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If I try to summarize what has been written here and what my dealer told me, this it what we know so far:
1. It doesn't matter what kind of wheels you put on, or if it's summer tires, studded tires, RFT etc. The size or model of rim doesn't matter either.
2. Some have replaced wheel bearings and the sound is still there, but can also have changed a little bit.
3. It is only Touring who have this problem here.
4. There are several sedans that don't have this noise. Maybe all.
5. Bmw says that it's seems to appear only on M-chassi cars
6. The sound starts from 40 km/h or something around that speed. Not so much speed related otherwise
7. The oldest car so far is from August, but that one was quieter(?) and had adaptive chassi. Most cars here are produced in September/October.
This is what I think should be very interesting:
1. Has anyone driven a touring with m, that doesn't have this noise? And if so when was it produced?
2. Has anyone driven a sedan that have it? And if so when was it produced?
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