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SLK 320, E320 4_M
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67 Posts
Discussion Starter #1
I am experiencing a sound similar to what might be expected from a loose or vibrating muffler or cat. It occurs only when riding over a rough surface such as expansion joints in a parking garage. I have had my mechanic check out the problem, but the muffler or the cats are not the problem. Eveything under the car appears secure and tight. Has anyone experienced the same problem or have suggestions what might be causing a pinging sound?
 

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Premium Member
SLK 230
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1,498 Posts
Cat's can rattle when they go bad.
What year is your car?
 

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00 C-230, 04 C-240
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468 Posts
I'm having a same problem with a 2000 C230. It sounds like the mufflers is hitting something when driving over rough surface. I checked everything & could not find the problem. It mights the rear suspension bushings.
 
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