Originally Posted by
FJ Steve
This is not an RNS510. It is a Chinese clone, running a Windows CE platform. Firmware developed by Continental and VW will not do anything positive to this unit, more than likely, will damage it.
You need to find out/recall what generation WinCE platform the system was/is using and (maybe) reload that firmware.
GPSUnderground.com could be a source, or speak to the previous owner of the vehicle (if you know who it was).
Finally, if all else fails, could be time to upgrade to a more serious touch screen GPS Headunit (Viz, Alpine, Pioneer or VW OEM - RNS510).