w204 weird sound emitting on front left during uneven road braking

[undercoverbeast]

Hi guys,

recently facing a issue on my car.

my w204, when i am doing braking on uneven road, the front left side will produce a squeaking sound ( sound like old rocking chair ) the sound actually will sound like eeeeek oorkkkk but with a mixture of tak tak tak ( sound like some hard rubber banging on metal sound ?)   Both sound will last continuously before coming to a complete stop on an uneven road.  It can be heard clearly in the cabin itself, and the sound sounded it is somewhere near. But definitely came from the front passenger side.

when i depress the brake  and go through a speed hump, it will sound like something is being compressed, for eg: when the front left wheel touches the hump with the brakes being depress and it will actually make a very loud squeaky ( eeek orkk ) sound and ending with a tok, ( i hope the way i describe the sound helps to justify what is wrong ) 

 

Car sound completely quiet during normal drive on expressway and even passing through uneven road , ( probably maybe a faint thub sound ) , braking on smooth surfaces road is perfectly fine, no sound. 

Recently replace the end link at 1 of the site sponsors, 

 

Can anybody please advise what is wrong?

Diff workshops gave me different advises.                        
 

Personal guess:  top mount or bushings for some particular parts. 

As currently on lowering springs, absorbers were last checked to be working fine, but not in perfect condition.

[Ody_2004]

What is the mileage of the car? How long you on a lowered suspension? How you test the absorbers are fine?

What the workshop narrowed to and which workshop?

It could be tie rod, lower arm bushing,even steering rod/column etc..

[undercoverbeast]

Thanks for the advise bro,

springs was change few months ago, current car mileage : 100500

while installing the springs, did ask a workshop Mechanic to check whether is there any leak or whatever, was told to be useable.

chnage the end link last week before CNY at b**l***, they mention everything is ok, beside the end link, and the faint thub noise coming from the suspension. 

Initially thought after changing end link, the problem will resolve as previously the damaged end link is the caused of all the toktok sound. 

Diff workshop narrow diff stuffs. Wouldn't want to take the risk to replace something that won't solve the issue, rather than I found the right workshop to carry out the replacement. As having sound that are not suppose to be on your car is the most headache issue to solve..

[Ody_2004]

At 100k mileage alot of things could have worn out.

absorbers if from new car till now could be worn out too especially with lowered spring.

the end link u refer to tie rod?

did the workshops hoist up the car to check?

[undercoverbeast]

I agree, Lots of thing could be have worn out, Guess I will go to a workshop and do a 100% check this weekend. 

I didn't mention the issue I'm facing to them, so to be fair, they only change  the end link for me that I requested and solve the Tok Tok sound during uneven road. 

End link im referring to is : 

 connect the vehicle stabilizer bar (or sway bar) to the control arms.

 

[Ody_2004]

Tell them what you facing and if they hoist car up to check should be able to narrow it down.

guess nothing major but just wear and tear.

Good luck