2008 C230 4matic rattling sound under HEAVY ACCELERATION
I've been noticing a rather annoying rattling sound whenever i accelerate Heavily. It is quite short ( Almost as if 2 metal pieces were vibrating agaisnt each other) and it occurs for .5 seconds around 3000 RPM and 5000 RPM.
It does NOT do it while in neutral and I floor it. I went to the dealer the other day to change winter tires and talked to them about it. They only checked for ( i guess ) electronic problems as they say I should continue to monitor this ( They did not find anything wrong ). I am going again to have my side mirror frames replaced in 2 weeks and consider bringing a tech for a drive with me.
The sound is not that loud, but loud enough to be heard.
My friend who has a c350 from the same year does not have the same problem. The car has 40 000k and has always been driven very carefully by my mom. I never typically floor it, but it became an obsession once I discovered this. Also, it does not seem to do it when the engine is cold.
Any Help is muuuuucho appreciated

Thank you Gents
)http://www.youtube.com/watch?v=EUNPx...=youtube_gdata
)http://www.youtube.com/watch?v=EUNPx...=youtube_gdata
http://www.youtube.com/watch?v=RFbxo...ature=youtu.be



