I'm having the same problem with 0 satellites but im not using the navigation system so im in no rush to fix it.
If I was to give it a go i would try to buy a new antenna, plug it into the MMI and leave it somewhere in the dash like in the video here;
If I was to give it a go i would try to buy a new antenna, plug it into the MMI and leave it somewhere in the dash like in the video here;