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post #1 of 7 (permalink) Old 05-04-2011, 08:29 PM Thread Starter
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Unhappy Just became a member. Question about suspension.

Hi guys. I am very new to this site. I have a recently purchased 2007 CLK550 Convertible. I am having problem with the clunk noise I hear from the frontend of the CLK550 when I hit a bump even at very low speeds. I had it checked and they tell me the frontend is OK and so I was wondering if anybody had this kind of problem. Could it be from faulty shocks? The suspension bushings? Or could it be from engine or transmission mounts? But it feels like it’s coming from the connections to the wheels. This problem is making me very frustrated and I just am looking for any kind of help I might get from you guys. Thank you.

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post #2 of 7 (permalink) Old 05-04-2011, 08:55 PM
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Check the ball joint on the upper control arm, raise the car wheel free and hit the top of the upper control arm with the palm of your hand, if a thud OK but if a clack then it is busted.

Also check where the shock connects with the lower control arm for play.

ERIC.

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post #3 of 7 (permalink) Old 05-04-2011, 09:13 PM Thread Starter
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Thank you so much. I'll do that in the morning and let you know the outcome. Thanks again.
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post #4 of 7 (permalink) Old 05-04-2011, 09:24 PM Thread Starter
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Eric, is it possible to find out the two cars I have are in the balance shaft problem range from the VIN numbers?
WDBUF87X57B123999
WDBTK72F47T077141
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post #5 of 7 (permalink) Old 05-05-2011, 08:40 AM Thread Starter
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Good morning Eric. I did do what you told me and it is a thud noise so I guess that eliminates the upper control arm. The car is 07 clk550 cabrio and it has 54K on the clock. I did go with a Benz mechanic and he checked the car on the lift and on the road with me and he says it rides OK. I have a 07 e350 as well and that car is much tighter than this one. He says they just are different cars and I have to get used to this car. I just don't believe this car rides like Mercedes. The strange thing is that when the weather is humid or rainy, the noise is much less or gone totally. It comes from the right front corner of the car. Even when I go out of my driveway and over the little curb bump, and even as the rear wheels go over the bump I can hear the noise and feel it under my feet. It almost sounds like in the old days American cars had body bushings and when they went bad you would feel it under your feet. Anyhow, when I have a problem and I know what it is, I might be able to live with it for a while, but when I don't know what causes it I can't rest until I figure it out. So what do you think about this stupid problem?
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post #6 of 7 (permalink) Old 05-05-2011, 08:48 AM
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Originally Posted by E350CLK550 View Post
Good morning Eric. I did do what you told me and it is a thud noise so I guess that eliminates the upper control arm. The car is 07 clk550 cabrio and it has 54K on the clock. I did go with a Benz mechanic and he checked the car on the lift and on the road with me and he says it rides OK. I have a 07 e350 as well and that car is much tighter than this one. He says they just are different cars and I have to get used to this car. I just don't believe this car rides like Mercedes. The strange thing is that when the weather is humid or rainy, the noise is much less or gone totally. It comes from the right front corner of the car. Even when I go out of my driveway and over the little curb bump, and even as the rear wheels go over the bump I can hear the noise and feel it under my feet. It almost sounds like in the old days American cars had body bushings and when they went bad you would feel it under your feet. Anyhow, when I have a problem and I know what it is, I might be able to live with it for a while, but when I don't know what causes it I can't rest until I figure it out. So what do you think about this stupid problem?
Sorry but without driving the car I cannot give an answer.

ERIC.

___________________________________________
"I am enclosing two tickets to the first night of my new play; bring a friend, if you have one."
- George Bernard Shaw to Winston Churchill.

"Cannot possibly attend first night, will attend second ... if there is one."
- Winston Churchill, in response.
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post #7 of 7 (permalink) Old 05-05-2011, 08:58 AM Thread Starter
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Thanks anyway. At least now I know I have a place to get alot of info about the cars I have and the problems they may have in the future. Keep up the good work and have a great day.
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