Rattle noise only when Car is warm

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New Member
Sep 4, 2021
Mercedes Benz e class
Hello Community,

I have an e class 2012 with currently 70000 Miles on The clock, i noticed when The Car is warm and you left it at your parking for 20-30 mins, there is a Strange rattle Sound, i am Not thinking that this could be The Chain, AS this Happens only when The Car is warm and i have no noise on coldstart compare to Other Videos on youtube The Chain Sound is quite loud, i could also notice this similar Sound in some Other Cars AS Well when i was going for Shopping etc. (Audi,VW)

I have also Upload a Video, If this might could Help
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Many thanks in advance
Could be the alternator pulley.
Try to record it with the bonnet open.

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