Unless you have a tune, downpipes, or anything that would void the warranty why would you not just bring it back to the dealer in this situation? I understand you just got the car but the this is something you should have service handle before it turns worse.
I don't know much about how cars are handled during shipping but either something was missed during the pre-delivery inspection or the spark plugs are bad.
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2018 BMW M5 Black Sapphire Metallic
GONE - 2013 Audi S6 Phantom Black Pearl
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