I've had the opposite experience on the very few times I've tried the built-in nav. I was driving home via the M4 but it was closed due to the roadworks & the nav didn't tell me. Switched to Google Maps on Android & that correctly routed me around it. Not that I needed the nav, but I usually turn it on for exactly that purpose and to give a decent ETA, so complete fail on the part of the VW version!The ID.3 also seems to know to interrupt me with constant "A road is closed somewhere within the region of the country in which you live, just thought you'd like to know" type irritants. Really need to figure out how to switch that off.