New Member. Need some help

[tauro]

Hello all! New member here! I have just had my Mercedes E300 Coupe 2018 petrol delivered to me today by Mercedes and I couldn't help but notice a faint whistling noise coming from the engine when stationary and when on the move. The car has 25k miles and always been serviced by Mercedes. I spoke to Mercedes and they said they have done all the checks on the car before delivering it to me. Has anyone else on here have the same issue? Is it something I should be worried about?
Thanks in advance

Is it a super charged engine?

 

[Jayyy]

Hi All

Just an update on my post. Took it to mercedes no fault was found. Have a friend who has the same car which makes a whistling noise (believe it's standard) saw a lot of vids on youtube and can hear the sound slightly so not much of a bother anymore! Thanks all for your input