You should go back to your dealer and avail the warranties, do not touch anything yet. It will void the warranties. Dealers would love to listen and help you with your concerns. I am sure they can fix it in no time.
Is it still under warranty? If it is still under warranty i strongly suggest not to go through with any DIY maintenance or any attempts to fix it on your own, just as @John mentioned it will void the warranty and you will pay for everything on your own.
So I'm the only one here then haha. I already went to my dealer but they said they don't know where to start and trace where the rattles are coming from.