Screeching rattling noise

[Silver_Bullet_S550]

As the title says...it's the best way I can describe it. It comes and goes whenever it wants. Sounds like it's coming from the rear. Has anybody else heard this noise on their cars?

I have a 2016 GT Premium A6

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[MadMB]

What RPM? Are you in S mode?

 

[Silver_Bullet_S550]

What RPM? Are you in S mode?

it does it at random RPMs but mostly when i'm around 35-45mph, it'll just happen, then stop, then come back, then go away for a week or so. it does it in Drive and Sport Mode

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