Clunk in E320 4matic

I have a 2001 320 4matic with 14,689 miles on it (recently purchased) and when I take my foot off the gas and coast for a few seconds and then apply
the gas I get a slight clunk in the back. And, when rolling to a stop, as the car downshifts into 1st gear I ocassionally hear a light clunk as well. Took it into Mercedes today and they told me that the noise is normal on the 4matics. Does that sound like a snow job or legitimate information?? I've started an informal poll (spoke to a 320 4matic owner at a gas station today and will ask others I encounter on the street) and would like to hear from the folks on the forum. For all the engineering prowess that has made Mercedes a premier brand I find it hard to believe that this annoying clunk would be a "standard feature" on their cars.
Thanks,
Jeff snipped-for-privacy@optonline.net
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Could be a baffle in the gas tank of the car.........This would be more apparent with LESS then a full tank of gas in the vehicle. -Dana

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Sounds more like slack in the drive line to me. Perhaps a driveline carrier, or u-joint or rubber ujoint type thingie... Could also be something slack in the rear end?
I don't know about 4-matics but this doesn't sound "normal" or acceptable to me.
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Is the noise from the right side around the gas filler? If so, there is a plastic canister for something (gas fume?) in the tire fender. Mine got off the fastening clips and made a clunking (thumping) noise. After removing the tire fender fasteners you will see it between the rear tire and the rear bumper. I have 2002 E430 reg. automatic so yours might be a different problem. Good luck! - Mo -

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I had the same vehicle with the same noise. The dealer worked on it many times change several parts in the drive train. They eventually had a MB rep look at the car and claim it "normal". We both drove another 4matic and it also had the noise. I ended up selling the car because I don't need to hear that noise everyday from a "luxury" car. Glenn
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I dropped the car off at Mercedes of Greenwich and I got a call from them in the afternoon telling me that the clunking noise was because one of the transmission brackets was broken and the tranny was shifting a bit when gas was appplied or taken off. They noticed that there was a few drops of oil leaking from the trans-axle case so they were going to replace the seal, the air flow for the air conditioner was "Ok" not quite what is should be and since it is a known problem they were going to replace the air conditioning regulator, the squeaking when the steering wheel is turned is a known issue and there is a fix for it, there was a squeak every so often in the cabin - seemed to happen when the car was leaning in a turn - yep - known problem the driver side seat frame is being replaced. Software is being updated, oil change, wipers... and a full service update - at no cost. They asked me if they could have the car for 2 days to make sure they got everything - hell yes, take 3 days if you want. I'm smiling on this side of the keyboard.
Jeff

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Let us know if the smiling continues when the car comes back...
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Your smiling but your car is in the shop. Instead of more dealers like this, we need less cars like that. I was seriously looking at a e320 this week but just cant do it. To many horror stories.
Someone tell me about how great their newer merc is. I need some reassurance. I actually went to look at lexus, infinity and Volvo of all places. I dont know what the heck I want now. (sub 35k 2003 or newer smallish sedan is all I know now) KH
said:

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