C55T - Vibration under load above 55 mph
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Joined: May 2009
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C55 - Vibration under load above 55 mph (solved)
Hey everyone,
Currently fixing up my C55. The vehicle is fully MB serviced and is generally in a good condition.
When I test drove the vehicle, I had no vibrations. Since I bought the vehicle with summer tires, I bought an additional set of AMG 18 Inch. These were used and two rims were bent. I immediately realized I had vibrations so I got the wheel balanced which didn't help. I ended up returning the wheels to the seller and put my summer wheels back on. Unfortunately, slight vibrations remained. In the meanwhile I purchased AMG rims with new tires for the vehicle, but this didn't change anything regarding the vibrations.
The slight vibrations started at 55 mph. They were oscillating/pulsating and also stayed there when I let the vehicle roll.
The wheel drive shafts have no noticeable wear or knock sound when moved up and down.
Any ideas or experience with this issue?
Your help is highly appreciated!
Currently fixing up my C55. The vehicle is fully MB serviced and is generally in a good condition.
When I test drove the vehicle, I had no vibrations. Since I bought the vehicle with summer tires, I bought an additional set of AMG 18 Inch. These were used and two rims were bent. I immediately realized I had vibrations so I got the wheel balanced which didn't help. I ended up returning the wheels to the seller and put my summer wheels back on. Unfortunately, slight vibrations remained. In the meanwhile I purchased AMG rims with new tires for the vehicle, but this didn't change anything regarding the vibrations.
The slight vibrations started at 55 mph. They were oscillating/pulsating and also stayed there when I let the vehicle roll.
The wheel drive shafts have no noticeable wear or knock sound when moved up and down.
Any ideas or experience with this issue?
Your help is highly appreciated!
Last edited by amgfreak87; Feb 17, 2021 at 05:17 AM.
Junior Member
Joined: Mar 2014
Posts: 48
Likes: 3
W203
If I have to guess, I would probably look at:
However, most Tech only balances a wheel "halfway"
i.e. machine say 30 gram, so they do that.
A well trained Tech will rotate the wheel "heavy side" to the rims "lightest side" so you minimise weights to be added.
Keep us posted what you see and find on your car.
- shocks
- lower control arms
- upper control arms
- rear 5 link bushes x2 (dont forget small bushings at the bottom)
- anti roll bar bushes (front and back)
- sub-frame bushes
- Diff bushings ( 2 at back 1 in the middle)
However, most Tech only balances a wheel "halfway"
i.e. machine say 30 gram, so they do that.
A well trained Tech will rotate the wheel "heavy side" to the rims "lightest side" so you minimise weights to be added.
Keep us posted what you see and find on your car.
Thread Starter
Member
Joined: May 2009
Posts: 79
Likes: 31
.
If I have to guess, I would probably look at:
However, most Tech only balances a wheel "halfway"
i.e. machine say 30 gram, so they do that.
A well trained Tech will rotate the wheel "heavy side" to the rims "lightest side" so you minimise weights to be added.
Keep us posted what you see and find on your car.
- shocks
- lower control arms
- upper control arms
- rear 5 link bushes x2 (dont forget small bushings at the bottom)
- anti roll bar bushes (front and back)
- sub-frame bushes
- Diff bushings ( 2 at back 1 in the middle)
However, most Tech only balances a wheel "halfway"
i.e. machine say 30 gram, so they do that.
A well trained Tech will rotate the wheel "heavy side" to the rims "lightest side" so you minimise weights to be added.
Keep us posted what you see and find on your car.
will re-visit those parts and report.
Thread Starter
Member
Joined: May 2009
Posts: 79
Likes: 31
.
yes, car is 100% stock.
I am under the impression the vibrations are also present when rolling again, but they are stronger under load.
Last edited by amgfreak87; Feb 10, 2021 at 05:44 AM.
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Junior Member
Joined: Mar 2014
Posts: 48
Likes: 3
W203
This might sound silly, but do you have a go-pro?
If you mount it in such a way that it is looking towards the driveshaft, more specifically the centre bearing (which you already replaced) you can quickly pick up any movement while accelerating.
Similarly, you can also mount it at the front or rear suspension (or wheel movement). Just remember to strap a LED or something for light. That is if it is to dark.
Just an idea to try and isolate the area.
If you mount it in such a way that it is looking towards the driveshaft, more specifically the centre bearing (which you already replaced) you can quickly pick up any movement while accelerating.
Similarly, you can also mount it at the front or rear suspension (or wheel movement). Just remember to strap a LED or something for light. That is if it is to dark.
Just an idea to try and isolate the area.
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Thread Starter
Member
Joined: May 2009
Posts: 79
Likes: 31
.
This might sound silly, but do you have a go-pro?
If you mount it in such a way that it is looking towards the driveshaft, more specifically the centre bearing (which you already replaced) you can quickly pick up any movement while accelerating.
Similarly, you can also mount it at the front or rear suspension (or wheel movement). Just remember to strap a LED or something for light. That is if it is to dark.
Just an idea to try and isolate the area.
If you mount it in such a way that it is looking towards the driveshaft, more specifically the centre bearing (which you already replaced) you can quickly pick up any movement while accelerating.
Similarly, you can also mount it at the front or rear suspension (or wheel movement). Just remember to strap a LED or something for light. That is if it is to dark.
Just an idea to try and isolate the area.
