Is your Van a European van (import) ?
see below for the reason I ask
I email your post to SatNavSystem (yesterday) here is a response from Hamid:
“Regarding the issues you mention, the T6.1 is on the MIB3 platform which is completely different to the T6 (MIB2).
In all honesty, they are not nearly as good/reliable and we are aware of many issues with them regardless of whether they have the standard or upgraded system!
I myself continue to concentrate on the MIB2 / T6 systems as they keep us very busy but Adam is more knowledgable about the MIB3 systems.
We have actually performed a few upgrades on T6.1s from the basic system to the Discover Pro with varying levels of success as there are inherent issues with the MIB3 systems, even in the VW Golf Mk8 and ID.3 models.
VW are aware of this and are continually releasing software updates in an attempt to resolve the issues.
Please also note that Japanese region VWs are very different to European ones.
This is certainly true with passenger vehicle so I assume it would be the same in T6/6.1 models so information we have may not be relevant to Japanese vehicles.”
suggest opening up a dialogue Direct with SatNav System, details are on the website link I posted in post #36
email:
info@satnavsystems.com
good luck