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Discussion Starter #1
I just bought a 2007 E63. What a car!!!! However I have noticed that when stopped or at slower speeds I hear a "knocking" sound coming from what seems to be the right rear of the car. It doesn't do it all the time and the intervals between knocks changes. It might do it at higher speeds as well but with so much other noise I don't notice it. Does anyone know what it is?
 

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2001 E320 - Brilliant Silver/Ash: 107,000+
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Have a look in the AMG section (W211). Just scroll down from here until you see it. Welcome to the forum.
 

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E 550 4 matic 2010
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465 Posts
I think it s part of the fuel tank venting system... I know on the newer ones lots of people hear it. Also under the hood part of that system can be heard. Dealer told me all this is normal.
 

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Discussion Starter #4
I've heard it could be that or the braking system. Either way it doesn't seem to be affecting anything. Thanks for the replies!
 
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