hi guys,
after some reading and some videos I have the VNAV on the route get to run. But you have to stay within 5 minutes before the ToD to automatically descend. If the time is longer, turning the Altitude select button or pressing the VNav button again does not help to initiate descent in my case. Unfortunately, I have no experience with a real G1000 and I can not say whether it is up to me or if it is a bug in the simulation. However, in all cases, it does not match the documentation.
I also tried to use VNAV after activating the approach. This results are completely incomprehensible results for me. I have to test that even further.
Greeting SirJohn62