C63 AMG (W204) 2008 - 2015

Vibration in gas pedal (

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Old 05-11-2018, 10:34 PM
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Question Vibration in gas pedal (

Hey all. I noticed Vibration in gas pedal when I do not fast drive 60-70 km. Vibration only in pedal.
My wheels is good! I drive a little. The mileage is 21,000 kilometers.
What could it be?

Last edited by Emkovich; 05-11-2018 at 10:37 PM.
Old 05-14-2018, 03:58 PM
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It could be a bad flex coupling, that connects the transmission to the driveshaft and the driveshaft to the rear axle. It is made out of hard but flexible rubber, if it's bad that could cause your vibration issue.
Old 05-15-2018, 01:59 AM
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I noticed this when coming from driving my newer acura TL to driving this car. Bought the car bone stock and mint with 48k km's. I wouldn't go as far as calling it vibration but I can feel a bit of feedback from the gas pedal when resting my foot on it at idle. I'd assume it's somewhat normal?
Old 05-16-2018, 12:03 AM
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Old 05-17-2018, 03:56 AM
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Old 05-17-2018, 10:55 AM
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I've been feeling this a bit too. It's almost like a feel vibration in the floorboards as opposed to the steering wheel.

My engine mounts are in need of some attention though... I think they're just about toasted at 50k miles and I'm wondering if that could be the cause. As odd as it seems.
Old 05-21-2018, 03:36 AM
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I checked my wheels - they are excellent.
The vibration in the gas pedal is definitely not coming from them.
Old 05-22-2018, 01:40 PM
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2013 W204 C63 AMG, 2008 W221 S65 AMG
Engine mounts + gearbox mounts.
Old 05-22-2018, 02:07 PM
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Originally Posted by alexanderfoti
Engine mounts + gearbox mounts.
That's what I'm thinking. I can barely fit 1 index finger in between my engine and the sway bar...
Old 05-23-2018, 03:56 AM
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I will check it, Thanks!

What distance should be in between in engine and the sway bar?
Old 05-23-2018, 05:30 AM
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Can this vibration be due to the driveshaft center bearing?

Last edited by Emkovich; 05-23-2018 at 05:32 AM.
Old 05-23-2018, 09:45 AM
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Originally Posted by Emkovich
I will check it, Thanks!

What distance should be in between in engine and the sway bar?
Should be at least an index finger.
Old 05-23-2018, 09:46 AM
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Originally Posted by Emkovich
Can this vibration be due to the driveshaft center bearing?
Could be
Old 05-27-2018, 05:28 PM
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Was today on the diagnostic from an official dealer. No problems were found.
Noticed that the engine is slightly tilted to the right side of the passenger. That is how it should be?
Old 05-28-2018, 02:38 PM
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Originally Posted by Emkovich
Was today on the diagnostic from an official dealer. No problems were found.
Noticed that the engine is slightly tilted to the right side of the passenger. That is how it should be?
Wouldn't that be due to a collapsed motor mount?
Old 05-29-2018, 11:39 AM
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What year is the ca?

Thats low mileage....did the car sit a lot? Old tires/flat spots??
Old 05-29-2018, 11:44 AM
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Originally Posted by m a x i m u s
Wouldn't that be due to a collapsed motor mount?
Yes, Many dealers miss mounts. I would change them anyway, they are not that expensive and are known to wear after 4 years/30k
Old 06-25-2018, 06:24 AM
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I changed the engine and transmission mounts... But the vibration did not completely disappear.
Old 06-25-2018, 06:25 AM
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Originally Posted by Emkovich
I changed the engine and transmission mounts... But the vibration did not completely disappear.
There will always be some vibration! Is it possible you are now super sensitive as you have been feeling for it?

Check the smooth running value on star, sometimes an air leak at the inlet manifold can cause a slightly uneven idle.
Old 07-13-2018, 09:23 AM
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Originally Posted by Emkovich
I changed the engine and transmission mounts... But the vibration did not completely disappear.
Same here. Replaced both engine and trans mounts and nothing changed. I don't know where to look next other than drive shaft or flex disk. I feel the vibration through the gas pedal, floor boards, and can even see the passenger seat shaking about while driving when no one's sitting in it.

Edit: did something somewhat sketchy, but needed to diagnose. Put the rear of my car on jack stands, wheels on, to diagnose whether this was a front end or rear end/drive line vibration. The second I hit 60 mph, chassis vibration started. Next step is even slightly sketchier -- take the wheels off and go back up to 60 and see whether I have wheel vibration, or something in the drive line.

Last edited by AMG3.2; 07-13-2018 at 10:49 AM.
Old 07-13-2018, 12:35 PM
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Wheels out of balance?
Old 07-13-2018, 12:54 PM
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Originally Posted by gtracer
Wheels out of balance?
I'm hoping so but I don't think it'll be that easy. Thinking it could be a bend somewhere. I'm going to put them back on the car while on jack stands and let the car idle. I'll test run out that way both lateral and radial.
Old 07-14-2018, 02:53 AM
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Not many things left to check. Driveshaft. Bent suspension arm perhaps? Loose steering tie rod ends could cause a shimmy at speed. Check all the subframe bolts too if you’ve ever had that apart.

Also, I know you’ve played around with your struts/springs quite a bit. I’m guessing that they’re seated properly, but maybe taking the suspension apart and putting it back together again you may find something. Did this start happening around the time you were making all those changes?
Old 07-14-2018, 09:28 AM
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Originally Posted by BLKROKT
Not many things left to check. Driveshaft. Bent suspension arm perhaps? Loose steering tie rod ends could cause a shimmy at speed. Check all the subframe bolts too if you’ve ever had that apart.

Also, I know you’ve played around with your struts/springs quite a bit. I’m guessing that they’re seated properly, but maybe taking the suspension apart and putting it back together again you may find something. Did this start happening around the time you were making all those changes?
I've been thinking driveshaft too, but I actually got around to take my wheels off last night and run the car up to 70 MPH while on jack stands, and without the wheels, the car is much much smoother so I've narrowed the cause of vibration down to the rear wheels.

Next step is new tires with Road Force balance. I don't see how they could be bent as I haven't hit anything... Given that they are 3 piece wheels, they probably have a bit of run out, but I'm hoping the match mounting of a Road Force balancer can help in that arena. Maybe I've thrown a few weights over the last few months that I haven't noticed? Who knows, but I'll figure it out.
Old 12-01-2018, 03:04 AM
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Originally Posted by AMG3.2
I've been thinking driveshaft too, but I actually got around to take my wheels off last night and run the car up to 70 MPH while on jack stands, and without the wheels, the car is much much smoother so I've narrowed the cause of vibration down to the rear wheels.

Next step is new tires with Road Force balance. I don't see how they could be bent as I haven't hit anything... Given that they are 3 piece wheels, they probably have a bit of run out, but I'm hoping the match mounting of a Road Force balancer can help in that arena. Maybe I've thrown a few weights over the last few months that I haven't noticed? Who knows, but I'll figure it out.
hi did you have any fix for this? I’m experiencing the same problem. Thanks in advance


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