Hi people! Would really appreciate your feedback!
I have done quite a lot googling about the topic, but I am still confused 😞 Some seem to say that this is normal "feature" for DSG and Haldex 4x4 system. Others have indicated that this could be something in the DSG Box (e.g bearings).
In this case, the howling sound is present in all the gears (1-5). This leads me to think that maybe it is not the gearbox, but the diff? I also remember from one topic, that somebody mentioned alternator overload causing similar whine. However, alternator would also cause similar sound when driving and shifting to neutral, right? In this case, the howling stops when you push it out of gear to neutral while moving.
Thanks to anybody willing to share their opinion and previous experience!