Front Strut Movement Question
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CL55
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From: DownEast Maine
CLS 55 AMG E500 ML320
The pattern is worn into the front tires now. I would suggest you check or replace every bushing and ball joint that's not new, then grind the uneven tread off your front tires, or just buy new ones again. Then set the toe-in at less than half what is recommended. Just inside of 0. Check the wheel balance and you will run smooth for a while, depending on your treadwear rating.
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CL55
I'm also replacing the flex discs and drive shaft support on Sunday. That should be the last of it. Although, I am hearing a bumping type sound coming from the rear over small bumps during slower driving
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From: DownEast Maine
CLS 55 AMG E500 ML320
It's hard to diagnose over the internet, but check your tires carefully (especially the inside edge) for tread block edges taller than other tread blocks. 500 miles was enough to do it on mine with a 240 tread wear rating.
Drive shaft support would be a totally different type of vibe, hope you get it figured.
Drive shaft support would be a totally different type of vibe, hope you get it figured.
Thread Starter
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Joined: Dec 2014
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CL55
It's hard to diagnose over the internet, but check your tires carefully (especially the inside edge) for tread block edges taller than other tread blocks. 500 miles was enough to do it on mine with a 240 tread wear rating.
Drive shaft support would be a totally different type of vibe, hope you get it figured.
Drive shaft support would be a totally different type of vibe, hope you get it figured.
The symptom that makes this strange is that the vibration almost completely disappears after the car has been on a lift and then returns after a day or so. It would stand to reason that inconsistent tire wear would produce a vibration regardless of other factors. Thats what is making me think driveshaft.
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From: DownEast Maine
CLS 55 AMG E500 ML320
Don't know anything about ABC, is it possible for one shock to get pulses from the pump or maybe a fluttering valve in the system. I'm just guessing wildly now, let a really good mechanic drive it.
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From: Welwyn, Herts, UK
2006 S600
I think that's very unlikely. Hydraulic pulses are absorbed by the accumulator on the pressure regulator, and by the flexible hydraulic hoses. When one of those fails or degrades, the result is noise, rather than vibration.
In any case, internal vibration in the strut would be absorbed by the suspension spring itself.
Nick
In any case, internal vibration in the strut would be absorbed by the suspension spring itself.
Nick
Thread Starter
Senior Member
Joined: Dec 2014
Posts: 286
Likes: 4
CL55
I think that's very unlikely. Hydraulic pulses are absorbed by the accumulator on the pressure regulator, and by the flexible hydraulic hoses. When one of those fails or degrades, the result is noise, rather than vibration.
In any case, internal vibration in the strut would be absorbed by the suspension spring itself.
Nick
In any case, internal vibration in the strut would be absorbed by the suspension spring itself.
Nick
