E-Class (W211) 2003-2009

knocking sound

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Old 06-12-2013, 04:41 PM
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13 E350 , 12 BMW 328i
knocking sound

on the driver side, as I turn the wheel from a complete stop, whether its right or left and or when I am parallel parking, I hear a knocking sound, only on the left side.. so this is what I done so far:
replace upper control arm ball joint
replace lower thrust arm with ball joint
lastly just replaced lower ball joint
I still have the knocking sound !!!
I am out of idea's, has anyone also encounter this?
Old 06-12-2013, 07:16 PM
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1999 E300TD
So the car is not moving, just the wheels are turning and you hear a knock!!
Old 06-15-2013, 01:56 PM
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hi plutoe , yes, with the engine on , turning the wheels left or right produces the knocking sound...
Old 06-15-2013, 04:07 PM
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Great, however we still don't know if it's caused by steering or suspension.The only way to determine that is to put the car on a drive on lift(not a four point lift) and have someone stand under the car and you turn the wheels and the person standing locates the noise.
Old 06-26-2013, 11:12 AM
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07 CLS550
Did you guys figure out whats causing that knocking noise?

I have the same knocking sound while turning the wheel to left. Cant figure it out either and I don't have access to a lift.
Old 06-26-2013, 12:37 PM
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1999 E300TD
Most of us, if not all do not have a garage with a lift, what I meant is take the car to an alignment shop---which usually have lifts----meaning you have to spend some money to locate the problem-----whether you let them fix the problem is your choice!!

PS: Additionally we have never heard the sound, yet you indicate that you have the same knocking noise---and I guess that you have now assumed the same problem-----do you see anything wrong with that picture!!

Last edited by Plutoe; 06-26-2013 at 12:45 PM.
Old 07-07-2013, 09:26 AM
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Originally Posted by dacollector
on the driver side, as I turn the wheel from a complete stop, whether its right or left and or when I am parallel parking, I hear a knocking sound, only on the left side.. so this is what I done so far:
replace upper control arm ball joint
replace lower thrust arm with ball joint
lastly just replaced lower ball joint
I still have the knocking sound !!!
I am out of idea's, has anyone also encounter this?
Hi, I am the w211 owner in Hong Kong.
I have the same issue and I have replaced the 4 pieces of power steering bushing recently, the knocking sound is gone.
Old 07-09-2013, 02:46 AM
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13 E350 , 12 BMW 328i
thanks hongkong w211 , would you happen to have pics of what pieces you replaced? this way I know what to order. thanks or a diagram would be sufficient.

Originally Posted by Hongkong w211
Hi, I am the w211 owner in Hong Kong.
I have the same issue and I have replaced the 4 pieces of power steering bushing recently, the knocking sound is gone.
Old 07-09-2013, 01:59 PM
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Originally Posted by dacollector
thanks hongkong w211 , would you happen to have pics of what pieces you replaced? this way I know what to order. thanks or a diagram would be sufficient.
Sorry Dacollector! Aftet the three days keep testing, very strange, the knocking sound is came back today, I will further investigate what's happened and report to you all.

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