turning right. Seems odd to me.

Any insight would be grateful. I plan on going to dealer soon.

SBH-

that's very odd ... I cant get my head around the fact that people are still experiencing such things 2 years into the production of the car ! tbh this is the first time I hear such thing .. unusual !

I guess you have to take it to the dealer very soon dude

Sanch

I had a similar annoying sound in my coupe... I finally figured it out, it was the passenger seatbelt hitting the passenger seat.

It's still there, need to figure out how to stop it.

SBH-

isn't there the magnet on the top corner of the seat ? I know its there in my sedan's recaro seats?

vsnlweb

And to add to things, When I got into my car today for the first time, I got the Parking Brake Warning Light. :SMH:

DZ8222

Yep, this is making the sound, want to know a way to stop it too.

RDOCA

come-on guys --just buckle the seat belt when you don't have a passenger as I do on my sedan.

SBH-

hahaha simple as it sounds !

VaserC63S

Was just about to tell them to use 3m tape and velcro a patch on the hard shell of the sports seats where the belt buckle hits. And right, with passenger on no knocking. Just clip the belt in and ride around and you'll see there is no weird knocking. I think the mysterious rattles, knocks and sights of weird things can all be simply explained.

SBH-

but for the performance seats, there's a magnet on the top left corner of the hard shell where you can put the buckle so that it stays still.

CT-AMG

SBH- I just checked my performance seats and can find no magnet to secure the buckle. Any chance you could post a photo as to where it is?

DZ8222

I cannot find it too.

RDOCA

what are you smoking?

SBH-

there was an old thread on here, which said the same thing and had photos as well. Ill look for it.

SBH-

I cant seem to find that old thread, I looked through 20 pages yet didn't find it ...

ill be posting a pic later today to show the exact location.

SBH-

anyway, I don't deny that its very hard to locate, and it might not work easily, took me a while to do it, but I gave up cuz every time rides and wears the seatbelt I have to attach it again and it just keeps going on if you understand what I mean

DZ8222

Waiting for your pic!

CPatrick

I have the same "rattle" issue coming from the passenger seat area, but haven't had time to locate the source. Makes sense that it's the seat belt. I've put 700 miles on the car, and this started happening about 2 days ago, after I had a passenger.

Thanks for pointing me in the right direction.

VaserC63S

Its the seatbelt buckle hitting the chair. By the way I think SBH- is joking about the mysterious magnet and you are all falling for it. I have those same seats but no magnet I can find. Tie a piece of mitt around the buckle it's easily reversible too.

SBH-

totally forgot about it , damn today I promise

darwin329

found the magnet yet.

vsnlweb

Mine was not coming from the passenger seat area... But the front passenger side of the car... More or less when I go over rough road is when I hear the knocking. Someone said either a a loose engine mount, or I am guessing something with the suspension.

VaserC63S

So I have been looking for the mysterious magnet for the seatbelt buckle and and found it this evening and it actually works very well. Mercedes knew about the knocking noise and did a solution. Great except who the hell thought hiding it underneath the leather was a good idea?

Even the dealer not only can't find it, they don't even know it's there! Nice job Mercedes, but this was a poor communication made worse by just confounding implementation of a good solution. So many people think their new C63S is rattling when you already have a solution.

Enough ranting. Click on the image to see the location if its too small.
Go back to enjoying your cars guys.

Sanch

Finally, good to know... I hope its the same for the coupe.

The noise is so damn annoying!!!

RDOCA

And I thought you were full of it. But you are right it does actually exist.
I tried it and it is there and works. Nice find.