E-Class (W211) 2003-2009

Thumping sound when letting off gas

Old Aug 8, 2018 | 07:30 AM
  #1  
LexBrett2's Avatar
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From: DC Metro Area
2007 Mercedes E550
Thumping sound when letting off gas

Hi All:
When I let off the gas, I hear a thumping sound coming from my rear passenger side.
It almost sounds like it is related to the gas tank.
I let off the gas "click/thump", whether driving fast or slow.
Any ideas?
At first I thought it was a suspension item, but I did a couple searches and it was suggested it could be a differential busing.
Thank you very much in advance and have a great day.
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Old Aug 8, 2018 | 09:40 AM
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rapidoxidation's Avatar
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From: In the Shadow of the Tetons
2013 ML350 Bluetec
My first thought is driveline lash. Can you tell if there's any slop in the drive shaft?
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Old Aug 8, 2018 | 10:26 AM
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LexBrett2's Avatar
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From: DC Metro Area
2007 Mercedes E550
Doesn't feel like there is much slop in the drivetrain, but there is a little.
I guess I will inspect differential bushings?
Wonder if it could be transmission related? My car is due for ATF change anyway
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Old Aug 8, 2018 | 12:52 PM
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2001 E320 Wagon, 2006 LBZ Silverado, 2007 E63 (sold), 2001 E55 (sold)
Check the center bearing and support as well.
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Old Aug 8, 2018 | 01:46 PM
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2007 Mercedes E550
Here is the diagram, what parts do you all suggest I check?


REAR AXLE. DIFFERENTIAL. DRIVE AXLES.

PROPELLER SHAFT. AXLE SHAFTS & JOINTS.
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