i had noticed a strange noise out of the engine specially when the engine is cold, i had visited two dealers in warsaw trying to verify the damage, finally the Auto FUS dealer had informed me that the main METALLIC BELT INSIDE THE ENGINE should be changed, i left the car on their side for 4 days to repair it. i was very strange for me to have such a damage in the BMW Engine after 3 Months... i will attache photos of the engine.