I took delivery of my F30 328i 6 days ago and have noticed the same issue. It is extremely annoying. Whenever I travel over a bumpy road or go in and out of driveways, I hear the creaking noise, and in my car it sounds like it is coming from all doors.
My friend has an F30 328i Luxury line with a Sunroof, and it does not have this issue whatsoever.
My inside door handles also make the same creaking noise when you grab them to pull the door shut. I have the high gloss black trim finish - not sure if this has anything to do with it or is contributing to overall creaking noise?
Any help would be much appreciated. I will try washing the door seals to see if that makes any difference..
BMW F30 328i | Sport Line | Mineral Grey | Bi-Xenon | Rear View Camera | Extended Bluetooth/USB | Sunroof | High-Gloss Shadow Line | Anthracite headliner | Black leather