EQB 350 4matic – Squeaking while driving backwards

Hello everybody, I’ve had the EQB 350 4 matic for 3 weeks now. I’m actually happy too. Unfortunately, paint errors, which existed after handover in the matt lacquer, still have to be eliminated. The effort will probably not be insignificant. But the reason for this post is something else: The car squeakes quite quite when driving back, and indeed, even if I’m not on the brake, so I think it has nothing to do with the brake. It’s also clear when the window is closed. nd already had similar experiences? I will certainly have it looked at, but would like to avoid the usual “these are normal operating noises”. Thank you for your feedback. Greetings D.