Short Circuit Navigation Electronic Problem

I had a problem with my car. There was no current in the battery and I put a new battery. But after one day I had the same problem, no current in the battery.

After I tried to check with the fuses which circuit the problem is. After long search I found out that the RNS-D an particulary the navigation is consuming the battery.

Is it a common problem with this RNS-D system?

Is it possible to fix it? And how much will it cost?

Kind regards