W221 FRONT SUSPENSION SQUEAK.
Thread Starter
Junior Member
Joined: Mar 2014
Posts: 28
Likes: 2
From: TEXAS, USA
S CLASS W221 S350 AWD, M CLASS W164 ML350 SUV, ROLLS-ROYCE SILVER SERAPH, ASTON MARTIN V12 VANQUISH
W221 FRONT SUSPENSION SQUEAK.
I have on my 2010 W221 S Class 58k miles, a very annoying squeak from the Left Front Suspension.
This can only be heard at very low speed but over the slightest bump or undulation. If the car was not so quiet it would not be heard at all.
It is not from a ball joint or suspension arm pivot.
When I get the car to make the noise by stepping on the left front door tread plate, I, and everyone else hearing it reckon it comes from the left front suspension turret.
It does sound just like a worn Shock Absorber or like a squeak from a rear leaf spring in days gone by.
But of course this car has neither. It has an air suspension strut. I cannot see how it can be anything else, but someone on here once said that these suspension struts don't make any noise and either work or fail.
Anyone else experience a noisy air strut? Is there any cure apart from replacement?
This can only be heard at very low speed but over the slightest bump or undulation. If the car was not so quiet it would not be heard at all.
It is not from a ball joint or suspension arm pivot.
When I get the car to make the noise by stepping on the left front door tread plate, I, and everyone else hearing it reckon it comes from the left front suspension turret.
It does sound just like a worn Shock Absorber or like a squeak from a rear leaf spring in days gone by.
But of course this car has neither. It has an air suspension strut. I cannot see how it can be anything else, but someone on here once said that these suspension struts don't make any noise and either work or fail.
Anyone else experience a noisy air strut? Is there any cure apart from replacement?
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Joined: Mar 2015
Posts: 1,975
Likes: 265
From: Sacramento, CA
2018 GLC300 4Matic; 2008 ML550 4Matic; 2004 C320
I have on my 2010 W221 S Class 58k miles, a very annoying squeak from the Left Front Suspension.
This can only be heard at very low speed but over the slightest bump or undulation. If the car was not so quiet it would not be heard at all.
It is not from a ball joint or suspension arm pivot.
When I get the car to make the noise by stepping on the left front door tread plate, I, and everyone else hearing it reckon it comes from the left front suspension turret.
It does sound just like a worn Shock Absorber or like a squeak from a rear leaf spring in days gone by.
But of course this car has neither. It has an air suspension strut. I cannot see how it can be anything else, but someone on here once said that these suspension struts don't make any noise and either work or fail.
Anyone else experience a noisy air strut? Is there any cure apart from replacement?
This can only be heard at very low speed but over the slightest bump or undulation. If the car was not so quiet it would not be heard at all.
It is not from a ball joint or suspension arm pivot.
When I get the car to make the noise by stepping on the left front door tread plate, I, and everyone else hearing it reckon it comes from the left front suspension turret.
It does sound just like a worn Shock Absorber or like a squeak from a rear leaf spring in days gone by.
But of course this car has neither. It has an air suspension strut. I cannot see how it can be anything else, but someone on here once said that these suspension struts don't make any noise and either work or fail.
Anyone else experience a noisy air strut? Is there any cure apart from replacement?
Senior Member
Joined: Apr 2007
Posts: 352
Likes: 91
I have on my 2010 W221 S Class 58k miles, a very annoying squeak from the Left Front Suspension.
This can only be heard at very low speed but over the slightest bump or undulation. If the car was not so quiet it would not be heard at all.
It is not from a ball joint or suspension arm pivot.
When I get the car to make the noise by stepping on the left front door tread plate, I, and everyone else hearing it reckon it comes from the left front suspension turret.
It does sound just like a worn Shock Absorber or like a squeak from a rear leaf spring in days gone by.
But of course this car has neither. It has an air suspension strut. I cannot see how it can be anything else, but someone on here once said that these suspension struts don't make any noise and either work or fail.
Anyone else experience a noisy air strut? Is there any cure apart from replacement?
This can only be heard at very low speed but over the slightest bump or undulation. If the car was not so quiet it would not be heard at all.
It is not from a ball joint or suspension arm pivot.
When I get the car to make the noise by stepping on the left front door tread plate, I, and everyone else hearing it reckon it comes from the left front suspension turret.
It does sound just like a worn Shock Absorber or like a squeak from a rear leaf spring in days gone by.
But of course this car has neither. It has an air suspension strut. I cannot see how it can be anything else, but someone on here once said that these suspension struts don't make any noise and either work or fail.
Anyone else experience a noisy air strut? Is there any cure apart from replacement?
Senior Member
Joined: Apr 2007
Posts: 352
Likes: 91
Thread Starter
Junior Member
Joined: Mar 2014
Posts: 28
Likes: 2
From: TEXAS, USA
S CLASS W221 S350 AWD, M CLASS W164 ML350 SUV, ROLLS-ROYCE SILVER SERAPH, ASTON MARTIN V12 VANQUISH
This is what I call the Left hand front rear control arm that goes from the chassis to the steering knuckle to which the strut ball joint bolts onto.
The Left hand front rear lower control arm was removed, fully inspected, ball joint rubber boot removed ball swivel inspected for pits or rust, (what you can see of it), fully greased, rubber boot replaced and arm refitted.
The Left hand front rear lower control arm was removed, fully inspected, ball joint rubber boot removed ball swivel inspected for pits or rust, (what you can see of it), fully greased, rubber boot replaced and arm refitted.
