E-Class (W212) 2010 - 2016: E 350, E 550

2010 C300 tranny noise (maybe someone on e class forum can help)

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Old 05-17-2014, 10:22 AM
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2010 C300 & 2014 E350
2010 C300 tranny noise (maybe someone on e class forum can help)

No one on the c class forum can help so I thought maybe someone on this forum might have more knowledge on my 2010 C300

I get a single knock/pop noise after coming to a complete stop

When I am in gear going 40 MPH per hour and coming to a complete stop I hear this single knock/pop noise and it sounds like its coming from the front passenger area of the engine. When I put the transmission into NEUTRAL while going 40 MPH and coming to a complete stop there is NO single knocking/popping noise.

I tried this exercise several times.

My car is almost out of warranty and I hope it's not a sign of a tranny problem. I would at least like it to be documented by Mercedes.

Can anyone chime in?
Old 05-23-2014, 04:52 PM
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The dealer says it is probably the rear engine mounts AKA the transmission mounts. What's the consensus on this diagnosis?

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