I suspect it is linked to weak singal, but I don't have a clear evidence yet 🙂 I got the car since 3 weeks now and had already the issue twice...both times it happened during period of freezing & snowing weather conditions. Is it linked to that or pure coincidence? First time I used the "change password" technique to get rid of the sync error messages...but I don't want to be changing password every time the thing pops up!