E-Class (W211) 2003-2009

Front Suspension Knocking When Braking

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Old 12-12-2013, 01:07 PM
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2005 E240 Avantgarde
Front Suspension Knocking When Braking

Hello everyone, I have a problem with my car.

When the car runs very slowly (less than 10 kmh), for example when I got stuck on some stuck and go traffic, then I hit the brake hardly/suddenly/strongly, some strange knocking sound came from my front left suspension (my car is RHD). That strange sound didn't come when I hit the brake gently.

I dont know where it came from but front passenger (my car is RHD) could feel that knock on their foot. I've checked my suspension, I've replaced the R/L shock absorbers, R/L long tie rod, R/L ball joints, I've tightened the arm, and the other parts seems alright, the brake pad condition is about 40%.

There are no sound when I hit the brake gently. There are no sound when I braking on higher speed. There are no sound when I hit the brake in stop position (neutral) either the engine on or off.

Can anyone help me? Is there any problem with my SBC since SBC controlled brake pressure on each tire? Any comment will be appreciated. Thank you.

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